Solvent limits in vehicle refinishing products
In this guide:
- Using and managing solvents
- What are organic solvents?
- Pollution prevention and control permits for solvent emissions
- Why you should monitor your solvent use and emissions
- Advantages and disadvantages of solvent emissions monitoring techniques
- Using your solvent emissions data
- How to manage solvents efficiently
- Reducing solvent use in production and cleaning processes
- Reusing and recovering solvents
- Storing and using solvents
- Solvent limits in paints and varnishes
- Solvent limits in vehicle refinishing products
What are organic solvents?
Examples of organic solvents, what they are used for in business and why you should use and store solvents carefully.
An organic solvent is a type of volatile organic compound (VOC). VOCs are organic chemicals which vaporise at room temperature.
What are organic solvents used for?
Organic solvents are useful for dissolving certain materials and substances. Organic solvents are often used in the manufacture of pharmaceutical products, footwear, paints, varnishes and adhesives.
Organic solvents in manufacturing are typically used:
- to dissolve substances
- to disperse coatings
- as media for chemical reactions
- as cleaning agents
Examples of organic solvents
Types of organic compounds used as solvents include:
- aromatic compounds, eg benzene and toluene
- alcohols, eg methanol
- esters and ethers
- ketones, eg acetone
- amines
- nitrated and halogenated hydrocarbons
Are organic solvents toxic?
Many organic solvents are classified as toxic or carcinogenic. They can cause significant air and water pollution, and land contamination.
Organic solvents react in the atmosphere in sunlight, producing an air pollutant known as ground-level ozone. High concentrations of ground-level ozone seriously affect human, animal and plant health. They also harm building materials, forests and crops.
It is important for health and safety in your business to store organic solvents safely.
Get a free sustainability report
All Northern Ireland businesses with an annual energy and resource spend of more than £30k can get a free assessment of their environmental performance across areas such as raw materials, energy, carbon, packaging, biodiversity and waste - find out more about Invest NI Sustainability Reports.
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Pollution prevention and control permits for solvent emissions
When you need a pollution prevention and control permit for your solvent emissions from your business.
If you use solvents in your business, you may need a pollution prevention and control (PPC) permit from the Northern Ireland Environment Agency (NIEA) or your district council before you can operate. For example, you may need a permit if you use solvents in:
- printing
- surface cleaning metals and other materials
- coating or laminating materials such as metal, plastic, textiles, paper and wood
- manufacturing paints, varnishes, inks and adhesives
- manufacturing pharmaceutical products
- manufacturing footwear
- dry cleaning
- rubber conversion
- refining or extracting vegetable oil
- impregnating wood
Comply with your permit
If you have a PPC permit you must comply with the conditions it contains. These will reduce or control your emissions of organic solvents (volatile organic compounds (VOCs)).
Your permit will contain details of limits on your solvent emissions and how and when these must be met. For example, you may choose to follow a solvent reduction scheme and you may have limits imposed on specific substances, or you may have limits associated with your production units, such as 25 grams of organic solvent per pair of shoes manufactured.
Your permit will also specify:
- any abatement equipment required
- any monitoring and reporting requirements that you must comply with
- other measures to control solvent emissions, such as handling and storing materials correctly
- any controls or limits on releasing solvents to land or to groundwater
If you have a permit, you must produce a solvent management plan and submit it to the NIEA or your district council. The solvent management plan must show your annual solvent consumption and that you comply with the emission limits in your permit. It must include any calculations you make.
If you already have a permit and it doesn't contain conditions controlling your solvent emissions, you must contact the NIEA or your district council immediately.
If you don't comply with the conditions in your permit, you could be prosecuted.
Even if you don't need a permit, you should manage your solvent emissions and reduce your solvent use - see the pages in this guide on managing your solvents efficiently and reducing solvent use in production and cleaning processes. Your business needs to be aware if you are close to the thresholds for requiring a permit.
Using harmful substances
There are additional requirements if you use:
- halogenated VOCs which have been assigned the risk phrase R40 or R68, or the hazard statements H341 or H351
- VOCs which carry the risk phrases R45, R46, R49, R60 or R61, or the hazard statements H340, H350, H350i, H360D or H360F - all of these have been classified as carcinogenic, mutagenic or toxic to reproduction
Risk phrases are used to classify dangerous substances. A system of numbers relates to short descriptions that tell you about the substance's dangerous properties. From 2010 to 2015, risk phrases will be replaced by hazard statements. During this period both risk phrases and hazard statements will apply.
You can find out if a solvent has any risk phrases or hazard statements by checking the safety data sheet (SDS) that comes with it. Your supplier must provide you with the SDS under the requirements of the REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) Regulation. If you receive any solvents without an SDS, contact your supplier and ask for it. Read about risk and safety phrase information on the Health & Safety Executive (HSE) website.
If you use VOCs which carry the risk phrases R45, R46, R49, R60 or R61, or the hazard statements H340, H350, H350i, H360D or H360F, you must replace them as soon as possible with less harmful alternatives.
If it is not possible to replace them you must:
- contain and control emissions
- meet very strict emission limits
- regularly reassess the possibility of replacement
For further details, read the process guidance notes relevant to your business' activities.
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Why you should monitor your solvent use and emissions
The reasons for monitoring your solvent use and emissions, and the benefits of doing so for your business.
You may need to monitor your solvent use and emissions to comply with regulations, but it can also help you to reduce costs.
Benefits of monitoring your solvent use
Monitoring your solvent use can have significant benefits for your business. You can reduce solvent use and waste throughout your business, from delivery, storage, on-site distribution and handling to production, cleaning, waste recovery and disposal. Some solvent reduction measures can be implemented quickly with no extra cost, while others may require more initial investment but provide significant long-term savings.
Reducing your solvent use can help you to:
- reduce the cost of buying materials and disposing of waste
- improve productivity and product quality
- enhance the environmental performance of your business
- comply with environmental, and health and safety legislation
- improve working conditions and employee morale
- reduce the risk of pollution incidents
- improve public image and relationships with stakeholders such as the local community, regulators and investors
- improve your customer base, as environmental impact is an important factor when customers are buying your products or services
Set clear objectives
The type of monitoring you carry out will depend on the results you need to get. For example, if you need to monitor your solvent emissions to comply with regulations, the legislation will indicate the type of information you need. You may have to:
- carry out stock monitoring and control - eg quantities of organic solvent in materials, amounts purchased and used
- monitor emissions periodically or continuously
- provide total emissions data or detailed information about specific compounds
- record the conditions under which measurements are taken - eg pressure, temperature, oxygen content and operational conditions
- carry out calculations of mass emissions, requiring flow-rate measurements
- comply with specific regulatory requirements
If you are monitoring solvent use as part of a solvent management programme to help you reduce costs, you may need more regular and detailed sampling techniques.
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Advantages and disadvantages of solvent emissions monitoring techniques
How to decide which solvent emission monitoring techniques and equipment are best for your business activities.
You may need to use a variety of techniques and equipment for monitoring solvent emissions. When choosing these, you need to consider:
- the type of data you require
- the frequency of monitoring
- safety issues
- operating restrictions of equipment such as temperature and humidity
- the accuracy you require
- how easy it is to repeat measurements
You should also consider the reliability and robustness of equipment, as well as its accreditation or certification - eg to British Standards. If you are subcontracting all or part of the process, you should check the capabilities of the sampling personnel and laboratory facilities.
You need to decide whether to monitor your solvent emissions using in-house resources or to contract the work out to a specialist organisation. If you do it in-house, you'll also need to decide whether to hire or buy the necessary equipment.
Using a specialist organisation
Advantages include:
- you do not need to buy and maintain equipment
- you have access to experts who know the appropriate monitoring techniques
- no specialist internal training is required
- you can use independently accredited or certified equipment, personnel and sampling laboratories
- possible reduced costs by having a competitive tender process
- they are covered by insurance
Disadvantages include:
- you need to specify the right services - re-tests and re-analysis will increase costs
- you may need to spend time working closely with the sampling team to ensure that the correct monitoring is carried out at the right time
- you don't have direct control over proceedings
- you will need to pay contractor and laboratory fees
- you may also have to hire specialist access equipment
Using internal resources with hired equipment
Advantages include:
- no equipment maintenance except some attention during monitoring
- no capital expenditure
- having the right equipment and being able to change it if necessary
- ensuring accuracy with the right staff training
Disadvantages include:
- you may need to supply scaffolding or other means of access, and power supplies
- you must ensure equipment is calibrated correctly
- equipment is on site for a short time only to complete monitoring
- you need to train staff to operate the equipment
- you need to devote internal resources to monitoring
- you are responsible for deciding which monitoring techniques to use
- you will need to pay for hire charges, training, staff and other internal resources, laboratory analysis and insurance
Using internal resources with bought equipment
Advantages include:
- flexibility - you can monitor emissions when it suits your business and as often as you like
- you can ensure accuracy with the right staff training
Disadvantages include:
- you need to maintain, calibrate and test equipment
- equipment may be a very expensive capital investment
- you need to train staff to operate the equipment
- you need to devote internal resources to monitoring
- you are responsible for deciding which monitoring techniques to use
- you will need to pay for the initial investment in equipment, staff training, maintenance, staff and other internal resources, laboratory analysis and insurance
Using recognised equipment and services
Outside laboratories should have the appropriate UK Accreditation Service (UKAS) accreditation - you can search for an accredited laboratory.
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Using your solvent emissions data
How to interpret and analyse your solvent emissions data when you put a solvent monitoring programme into practice.
It is important to manage your solvent monitoring plan carefully so that you get reliable and useful results. Use your data as soon as possible after monitoring, so that you can submit accurate and up-to-date information, and improve your processes to save your business money.
Implementing your solvent monitoring plan
To ensure accurate and reliable results you should:
- give one staff member overall responsibility for the project, and nominate a deputy
- define in detail what you're monitoring, including timings and methods, with named individuals to look after different aspects
- train staff as appropriate - this is particularly important if you're using in-house resources to do the monitoring
- set up a method of recording the results
- agree the process with the contractor's team, if you're using a subcontractor
- decide where the samples are to be taken - equipment manufacturers or your contractor should be able to advise on this
- conduct trial monitoring over a period of several days to make sure the procedures work and the sampling process is accurate and relevant
- take enough samples when you start monitoring to get meaningful results
- follow the monitoring requirements stated in your permit
Submitting solvent emissions data
Use your data from monitoring promptly, as it will become outdated quite quickly.
If you monitor solvent emissions to comply with a pollution prevention and control permit, ensure you send it to the regulators on time and in the required format. You may also benefit from using the data for internal review, process control assessment and cost analysis.
Evaluating solvent emissions data
Look at your data with relevant staff and consider whether:
- emissions are lower or higher than expected and, if so, find out the reasons
- there are unexpected emissions, suggesting in-house problems such as waste, leaks or process control issues
- you could save money by cutting solvent use, considering alternatives to solvents or changing processes
- you are using the right monitoring techniques and equipment, and if they give you the information you need
Using solvent emissions data
You can use the data:
- to optimise the size and cost of pollution abatement equipment
- as part of a solvent management plan to reduce solvent use and emissions
- within an environmental management system
- as part of a Control of Substances Hazardous to Health (COSHH) Regulations assessment - you can find information on the COSHH Regulations
When you review your solvent emissions data and the management programme, you should also consider whether you can improve your processes to include solvent capture, recovery and reuse. This could help you reduce your solvent use and save money.
Reviewing solvent monitoring processes
Solvent monitoring is not a one-off process. The programme you put in place will probably need updating. You should review your results regularly to ensure you are getting the data you need and monitoring continues to do the job intended.
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How to manage solvents efficiently
How to develop an effective solvent management plan for your business and purchase solvents efficiently.
Managing your solvents efficiently can help you reduce the amount of solvents you use, and help you to consider cheaper alternatives.
To help you manage your solvents, you should:
- appoint someone to be responsible for how your business reduces and manages solvent use
- review your business' solvent consumption and emissions - look at where most solvents are used and why, and where the highest emissions are
- make an inventory of solvent stocks and review your purchasing processes
- consider ways of reducing solvent use and waste
- consider using alternatives to solvents
- prepare and implement an action plan to reduce solvent use, with objectives and measurable targets
- review your solvent management plan regularly to ensure that it works effectively
- report on your solvent savings regularly
Train staff for solvent management
You need support from everyone in your business to ensure your solvent management plan is successful. Any staff responsible for solvent management should be trained in:
- how to handle, store, use and clean up solvents and solvent-based materials and wastes
- how to use solvent-related equipment
- solvent waste management
Training should include potential cost savings, health and safety implications, the environmental impact of solvents and other benefits such as improved profitability.
Save money by using solvents efficiently
Only buy the quantity of solvents that you need.
Talk to your suppliers about introducing a just-in-time process, where materials are delivered as and when you need them. If you need to hold stock, carry only the minimum necessary and make sure that older materials are used first.
Don't over-order to allow for waste. Reducing the amount of solvent you waste will help you to order more efficiently and save money.
If you use a lot of solvents, buying in bulk can save you money, reduce packaging and waste. Keep records of all solvent purchases, including:
- how much you bought
- where you bought it
- where you store it
- how much you use for particular jobs
- how much you return as waste
- how much you recycle or recover
Check whether your supplier offers a solvent reclamation service. This can help you to reduce costs when buying solvents. It will also help reduce the volume of solvent you use, if you need to declare your annual use to comply with your pollution prevention and control permit.
Consider using less harmful low-solvent or no-solvent alternatives. Water-based and low-emission materials are now available and can save you money. You should discuss these options with your suppliers and relevant staff.
Check all material deliveries to your site by:
- reviewing ordering processes to ensure that deliveries match your orders
- installing a vehicle weighbridge to check bulk deliveries against invoiced quantities
- checking how much residue is left in solvent delivery containers immediately by comparing the empty container weight with a clean container
Use an environmental management system
If you have an environmental management system, or plan to implement one, you should use this to manage your solvent use - see how to set up an environmental management system.
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Reducing solvent use in production and cleaning processes
How to reduce solvent use in your business production and cleaning processes with the help of suppliers.
Reducing your solvent use can lead to a number of benefits.
Production processes
You can reduce solvent use during production processes by:
- talking to suppliers, trade associations and similar businesses about new products and processes
- pre-cleaning with non-solvent cleaners, eg line pigs, detergents, high-pressure sprays
- using sprays or other delivery systems rather than open containers when applying solvents
- sealing solvent containers with well-fitted lids, and using adhesive tape to make them airtight to minimise evaporation and contamination
- sealing containers without lids with anti-static plastic covers or stretch-wrap
- keeping solvent containers away from heat and draughts
- fitting mixing vessels and reservoirs with automatic shut-off devices or overfill alarms to avoid spills
- making sure that you contain solvent emissions wherever possible - fit a lid (even if it is partial) to degreasing or mixing vessels, and minimise emissions by using extraction systems
- using an extraction system to remove solvent emissions from closed vessels to prevent internal pressure building up
- ensuring any extraction system operates at an optimum when releases of solvent emissions are most likely, eg when vessels are open, during mixing or during production processes
- fitting alarm systems to pollution abatement equipment to alert you if there are uncontrolled emissions
You can also avoid wasting solvents by:
- pouring materials during mixing in order of volatility from lowest to highest
- using precise measuring techniques
- preparing the correct amount of materials required
- marking measurements on the container side when decanting from large containers
- avoiding splashing when filling mixing vessels and machine reservoirs
- using a funnel to reduce the risk of spills when pouring
- leaving containers open for the minimum time possible while preparing for use
Cleaning operations
Cleaning often uses more solvent than is necessary. Review your cleaning processes and consider alternative solutions, such as low-emission cleaning agents - eg citrus or water-based and vegetable-based degreasing agents.
Use the minimum amount of solvent necessary. For example, you could use a triggered spray to use less solvent and reduce operator exposure.
Introduce a 'clean as you go' policy to prevent deposits building up. If build-ups do occur, you should try to use non-solvent cleaners and a suitable scraper first to pre-clean. For difficult deposits, use a detergent with mechanical scrapers, floor scrubbers and high-pressure water jets. Fit sumps or drains with solvent interceptors and tanks which you can pump solvent out of for recovery or disposal.
If you can, use dedicated equipment so that you can avoid having to clean equipment between batches. Producing batches using similar materials or colours may help reduce cleaning.
Fully enclosed degreasing and cleaning equipment cuts evaporation and can enable you to reuse solvents. If you have to clean large vessels or tanks regularly, consider fitting automated cleaning-in-place (CIP) systems. These generally use high-pressure cleaning and can significantly reduce solvent use.
Consider pigging to clean pipelines. This involves forcing a plug or 'pig' that is normally made of rubber or steel along the pipeline. Advantages of pigging include:
- recovering expensive materials for reuse
- reducing the amount of cleaning solvent required
- potentially rapid return on investment
For more information on CIP and pigging, see our guide on how to save water at industrial premises.
Adhesives
If you use adhesives, try to find non-solvent based products. If there is no alternative to using solvent-based adhesives, you can cut solvent emissions by:
- monitoring and recording how much adhesive you are using to check you aren't using too much
- reducing evaporation by using pots with vapour traps and appropriate lids, or pots that minimise the surface area of adhesive
- storing brushes in sealed containers with cleaning solvent in the bottom
- using dosing devices to apply a controlled amount of adhesive, eg glue guns
- making sure reservoirs are properly sealed if machines are used to apply adhesive
- enclosing adhesive-application machines fully and fitting an inspection window if necessary
- pumping low-viscosity adhesives directly to the application point, glue gun or coating head
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Reusing and recovering solvents
How to recover solvents and reuse solvents in your business, minimising waste to save disposal costs.
It can often be cost-effective to reuse solvents instead of disposing of them. If you can't do this with the solvents you use, talk to your suppliers, your trade association or similar businesses to yours to discuss alternative products.
You can improve your solvent recovery rate by:
- keeping solvent residues separate to avoid cross-contamination
- pre-cleaning products to be treated with solvent, so they are free from contaminants that can cause sludge
- matching cleaning solvents to those used in product formulations to prevent contamination
Depending on the products you use, you may be able to use distillation equipment to recover solvents, or use solvent capture and recovery. This can cut the costs of your materials, waste storage and disposal. If this isn't possible, you may be able to find an organisation that recovers used solvents and solvent-based wastes.
Procedures that will help you recover solvents include:
- separating solvents from other wastes
- designing solvent mixes to be attractive to recovery specialists
- storing waste solvents in a secure location
- making sure waste containers are sealed and in good condition
- keeping spare clean containers so that you can transfer waste solvent from damaged containers
- considering using bulk tanks rather than drums
- labelling waste properly using waterproof labels
- ensuring waste solvents are removed from your site regularly
- keeping records and consignment notes for all waste solvents or solvent-contaminated materials that you keep on-site and transfer off-site
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Storing and using solvents
How to minimise the risk of solvent leaks and spills by storing and handling solvents safely in your business.
You should store and use solvents carefully to avoid pollution from leaks and spills. If you cause pollution, you could be prosecuted or fined.
Check safety data sheets
Ensure that your solvent supplier gives you an up-to-date safety data sheet (SDS) with every order. An SDS provides information on safe solvent use, and what to do in the case of an accident.
Make sure that your employees:
- are aware of and understand the information in the SDS
- know where the SDS is kept
- have ready access to the SDS, in case it is needed in an emergency
Store solvents safely
Keep solvent containers closed when you're not using them. This will minimise emissions to the atmosphere by evaporation.
Avoid using underground storage tanks (USTs) for solvents. If you already store solvents in USTs, contact the Northern Ireland Environment Agency (NIEA) for advice.
If you need to store waste solvents, or wastes contaminated with solvents (eg cleaning cloths), keep them in sealed containers.
You should locate, use and maintain solvent storage facilities as you would other chemical storage facilities - see storing chemicals.
Use solvents safely
Ensure staff who use solvents are appropriately trained.
You should place all cloths contaminated with solvents in a closed metal container after use and consider reusing them.
Only use, pour and mix solvents in designated areas. These areas should be well labelled, well ventilated and have appropriate secondary containment systems. If you use solvents for cleaning purposes, consider using equipment that will minimise emissions, eg a sealed system.
Carry out regular risk assessments and make improvements to your processes from the results - see how to manage the risks in your business.
Transport solvents safely
Make sure you allow enough space for solvents to be safely delivered, removed and transported around your site. You should also:
- mark transport routes clearly through your site
- check regularly that there are no obstacles or sources of ignition
- ensure that all deliveries are made and accepted by properly trained staff
- ensure that delivery areas are clearly marked out, secure and free of obstacles
Deal with spills correctly
It is important that you and your employees know how to manage spills and leaks if they occur.
Have a pollution incident response procedure for dealing with spills. Make sure that all staff are fully trained in the procedure and how to implement it.
Your business may face prosecution if you allow solvents to cause pollution in the air (eg odour), watercourses, groundwater or land. You can reduce the impacts of a spill if you have proper procedures in place.
You should:
- keep equipment to deal with spills, eg absorbent granules and containment equipment, close to solvent storage areas
- have drain covers or drain valves to stop spills or leaks entering water drains or the public sewerage system
- have a reporting system for spills over a certain volume
- have a spill procedure for dealing with large spills and put procedures in place to prevent any recurrence
- seal solvent-soaked materials into a drum for recovery, reuse or disposal
- train all employees in your spill procedure
Report pollution incidents as soon as they happen to the NIEA Water Pollution Hotline on Tel 0800 80 70 60.
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Solvent limits in paints and varnishes
Check that paints and varnishes you manufacture, import, distribute or sell comply with relevant solvent limits.
If you place paints and varnishes on the market that contain organic solvents (volatile organic compounds (VOCs)) you must ensure that they comply with the relevant limit value. These restrict the amount of solvent that the ready-to-use product can contain.
Manufacturers, importers, distributors and retailers, including businesses that only mix paint, must check the VOC content of their products.
The table below shows the maximum VOC content limit values for paints and varnishes. The limit values are stated in grams per litre (g/l) when the product is ready to use.
Maximum VOC content limit values for paints and varnishes
Product* Coating type VOC limit (g/l) Interior matt walls and ceilings (degree of gloss ≤25 at 60°) Water borne 30 Solvent borne 30 Interior glossy walls and ceilings (degree of gloss >25 at 60°) Water borne 100 Solvent borne 100 Exterior walls of mineral substrate Water borne 40 Solvent borne 430 Interior/exterior trim and cladding paints for wood and metal Water borne 130 Solvent borne 300 Interior/exterior trim varnishes and woodstains, including opaque woodstains Water borne 130 Solvent borne 400 Interior and exterior minimal build woodstains Water borne 130 Solvent borne 700 Primers Water borne 30 Solvent borne 350 Binding primers Water borne 30 Solvent borne 750 One-pack performance coatings Water borne 140 Solvent borne 500 Two-pack reactive performance coatings for specific end use, eg floors Water borne 140 Solvent borne 500 Multi-coloured coatings Water borne 100 Solvent borne 100 Decorative effect coatings Water borne 200 Solvent borne 200
*For a more detailed definition of the products covered, read schedule 1 of the Volatile Organic Compounds in Paints, Varnishes and Vehicle Refinishing Products Regulations 2005.Also on this siteContent category
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Solvent limits in vehicle refinishing products
Check that vehicle refinishing products you manufacture, import, distribute or sell meet relevant solvent limits.
If you place vehicle refinishing products on the market that contain organic solvents (volatile organic compounds (VOCs)) you must ensure that they comply with the relevant limit value. These restrict the amount of solvent that the ready-to-use product can contain.
Manufacturers, importers, distributors and retailers, including businesses that only mix paint, must check the VOC content of their products.
The table below shows the maximum VOC content limit values for vehicle refinishing products. These limit values do not apply to the:
- original coating of vehicles using refinishing materials
- coating of trailers or semi-trailers
- coating of vintage or historic vehicles
- use of vehicle refinishing products in an installation with a pollution prevention and control permit
The limit values are stated in grams per litre (g/l) when the product is ready to use. Except for preparatory and cleaning products, do not include any water content of the ready-to-use product in your calculations.
Maximum VOC content limit values for paints and varnishes
Product* Coating type Limit value (g/l) Preparatory and cleaning Preparatory 850 Pre-cleaner 200 Bodyfiller/stopper All types 250 Primer Surface/filler and general (metal) primer 540 Wash primer 780 Topcoat All types 420 Special finishes All types 840
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