Solvent-based production covers formulations using organic solvents rather than water as the primary carrier, common in coatings, adhesives and some cleaning products. Solvent use is subject to volatile organic compound (VOC) emissions regulation in the UK, which is a key consideration when sourcing solvent-based manufacturing.
Key points
- The Solvent Emissions (England and Wales) Regulations 2004 limit VOC emissions from installations using organic solvents above defined thresholds.
- These requirements are now incorporated into the Environmental Permitting Regulations, enforced by the Environment Agency.
- A VOC is defined as an organic compound with a vapour pressure of 0.01 kPa or more at 293.15K, or corresponding volatility under conditions of use.
- Solvent-based production also typically requires flammable liquid manufacturing capability given most organic solvents are flammable.
What This Capability Involves
A manufacturer with solvent-based production capability holds the relevant environmental permits for VOC emissions where thresholds apply, alongside the flammable liquid handling and DSEAR compliance needed for safe solvent processing.
When You Need This Capability
You need a manufacturer with this capability if your formulation uses organic solvents as a carrier or diluent - common in solvent-based coatings and paints, some adhesives and sealants, and certain cleaning formulations.
Regulatory Considerations
The Solvent Emissions Regulations (now incorporated into the Environmental Permitting Regulations) require installations using organic solvents above defined thresholds to comply with emission limit values, enforced by the Environment Agency in England and Wales. A manufacturer using solvents above the relevant thresholds needs an appropriate environmental permit - confirm this is in place, alongside their DSEAR and flammable liquid handling provisions covered under flammable liquid manufacturing.
Two Constraints, Not One
Solvent capability involves two separate constraints that are easy to conflate. The first is safety: flammable solvents require rated areas, static control and appropriate storage. The second is environmental: solvent evaporation produces volatile organic compound emissions, which are controlled under the site's environmental permit.
A manufacturer can satisfy the first and still be unable to take your work because of the second. Permits carry limits, and a site running close to its VOC limit across all customers may have no headroom for additional solvent volume regardless of technical capability. Ask about both - see environmental permitting.
Recovery and Cost
Sites geared for solvent work frequently recover and reuse solvent by distillation, which reduces purchase cost, disposal cost and emissions simultaneously. A manufacturer that recovers solvent generally has a stronger cost position and more permit headroom than one that does not, so it is a useful question beyond its environmental interest.
It is also worth asking whether recovered solvent would be used in your product and whether that is acceptable to you. Recovered material is often perfectly suitable, but it is not identical to virgin solvent and may carry trace contaminants - if your product is sensitive to that, state it in the specification rather than assuming.
Questions to Ask a Manufacturer
- Do you hold the relevant environmental permit for VOC emissions from solvent use?
- What solvent recovery or abatement systems do you operate?
- How do you manage DSEAR compliance alongside solvent handling?
- What experience do you have with our specific solvent system?
Related Pages
Frequently Asked Questions
Does every solvent-based manufacturer need an environmental permit?
Only where solvent use exceeds the thresholds set out in the relevant regulations - smaller-scale use may fall below the permitting requirement, but this should be confirmed rather than assumed either way.
Is water-based production always preferable to solvent-based?
Not necessarily - the right choice depends on the product's performance requirements, and solvent-based formulations remain standard in some applications. This is a formulation decision to make with your manufacturer, not a regulatory one.
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Search the DirectoryLast reviewed: August 2026. Regulation and guidance change — verify anything you rely on against the primary source. Tell us if something here is out of date.