Release Agents

Cromwell stock a wide range of release agents as part of our large selection of lubricants and chemicals. Suitable for multiple applications, amongst the brands to choose from are names like, Ambersil, Henkel and Action Can, so you'll be sure to find the right solution for the job.

What are release agents?

Simply put a release agent, is a chemical that prevents materials sticking to surfaces. They can be used in various applications involving moulds, die-casts as well as on adhesives and plastics.

Why release agents?

Release agents work by forming a barrier between the cured substrate and the moulding surface, allowing for a clean release, with no fusing and a less difficult clean up.

When to use release agents?

Release agents can be used in a variety of applications, but are most commonly used in manufacturing, automotive and engineering industries.

Types of release agents

• Semi-permanent - These release agents allow for multiple releases before reapplication is required. They prevent contamination transfer and residue build-up from happening in the mould, prolonging the lifespan.

• Sacrificial - Silicone is a type of sacrificial mould release agent. They require reapplication before each use of the mould to avoid the substrate fusing. They can be used with a variety of different substrates, which makes them highly versatile.

• Composite - A composite mould release agent is especially designed for composite substrates.

Considerations when choosing a release agent

• The substrate being used - This is especially true of composite materials as the correct composite release agent will have to be used depending on the substrate being moulded. Using the wrong release agent could mar the finished workpiece or damage the mould if the substrate fuses.

Release agents jargon buster

We want to make it easy for you to shop our range of release agents, so we've outlined some key terms to ensure you make an informed purchasing decision.

What is a composite substrate?

In simple terms, a composite substrate is a material or object that is made up of two or more constituent materials. Examples of this are fibreglass or polymer concrete.


What are release agents used for?

Release agents can be used to release a host of moulded and cast substrates, from rubber and plastics through to metal and concrete.

Are release agents flammable?

Some release agents especially those that contain solvents are flammable, in this instance these types of release agents should be kept away from sources of ignition and high temperatures.