Frequently Answered Questions

Take a look through out most commonly answered questions and if you can’t find the answer you’re looking for, get in contact with us using the form at the bottom of the page.

What is an IMR?

An IMR ( internal mould release ) is added to the resin to facilitate release and prevent mould build up. For high temperatures and with metal moulds they can work without externally applied release, at lower temperatures normally used in conjunction with an externally applied release to greatly enhance performance

What is a semi-permanent?

Our Marbocote products are semi-permanent release agents, dry film, chemically inert, non-transferring, quick to apply, offer consistent performance & surface finish. Used extensively in the aerospace industry, and high volume production

How do we avoid de-wetting?

De wetting, fish eyes, or reticulation is caused by an excessive differential in surface tension of the wet resin or gel to the surface energy of the mould. We can advise & prevent this with appropriate product selection

Can I have a matt release agent?

Whatever anyone tells you the true answer is no, as a one off possible, as a reproducible production system no. Our Marbocote semi-permanent release agents or IMR systems will enable you to preserve & mould from a matt finish that is permanently on the moulding surface

Why is silicone an issue?

Silicone has the lowest surface energy on the planet, nothing can stick to it.

Unfortunately it readily transfers, can pollute with airborne particles, will make the work area a slip hazard, interferes with paint systems & bonding. Generally banned in the automotive industry it does nevertheless have its applications, and we have sold some from time to time

Mould coatings... are they a solution?

Unfortunately not a permanent solution, PTFE and the like are fragile, however chroming steel moulds, & nickel coating are good strong durable finishes for steel, but very costly

We have a Marbocote solution for rejuvenating & enhancing moulds which surpasses anything else on the market, easy to apply, totally impervious, very hard, a real world answer to tired & over repaired moulds

Importance of cleanliness

What goes on the mould if contaminated will end up on the moulding or influence the final surface finish. Cleanliness is vital

Can I change my release agent?

Yes, we have cleaning chemicals & procedures that allow seamless change over

How do I choose the correct release agent?

The correct choice for you will be determined by many factors such as process, speed, post mould considerations, mould material & temperature.

We spend a lot of time making sure our customers get it right first time, mould release is an essential rate determining step in your process & ultimately controls the quality of the end product, correct choice is vital

Why shelf life is important?

With reactive curing systems this is obvious, with blends they may separate with time especially at low temperatures. We have determined the conditions to ensure our products give optimum performance, they must be adhered to

Why use a polyester veil?

Polyester veils have no binder & so the same wet strength as dry, used for glassfibre isolation, corrosion barriers, osmosis reduction, aesthetic improvement, and surface bulking reinforcement. Generally used for filament winding, RTM,  & pultrusion

Can we produce accurate embedded images?

We have developed a durable printing system with our partners Colour It In exclusive to CRC for embedded images for all FRP processes, let us know what you need, warnings, logo’s, instructions, traceability, defined surface, our system is bespoke to your needs

Contact Us

The best way to get in contact with us is by sending a message - we'll get back to you as soon as we can.

CRC Ltd - 5, Cheltenham Mount, Harrogate, HG1 1DW, UK
Tel. +44 1423 569715  Fax. +44 1423 563384

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