Reaction Injection Moulding

When you need medium to large, durable, flexible (or rigid), lightweight parts with thin walls and intricate detailing, reaction injection moulding (RIM) provides a flexible and cost-efficient solution.

Unlike the more conventional thermoplastic process of injection molding, RIM utilises low-viscosity liquid polymers in thermoset processes. The polymers are injected into a heated mould, where they expand, thicken and harden. This process allows for fine detailing in design to be accommodated; and surface finishes are so good, part finishing times are drastically reduced. Moulds and tools can be created using reinforced silicones, epoxy resins, GRP, or machined from composite materials. The processes allow for over-moulding.

Using our RIM facility for producing high quantities of niche parts gives you access to an experienced team dedicated to delivering unrivalled levels of service and perfect parts on time, every time.


Metermix Par 50 (3 Machines)

100 Parts a day

2KM PGM101 (1 Machine)

100 Parts a day

Reaction Injection Moulding Materials


Semi-rigid polyurethane in black or beige. Suitable for high impact applications including, electrical, furniture and automotive.

MG321 FR

High heat resistance prototyping resin suitable for cladding, medical and automotive parts.

RG 53

Impact resistant resin with high temperature resistance. Suitable for thin-walled, complex structures.

R1059 + I1001

Medical grade high performance polymers.

Tomrim 5200