The new engineering materials powerhouse

by SpecialChem

RU-420 A/B

Technical Datasheet | Supplied by Silpak

RU-420 A/B by Silpak is a soft, two-component, 100% solids urethane RTV elastomer. Possesses low viscosity, high flexibility, high elongation and stretch properties. Offers high tear resistance, low durometer and easier demolding (16-24 hours) of highly undercut parts. Suitable for making molds or rubber parts. Designed to cast concrete, plaster and wax parts. It is available in a mixed ratio of 50:100 by weight. Shelf life of RU-420 A/B is 6 months at 65-85°F.

RU-420 A/B Properties

Physical Properties

Value & Unit

Test Condition

Test Method

Viscosity (Component A)

2000 cps

Viscosity (Component B)

1000 cps

Gel time

20 min

Want to list or
update your products?

View the listing options

Want to report errors or
suggest improvements?

Send a Feedback