Clear Polyester Mass Casting Resin S41 Gallon Kit

A polyester resin promoted for ambient temperature cure with MEK peroxide. It is used to produce medium to large size castings with exceptional clarity. SIL95BA-41 was designed to reduce cracks in larger castings with a long cure time, low peak exotherm, and minimal shrinkage.

The ratio for mixing polyester resin with a hardener, such as MEKP (methyl ethyl ketone peroxide), is typically between 1% and 2.5% hardener to resin by weight: For Working times of between 10-20 min max thickness 1"

Summer: Use 1% hardener to resin for maximum wetting time 

Winter: Use 2% hardener to resin (Please note this ratio is temperature sensitive and should not be used in warm environments)