HY-E640 Addition Curing Platinum Silicone Rubber 40 Shore A for Cement and Stone Molds
Summary: HY-E640 is a 40 Shore A addition curing platinum silicone for cement castings, stone moulds and heavy decorative parts.
Product Overview
A two component platinum cure rubber that stays firm in the mould. At 40 Shore A it supports heavy castings and keeps wide panels flat, while releasing from deep texture without tearing the edges.
Technical Specifications
HY-E640, 40 Shore A, parts A and B, mixed 1:1 or 10:1, translucent, -60C to 200C, packed in 1/5/20/25/200kg.
Product Features
Low shrinkage, high tear strength, stable hardness between batches, smooth flow into deep texture. Addition cure, so no by-products are released and the master is not attacked.

How to Use
Blend each part, weigh at the stated ratio, stir two to three minutes, degas, pour from one corner in a thin stream, set at room temperature or warm, then demould.
Application Scenarios
Cement castings, artificial stone moulds, decorative wall panels, planter and statue moulds.
Buyer Benefits
Heavy parts keep their shape, edge tearing drops, and repeat work stays predictable. Trials start at 10kg.
Certifications and Compliance
ISO9001, RoHS, REACH, FDA, UL and CE.
Customization Options
Hardness 10 to 50 Shore A, colour, mixing ratio and packaging are adjustable.
Production Process
Pre-production sample, batch retention for traceability, inspection before dispatch.
FAQ
Minimum order 10kg. Set time depends on temperature. Samples available.
