TinSil® 80-30 Silicone Rubber

tinsil-80-30TinSil® 80-30 is a 1A:10B mix ratio, tin-cured silicone with a mid-range hardness and a tough, snappy, high-tear cure.

Molds made from TinSil 80-30 are often used for casting polyurethane, epoxy and polyester resin, as well as foam, wax, soap, plaster, and more. Release agent is not required for most casting applications.

This rubber can be poured as is, or can be thickened with TinThix liquid thickening agent for brush-on molds.



Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
1A:10B A30 45 min. Peach 17,000 cP 23.7 in³/lb 24 hr.
Accessories: TinThix Liquid ThickenerSilicone Fluid 50csTinSil FastCat Accelerator


Product Literature: Technical Bulletin | Safety Data Sheets | Physical Properties Bulletin | Sealer & Release Agent Selection Guide

Video Tutorials on YouTube: How to Make a TinSil 80-30 Brush-On Mold with Mold Shell [Part I – how to make the mold]  |  How to Make a TinSil 80-30 Brush-On Mold with Mold Shell [Part II – mold shell construction, cutting the mold, rotational casting]


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