PlatSil® 71-30 Silicone Rubber

platsil-71-30PlatSil® 71-30 is a 1A:10B mix, mid-range hardness, platinum silicone liquid mold rubber. Molds made from this rubber offer long library life, no shrink on cure, high strength and high chemical resistance.

Molds made with this rubber are excellent for resin casting (e.g., polyurethane, polyester, epoxy), foam casting, soap and candle making, taxidermy, prototyping applications, hobby reproduction, and more. Release agents are not necessary for most casting materials.

PlatSil 71-30 can be poured as supplied or thickened for brushing using PlatThix liquid thickener.



Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
1A:10B A30 60 min. Light Green 25,000 cP 24.7 in³/lb 24 hr.
Accessories: PlatThix Liquid Thickener, PlatSil® 71/73 Part R Retarder, Silicone Fluid 50cs, PlatSil® 71/73 Part X Accelerator


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

Video Tutorials on YouTube: Resin Casting (with a barrier coat) in a PlatSil® 71-30 Mold

For other 71-Series video tutorials, visit the 71-Series page or the Polytek YouTube Channel.


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