PlatSil® 71-35 Silicone Rubber

poly-lite-castPlatSil 71-35® is a 1A:10B mix, mid-range hardness platinum silicone mold rubber. Molds made from this rubber offer dimensional stability, no shrink on cure, high strength and chemical resistance, and great release properties.

PlatSil 71-35 molds are often used for prototyping, model making, hobby reproduction, taxidermy, soap and candle making, and much more. Common casting materials include resin (polyurethane, polyester, epoxy), foams, plaster, wax and soap. Release agent is typically not needed to cast these materials.

Pour this rubber as supplied or thicken for brush-on molds using PlatThix liquid thickener.


Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
1A:10B A35 60 min. Blue 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: For 71-Series video tutorials, visit the 71-Series page or the Polytek YouTube Channel.

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