PlatSil® 71-11 Silicone Rubber

platsil-71-11PlatSil® 71-11 is a fast-curing, soft (A10) platinum silicone liquid mold rubber with a 1A:1B mix ratio. Molds made from this rubber offer great flexibility for molding and casting complicated and intricate models with undercuts.

PlatSil 71-11 is often used to make molds for prototyping, model making, hobby reproduction, taxidermy, soap and candle making, and much more. Common casting materials include resin (e.g., polyurethane, epoxy, polyester), waxes and plaster. Release agents are not needed to cast most materials.

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

PlatSil 71-11 and 71-10 are the softest rubbers in the 71-Series & 73-Series. For a softer rubber, view the PlatSil® Gel Series rubbers.


Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
1A:1B A10 20 min. Blue-Green 6,000 cP 24.7 in³/lb 4 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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