PlatSil® 73-60 Silicone Rubber

platsil-73-60PlatSil® 73-60 is a 1A:10B mix, platinum silicone liquid mold rubber. With a Shore hardness of A60, it is the hardest Polytek® platinum silicone rubber currently available. Molds made from this liquid rubber provide long library life, high-performance, great chemical resistance, dimensional stability, and no shrinkage on cure.

PlatSil 73-60 molds are great for resin casting (polyurethane, polyester, epoxy) and foam casting and do not require the use of release agents in most cases. The hardness and tensile strength of this cured rubber also make it a great option for casting foam.

Molds made from this rubber are often used for prototyping, model making, high density polyurethane foam casting, and much more. It is a very popular rubber for casting foam architectural millwork, plaques and other foam décor items.

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 A60 45 min. Blue 40,000 cP 21.3 in³/lb 16 hr.
Accessories: PlatThix Liquid ThickenerPlatSil® 71/73 Part R RetarderSilicone Fluid 50csPlatSil® 71/73 Part X Accelerator


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

Video Tutorials: For 73-Series video tutorials, visit the 73-Series page or the Polytek YouTube Channel.


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