Polygel® Spray 35 Rubber

polygel-spray-35Polygel® Spray 35 is a Shore A35, 1A:1B mix, spray-on, polyurethane liquid mold rubber designed for making thin, stretchy, flexible molds of larger, complex originals. When low-viscosity Part A and Part B are mixed using a portable Plas-Pak sprayer or more sophisticated spray equipment, the mixture self-thickens to a creamy consistency ideal for quickly creating blanket or glove molds of complex objects.

Great for casting plaster, concrete, as well as resins and foams with suitable releases. Polygel Spray rubbers allow molds to be made in one application.

For a self-thickening brush-on rubber for smaller mold making projects, consider Polygel 35 Brush-On Rubber.

NOTE ON FOUNDRY WAXES: Certain foundry waxes can cause excessive oiling in Polygel rubbers; this is the case when liquid Polygel is applied to the foundry wax and when the foundry wax is poured into cured Polygel molds. Perform a small test cure to ensure compatibility.


Mix Ratio Shore Hardness Pour Time Cured Color Mixed Viscosity Specific Volume Demold Time
1A:1B A35 8-10 min. Light Blue/Varies Medium Thixotropic 27.5 in³/lb ~16 hr.
Accessories: PolyColor Dyes, Tietex® Fabric, Poly Purge Aerosol Dry Gas


Product Literature: Technical Bulletin | Safety Data Sheets | Physical Properties Bulletin | Sealers & Release Agents Selection Guide


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