Polytek PolyFoam R-5 Rigid Casting Foam 5 lb/ft3 (16lb Kit)

PolyFoam R-5 is a two-part, rigid polyurethane casting foam. This self-skinning foam has a free-rise density of 5 lb/ft³, but should be cast at a density of 8 to 20 lb/ft³ to achieve good surface detail and mold fill. Generally, PolyFoam products should be cast in TinSil or PlatSil silicone molds. Barrier coats (e.g., a fast-drying primer paint) can be applied to silicone molds before casting foam in order to produce pre-primed parts right out of the mold. These foams can also be poured into Poly 74 & 75-Series polyurethane rubber molds that have been coated with PolyCoat Sealer & Release Agent.

• Mix Ratio: 1A:1B
• Cream Time: 45 sec.
• Rise Time: 2 min.
• Tack-Free Time: 3 min.
• Demold Time: 10-15 min.