PolyFoam R-5 Casting Foam


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.


Current Stock:

Find a Distributor Adding to cart… The item has been added

Technical Specifications

Mix Ratio by Volume:
Mix Ratio by Weight:
Mixed Viscosity:
1,100 cP
Cream Time:
45 sec.
Rise Time:
2 min.
Tack-Free Time:
3 min.
Free-Rise Density:
5 lb/ft³
Molded Density Range:
8-20 lb/ft³
Demold Time:
10-15 min.

More Information

Material Calculator

Technical Bulletin

Safety Data Sheet - Part A

Safety Data Sheet - Part B

Kit Components
PolyFoam R-5 Components
4-lb kit includes: 2 lb of PolyFoam R-5 Part A (~1 quart)
2 lb of PolyFoam R-5 Part B (~1 quart)
16-lb kit includes: 8 lb of PolyFoam R-5 Part A (~1 gallon)
8 lb of PolyFoam R-5 Part B (~1 gallon)
80-lb kit includes: 40 lb of PolyFoam R-5 Part A (~5 gallons)
40 lb of PolyFoam R-5 Part B (~5 gallons)