PolyFoam F-5 Casting Foam


PolyFoam F-5 is a two-part, flexible 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 15 lb/ft³ to achieve good surface detail and mold fill. PolyFoams are useful for creating props, tools and any decorative, functional or artistic object which needs to be flexible and lightweight. These flexible foams should be cast into PlatSil® or TinSil® silicone rubber molds, but can be cast into polyurethane rubber molds that have been coated with PolyCoat Sealer & Release Agent.

WARNING: This product can expose you to chemicals including Butyl benzyl phthalate (BBP), which is known to the State of California to cause reproductive harm. For more information, go to www.P65Warnings.ca.gov


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Technical Specifications

Mix Ratio by Volume:
Mix Ratio by Weight:
Mixed Viscosity:
1,400 cP
Cream Time:
45 sec.
Rise Time:
5 min.
Tack-Free Time:
25 min.
Free-Rise Density:
5 lb/ft³
Molded Density Range:
8-15 lb/ft³
Demold Time:
30-60 min.

More Information

Material Calculator

Technical Bulletin

Safety Data Sheet - Part A

Safety Data Sheet - Part B

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