Silpak SP-328-4 Rigid Polyurethane Foam

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Silpak SP-328-4 Rigid Polyurethane Foam
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Silpak SP-328-4 urethane foam consists of two parts (A and B) that, after mixing, form rigid foam products with a molded density of 5-8 lb/ft³. These rigid foams can be used for casting parts or filling voids; consider SP-328-4 foam for production of decorative objects, lightweight mold shells, production parts, models, patterns, fixtures, duplicate masters and general tooling use. Features: Molded density of 5-8 lb/ft³. 1A:1B mix ratios by volume Suitable for casting parts and filling voids Applications: For production of: Decorative objects Lightweight mold shells Production parts Models Patterns Fixtures General tooling use Information provided by Silpak a division of Polytek Development Corp.
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Physical Properties	Original Value	Comments

Density	5.00 lb/gal	Free-Rise
	5.00 - 8.00 lb/gal	Molded
Viscosity	1000 cP	Mixed
Storage Temperature	60.0 °F

Processing Properties	Original Value	Comments
Cure Time	6.00 min	Tack-Free Time
	20.0 min	Demold Time
	60.0 sec	Cream Time
	180 sec	Rise Time
Shelf Life	6.00 Month

Descriptive Properties
Mix Ratio	112A:100B	by weight
	1A : 1B	by volume

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PSILPAK013 / 318650

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