Silpak RU-448 Performance Polyurethane Rubber

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Silpak RU-448 Performance Polyurethane Rubber
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	RU-448 A/B is a 45 shore A hardness, polyurethane RTV elastomer that cures to a rubber material with excellent tear strength and abrasion resistance. It has a simple 1:1 mix ratio and low viscosity for easy processing. Features: Excellent tear resistance and elongation Easy to process Rapid mold cycle Applications: Applications include the following or any application where a flexible rubber part is required: Concrete texture and stamp pads Rubber molds and parts Concrete form liners Prototype rubber parts Information provided by Silpak a division of Polytek Development Corp.
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Physical Properties	Original Value	Comments

Specific Gravity	1.02 g/cc
Viscosity	3000 cP	Initial Mixed
Storage Temperature	64.0 - 86.0 °F

Mechanical Properties	Original Value	Comments
Hardness, Shore A	45
Tensile Strength	650 psi
Elongation at Break	800 %
Tear Strength	90.0 pli

Processing Properties	Original Value	Comments
Cure Time	16.0 hour @Temperature 22.8 °C	Demold
Gel Time	30.0 min
Shelf Life	6.00 Month

Descriptive Properties
Color	Yellow
Mix Ratio	1A:1B	by weight

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PSILPAK007 / 318644

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