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Silpak RU-455

Silpak RU-455 is a liquid, two-component, 100% solids Urethane Elastomer RTV that is easily processed. This system provides a firm, semi-flexible, durable and abrasion resistant rubber compound. Use for creating molds, especially large molds where dimensional stability is required to avert distortion, and rubber parts. Molds are used to cast concrete, wax, and plaster parts. Also makes molds that are compatible for casting Silicone Platinum RTV.

Polymer Name: Polyurethane Thermoset Elastomer (unspecified)

Features: Abrasion Resistant, Dimensional Stability, Durable, Flexible, Good Elongation, Low Shrinkage, Rapid Cycle Time, Tear Resistance

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Technologies

Features & Benefits

Unique Characteristics
  • Easy to Process with 1-1 Mix Ratio
  • Dimensionally Stable—Minimal Shrinkage
  • Excellent Strength Properties—High Tear Resistance

Applications & Uses

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Color (Comp A)Yellow/Clear
Color (Comp B)Amber
Cure Time (Reactivity)12-16 Hours
De-mold Time (Reactivity)2-4 Hours
Coverage27in3/lb
Elongation480%ASTM D-638
Gel Time (Reactivity)10min
Mix Ratio, By Weight (Comp A)100
Mix Ratio, By Weight (Comp B)100
Hardness55Shore A
Specific Gravity1.05
Tear Resistance130pliASTM D-624
Tensile Strength406psiASTM D-638
Viscosity (Comp A)5000cps
Viscosity (Comp B)4000cps

Safety & Health

Handling and Safety

Use proper equipment—gloves, glasses and apron when using materials. Avoid direct contact with skin and eyes. If skin contact occurs, clean area with waterless hand cleaner or isopropyl alcohol. For eye contact, flush eye with water for 15 minutes and call physician. Use materials under adequate ventilation.

Packaging & Availability

Pacakaging
  • Pint Kit (2 lbs)
  • Qrt Kit (4 lbs)
  • Gal Kit (16 lbs)
  • 5 Gal Kit (80 lbs)

Storage & Handling

Storage/ Shelf Life

A and B components must be stored in their original, unopened containers at temperatures between 65F and 85F. Shelf life of materials when kept in unopened sealed containers, at the recommended storage conditions, is 6 months. Containers should not be opened until ready for use. Once containers are opened, material should be used in a short time period. Pre-test any aged material before using. Molds or parts should be cleaned with a soap solution and completely dried prior to storing them in a dry, cool environment. Avoid stacking or exposing them to environmental elements—UV and moisture.