Silpak RU-435TH

Silpak RU-435TH is a two-component, 100% solids Urethane Elastomer RTV that becomes thixotropic within minutes for creating thin, brush-on bladder molds within hours. Once cured, this urethane RTV provides a strong, durable mold with excellent tear strength. Use to create thin, flexible molds for easier de-molding or use to cut mold cost through minimizing material usage. Applications include mold making for the art, architectural, and foundry industries. Note: A Mother Mold, usually made of plaster, fiberglass or Trowel-On 60 (Thixotropic Plastic), is used to help support thin bladder mold.

Polymer Name: Polyurethane Thermoset Elastomer (unspecified)

Features: Easy Formulation, Enhanced Tear Resistant, High Elongation, Long Seal Life, Thixotropic

Technical Data Sheet

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Applications & Uses

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Color (Comp A)Yellow/clear--
Color (Comp B)Gray--
De-mold Time (Reactivity)44259hrs-
Full Cure (Reactivity)12hrs-
Elongation 695%ASTM D-638
Gel Time (Reactivity)15 – 20 min-
Mix Ratio, by weight or volume (Comp A)100--
Mix Ratio, by weight or volume (Comp B)100--
Mixed A/B (Comp A)450000--
Recoat Time (Reactivity)30 – 60 min-
Hardness35Shore A-
Tear Resistance8psiASTM D-624
Tensile Strength406psiASTM D-638
Viscosity (Comp A)1000cps-
Viscosity (Comp B)1000cps-

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.