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Polysil® Hi-Temp

1 of 2 products in this brand
POLYSIL HI-TEMP is a one-part silicone sealant that provides a long lasting, flexible seal with excellent adhesion to most surfaces. POLYSIL HI-TEMP cures in the presence of atmospheric moisture. There is little change in gunability at temperatures ranging from -80ºF to 600ºF.

Product Type: Elastomeric Sealant

Application Area: AC Ducts, HVAC Ducts

Compatible Substrates & Surfaces: Glass, Metal

Cure Method: Moisture Cure

Application Method: Gun

Chemical Family: Silicones

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Features
  • Permanently flexible, 25% movement capability
  • Excellent mold & mildew resistance
  • Will not crack, shrink or chalk
  • Excellent for high-temperature applications

Applications & Uses

Application Area
Application Method
Compatible Substrates & Surfaces
Cure Method
Recommended Uses

POLYSIL HI-TEMP is extremely well suited for non-porous material like metal, glass, and applications requiring high temperature resistance. It can be used in industrial assembly, exhaust stacks, ducting and other high heat applications.

Application Instructions

Prior to application, clean and dry the surface remove all dirt, oil, grease, and foreign matter. Trim nozzle to obtain desired angle and bead size. Puncture inner seal. Apply with a caulking gun, forcing sealant into the joint. Seal unused portion with cap. Clean off excess sealant with solvent.

Clean Up
  • Use solvents
Coverage Rate

31 linear ft. using 1/4" bead.

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Tack Free Time (77º, 50% RH)max. 1h
Curing Time (77ºF, 1/4" bead)5 - 7days
Hardness23.0Shore ADurometer
Tensile Strength245.0psi
Peel strength20.0ppi
Dynamic Joint Movement25.0%
WeatherabilityExcellent

Regulatory & Compliance

Specification Compliance

Meets and exceeds Federal Specification MILA-46106, TT-00230C, TT-S-001543A, ASTM C-920, CAN-19, 13-M82; NSF and USDA approved. Meets FDA 21 CFR 177.2600 when properly cured.

Packaging & Availability

Packaging
  • 10.3 oz. tubes
  • 40 lb Pail
  • 441 lb. drum

Storage & Handling

Temperature Limits

Storage: max. 100°F

Application: -80°F - 140°F

Service: Up to 450ºF for extended periods 600ºF for shorter periods

Shelf Life

18 months in unopened containers.