The Everkem Diversified Products TruSil HTS High Temperature Silicone Sealant handles extreme heat applications up to 500°F continuous service and 600°F intermittent. This red silicone sealant comes in a 10.1 oz cartridge and meets ASTM C920 requirements for structural glazing and weathersealing. The sealant maintains flexibility down to -55°F and accommodates +/- 25% joint movement.
This NSF-51 certified sealant works in food processing facilities and meets FDA 21 CFR 177 regulations for incidental food contact. The formula resists mold and mildew while maintaining low VOC content at 30 g/L. Federal specifications TT-S-00230C and TT-S-01453A validate its performance in demanding applications. Made in USA with EcoSeal environmental compliance, this silicone provides 50+ year durability in high-temperature installations.
Common applications include HVAC ductwork, industrial ovens, boiler connections, and food processing equipment where high heat and sanitary requirements intersect. The sealant works on metal, glass, and masonry substrates in both interior and exterior environments.
Technical Details
Key Specs
| Chemistry | Acetoxy-cure high-temperature silicone |
|---|---|
| Service temperature | 55°F to 500°F continuous; 600°F intermittent |
| Joint movement | ± 25% |
| Durability | 50+ years |
| Food-contact | NSF/ANSI-51 certified |
| VOC content | 30 g/L |
Full Specifications
Typical Uncured Properties
| Chemistry | Acetoxy silicone |
|---|---|
| Odor | Moderate acetic odor |
| Uncured state | Glossy paste |
| Application temperature | -25°F to 120°F (-31.7°C to 48.9°C) |
| Tooling time | 5 to 7 minutes |
| Full cure time | 24 to 48 hours (7 days for maximum strength) |
| Shelf life | 1 year |
Typical Cured Properties
| Cured state | Rubbery solid |
|---|---|
| ASTM C920 | Meets Standard Specification for Elastomeric Sealants |
| NSF/ANSI-51 | Certified for food-contact |
| Service temperature | 55°F to 500°F continuous / 600°F intermittent (12.78°C to 204.4°C continuous / 315.55°C intermittent) |
| Paintability | Non-paintable |
| Joint movement capability | ± 25% |
Curing conditions: 75°F (24°C) and 50% relative humidity.
Available colors: Red
Applications
- Stove and furnace vent pipes
- Oven and wood-stove window seals
- Industrial ovens
- Appliance trim
- Sealing and encapsulating heating elements
- Industrial bag filters on smokestacks
- High-temperature applications in and around food processing and storage
- Other sealing, bonding, and gasketing where parts must perform at high temperatures
Advantages
- 50+ year durability
- High-temperature performance (500°F continuous, 600°F intermittent)
- ± 25% joint movement capability
- NSF-51 certified for food contact
Limitations
- Not for prolonged water immersion
- Not for structural silicone glazing
- Not for porous surfaces such as masonry
- Non-paintable (paint does not adhere to silicone)
Compliance & Standards
CSI specified divisions
- 07 90 00 — Joint Protection
- 07 92 00 — Joint Sealants
- 22 00 00 — Plumbing
- 23 00 00 — Heating, Ventilating, and Air Conditioning (HVAC)
- 26 00 00 — Electrical
Applicable standards
- ASTM C920 — Standard Specification for Elastomeric Sealants
- NSF/ANSI-51 — Food Equipment Materials & Related Food Equipment Standards
- FDA & USDA requirements
- Federal Specs: TT-S-01543A, TT-S-00230C
EcoSeal (low-VOC) compliance
- V.O.C. Content: 30 g/L
- CDPH Standard Method / CA Section 01350 Emissions Testing for LEED v4 Compliance
Sizes & Part Numbers
| Part # | Description | Packaging | Color |
|---|---|---|---|
| HTS-100 | TruSil HT — 10.1 fl. oz. (298.7 mL) tube | 12 tubes/case | Red |
Equivalent Products from Other Brands
Switching brands? This Everkem product is a functional equivalent to the competitor SKUs listed below per Everkem’s published Product Cross Reference. Formulations, cure times, and exact specs vary by manufacturer — confirm your project’s spec requirements before substituting.
| Brand | Part Number | Product Name |
|---|---|---|
| Boss | 32612 | Boss 326 Hi-Temp Red Silicone |
| DAP | 08013 | Dap High Temp 100% Silicone Sealant |
| Oatey | 25666 | Hercules High Temp Red Silicone Caulk |
| Rectorseal | 57500 | Hi-Temp 100% Silicone Sealant |
| Red Devil | 08013 | 100% Heat Resistant Silicone Sealant |