Dow Corning
Dow Corning 4045040 Silicone Sealant 10 oz Cartridge Red Hi-Temp
Red high-temperature silicone sealant in a 10 oz cartridge withstands -40 °F to 500 °F, cures in one day and stays flexible with 500 % elongation
- High-temp resistance up to 500 °F for demanding sealing jobs
- Flexible bond with 500 % elongation handles joint movement
- UV resistance protects outdoor seals from sunlight degradation
- Low 34 g/L VOC content meets strict air-quality standards
- Works on concrete, metal, glass, wood and more versatile substrates
High-Temperature Silicone Sealant
DOWSIL 4045040 is a red silicone sealant supplied in a 10 oz cartridge for automotive and industrial use. It withstands continuous temperatures up to 500 Degrees F and remains flexible down to -40 Degrees F. The formula cures fully in one day and offers 500 percent elongation for durable joints.
Replaces Standard Caulks in Heat Zones
Switch from generic acrylic or latex caulks when sealing HVAC ducts, electrical enclosures or engine-adjacent components that exceed normal temperature limits. The upgrade is worth it whenever the joint must survive thermal cycling without cracking or losing adhesion to metal, glass or masonry.
Cartridge Application With Standard Gun
Apply with any standard caulking gun; the 10 oz cartridge fits common frames and the one-day working time allows tooling before skin formation. Surfaces must be clean, dry and free of oil for adhesion. The product is restricted from sale in certain states, so verify local regulations before purchase.
Highlights
- High-temp resistance up to 500 °F for demanding sealing jobs
- Flexible bond with 500 % elongation handles joint movement
- UV resistance protects outdoor seals from sunlight degradation
- Low 34 g/L VOC content meets strict air-quality standards
- Works on concrete, metal, glass, wood and more versatile substrates
Specifications
| Brand | DOWSIL |
|---|
Questions about this item
What size caulk gun fits the 10 oz cartridge?
A standard 10 oz cartridge gun accepts this tube; load it by cutting the nozzle tip and puncturing the inner seal before squeezing.
How do I apply the sealant so it cures properly?
Clean and dry the surface, cut the nozzle to the bead size needed, apply a continuous bead, tool it within the 1 day working time, then let it cure fully for 1 day.
When should I plan to replace the sealed joint?
The silicone stays flexible at 500 percent elongation and resists UV and temperatures from -40 °F to 500 °F, so replacement is only needed if the joint is damaged or the substrate fails.
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