Dow Corning
Dow Corning DOWSIL 99180523 Silicone Sealant 10 oz Cartridge Black 832
Multipurpose black silicone sealant in a 10 oz cartridge, flexible with 420% elongation, high-temperature resistant from -65°F to 300°F, UL 94 HB rated, 30 g/L VOC, 50 min working time.
- High-temperature resistance up to 300 Degrees F
- Remains flexible from -65 Degrees F to 300 Degrees F
- UL 94 HB flame rating for safety compliance
- Bonds concrete, fiberglass, glass, masonry, metal, plastic, wood
- 50-minute working time with full cure in 1 day
Black Silicone Sealant 10 oz Cartridge
DOWSIL 99180523 is a black silicone sealant supplied in a 10 oz cartridge for multipurpose bonding and sealing. It adheres to concrete, fibreglass, glass, masonry, metal, plastic and wood while remaining flexible after cure. The formulation meets UL 94 HB and contains 30 g/L VOC. Full cure is reached in 1 day.
Surface Prep and Application Window
Verify that each substrate is clean, dry and free of oil or loose particles before applying the sealant. The product provides a 50 min working time for tooling and adjustment. It performs continuously from -65 Degrees F up to 300 Degrees F. Cartridge format requires a standard caulking gun for dispensing.
Upgrades from Acrylic or Latex Caulks
This silicone replaces acrylic or latex caulks when joints need higher elongation and wider temperature resistance. The 420 Percent elongation accommodates movement that rigid caulks cannot absorb. The jump is worth it for exterior exposure, high-heat areas or substrates that expand and contract significantly.
Highlights
- High-temperature resistance up to 300 Degrees F
- Remains flexible from -65 Degrees F to 300 Degrees F
- UL 94 HB flame rating for safety compliance
- Bonds concrete, fiberglass, glass, masonry, metal, plastic, wood
- 50-minute working time with full cure in 1 day
Specifications
| Brand | DOWSIL |
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Questions about this item
What comes in the 10 oz cartridge and do I need a separate caulking gun?
The cartridge contains black silicone sealant; a standard 10 oz caulking gun is required and sold separately.
Should I choose the 832 formulation or a different DOWSIL grade for high-temperature metal seams?
Grade 832 is a multipurpose silicone rated to 300 °F and −65 °F, suitable for metal, glass, concrete and other listed surfaces.
How does the 420 % elongation and 50-minute working time affect a real repair joint?
The sealant stays flexible at 420 % elongation and gives you 50 minutes to tool the bead before it skins over, reaching full cure in one day.
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