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Dowsil 791 Weatherproofing SealantVendor:
Dowsil 791 is a high-performance, one-part neutral-cure silicone weatherproofing sealant formulated for expansion, connection, and perimeter joints in curtain wall and façade applications. With ±50% movement capability and excellent UV/weather resistance, it bonds strongly to glass, aluminium, masonry, and metal substrates without primer on most surfaces. Available in multiple colours, it’s a go-to solution for glazing professionals and façade contractors.- From $14.97
- From $14.97
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Dowsil 795 Silicone SealantVendor:
Use DOWSIL™ 795 Silicone Building Sealant for both structural glazing and weather sealing applications. It offers ±50% joint movement capability and meets ASTM C 1184 for structural use, with proven non-staining performance on masonry.
- From $20.22
- From $20.22
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Dowsil 888 Silicone Joint SealantVendor:
Use DOWSIL™ 888 Silicone Joint Sealant for sealing concrete pavement joints, handling up to +100% / -50% movement with unprimed adhesion, and resisting weather and UV exposure.
- From $19.40
- From $19.40
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Dowsil 890-SL Silicone Joint SealantVendor:
Use DOWSIL™ 890-SL for sealing concrete to concrete and concrete to asphalt pavement joints. This self-leveling, ultra-low modulus silicone requires no primer on concrete or asphalt, tolerates +100%/-50% movement, and achieves skin-over in under an hour to minimise traffic disruption.
- From $31.07
- From $31.07
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Frequently Asked Questions
Which DOWSIL for weatherproofing curtain walls?
791 weatherproofing sealant. It carries high movement in weather seals and stays UV stable for the life of the facade. Wipe the joint with solvent on a lint-free cloth and let it flash off first.
What is the difference between 795 and 791?
795 is a structural and general building silicone bonded into glazing systems; 791 is the weather-seal grade for joints that move and wash with weather.
Which silicone in bathrooms and wet areas?
890 SL sanitary joint sealant. It carries fungicide for showers, vanities, and clinical areas, and cleans without dulling. Wipe the joint with solvent on a lint-free cloth and let it flash off first.
Is 888 still the glass silicone?
Dow Corning 888 remains the go-to glass-to-glass and glazing channel silicone, bonding clear and staying elastic with thermal movement. Wipe the joint with solvent on a lint-free cloth and let it flash off first.
Do DOWSIL products need primer?
Most glass, anodised aluminium, and glazed surfaces bond unprimed. Prime porous masonry and some plastics per the data sheet before jointing. Wipe the joint with solvent on a lint-free cloth and let it flash off first.