DOWSIL 791
DOWSIL 791 Weatherproofing Sealant is a one-part, low-modulus silicone for weathersealing joints on masonry, concrete, glass and metal. Its high movement capability handles the expansion and contraction of exterior joints, and it cures neutral so it will not corrode sensitive substrates. A go-to perimeter and expansion-joint sealant.
Made by Dow
Dow is a global leader in silicone production, with products for a wide array of applications including kitchen and bath, structural glazing, and elastomeric coatings. Look to Dow (DOWSIL) for solutions to the most demanding silicone situations.
Where this product fits
- Stocked at or transferred between all six branches
- Volume pricing by the case or pallet
- Product specialists to confirm fit for your application
Other silicone building sealants we carry
Same type of product from other manufacturers, all supplied through our branches. Our specialists can help match movement capability, colour and substrate.
Tremco Spectrem 2
Tremco Spectrem 2 is a one-part, neutral-cure structural and weatherseal silicone rated for high joint movement on demanding curtain-wall and precast facades.
View productTremco Tremsil 400
Tremco Tremsil 400 is a one-part, neutral-cure silicone that bonds to a wide range of porous and non-porous substrates without priming.
View productDifferent chemistry, same job
These are often specified for similar applications. Check the data sheet or ask your branch to confirm they suit your joint.
Supra Expert
Supra Expert is Mulco’s professional exterior sealant, built for Canadian temperature swings with strong adhesion and lasting flexibility on windows, doors and siding.
View product
Nuflex 180
Nuflex 180 is a versatile, painter-friendly sealant from Canadian manufacturer Nuco, used across interior finishing and general construction sealing.
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Sikaflex NP1
NP1 may be the most recognized name in single-component polyurethane sealants: gun-grade, elastomeric and adhered to nearly everything on a construction site.
View productNot sure which sealant fits your joint? Tell us the substrates, joint size and expected movement and a product specialist will recommend one.
Ask a specialist