
Tremco 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. It offers strong movement capability for perimeter and expansion joints while resisting weathering and UV. A versatile choice when substrate compatibility is uncertain.
Made by Tremco
Tremco manufactures sealants, air barriers, waterproofing membranes, traffic coatings, glazing system components and more for the construction and restoration of structures, from parking garages, stadiums and high-rises to single-family homes, hospitals and schools. Their products also serve the modular, window and door, industrial and manufacturing markets.
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
Technical documents
Download the current technical data sheet for Tremco Tremsil 400.
Data sheet (PDF)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.

DOWSIL 795
DOWSIL 795 is one of the most specified silicone building sealants in North America, equally at home in structural glazing and weatherproofing joints.
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DOWSIL 790
With ultra-low modulus and exceptional movement capability, DOWSIL 790 handles the joints other sealants tear away from, including EIFS interfaces and high-movement expansion joints.
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DOWSIL 758
DOWSIL 758 is formulated to seal directly against building wrap, air barrier membranes and painted metals that give general-purpose silicones trouble.
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DOWSIL CWS
CWS stands for Contractors Weatherproofing Sealant, and that is its whole personality: a dependable, economical silicone for perimeter joints, panel joints and general weatherseal work.
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DOWSIL CCS
DOWSIL CCS (Contractors Concrete Sealant) is built for the tough adhesion and movement demands of concrete and masonry joints, including paving and precast panels.
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DOWSIL 732
DOWSIL 732 Multi-Purpose Sealant is the versatile neutral-cure silicone crews reach for on general sealing, glazing and weatherproofing.
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.
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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