Polyurethane adhesive sealant SIS 440
teak deckcaulking

polyurethane adhesive sealant
polyurethane adhesive sealant
polyurethane adhesive sealant
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Formulated for
teak deck
Other characteristics


SIS440 Caulk is the proven leader in the marine industry and was developed specifically for teak deck seams. It is a onepart, paste-like neutral cure formulation and when exposed to moisture in the air, it reacts to form a tough, flexible solid rubber compound. The sealant does not sag during cure, and has excellent temperature stability and chemical resistance once cured. Because the sealant is neutral cure, it is non-corrosive to all substrates. Experience More than 50,000 decks manufactured and installed in 35 years; 166 miles (267 km) of caulked seams per year. Well-tested and proven in hot or cold climates. Used by boat builders, boat repair yards, marinas, private boat owners, cruise ships, and ship chandleries. One-Part Silane Polymer Forms a solid rubber compound with highest rated UV resistance; excellent resistance to chemicals; superior temperature stability. Cures to provide better adhesion, longevity and appearance as compared to polysulfide, polyurethane and MS polymers. Neutral Cure Non-corrosive to all substrates; no damage to the surrounding environment/structures Viscosity Thixotropic paste which does not drip or sag; easy to work because it stays flexible. Primer-free One-step process saves application time; no solvents; environmentally friendly; safe for work environment. Cure Time Black – Ready for sanding after a minimum of 48 hours at 68°F (20°C). This is based on seams ¼”x¼” (6.4 mm x 6.4 mm), larger seams may require additional time. White & Gray – May take 8-12 days to fully cure (see “White and Gray Caulking: Installation Guidelines and After-Care Suggestions”) Potentially decreases turnover time for projects.


*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.