291 Medium Strength Adhesive Sealant

A multifunctional adhesive sealant specifically designed for marine applications, Sikaflex-291 is an economical, medium-strength polyurethane-based sealant.

Specifically engineered for the marine environment, Sikaflex-291 is a non-sag, single-component sealant that cures on exposure to atmospheric moisture.

It's an all-purpose product used for general sealing applications such as deck hardware and equipment.

It is resistant to weathering, saltwater and ultra-violet radiation, but will yellow if exposed to the sun.

When speed is important! Sikaflex®-291 is used by many marine pros and DIYers for its fast cure time and excellent adhesion.

Want to use above and below water? No problem.

Sikaflex 291 marine adhesive and sealant provides excellent adhesion, fast strength build-up, and is paintable and sandable. Use what the pros use!

Sikaflex®-291 bonds well to the materials commonly used in marine construction like wood, metals, metal primers and paint coatings (2-C systems), ceramic materials and plastics (GRP, etc.).

Do not use Sikaflex®-291 to seal plastics that are prone to stress cracking (e.g. Plexiglas, Polycarbonate, etc.).

Once cured, Sikaflex®-291 can easily be sanded as required.

Sikaflex-291's permanent elasticity and medium strength, make for relatively easy disassembly, should that be necessary; use razor wire as a tool.

Now available in small tubes.

• Use above or below the waterline

• NSF & USDA approved for potable water

• Low viscosity - easy to gun

• Paintable, sandable, tools with soapy water, and skins over fast (60-90 minutes)

• Use soapy water (never alcohol) to tool polyurethane sealants or adhesives

• Bonds very well to itself and other cured polyurethanes

• For use with bare aluminum or stainless steel prep, with Sika Cleaner 226

• Vibration resistant

• Low odor

• If you require Sikaflex-291 in gray, we recommend you use the very similar Sikaflex-221 Gray; see Related Products, below

• The 10.3 oz cartridge is used with a caulking cartridge gun and the 3 oz is a squeeze tube, no cartridge gun required.