My Account
Shopping Cart

Sika 90923 Sikaflex 291 Marine Polyurethane Adhesive Sealant Black 10.3oz

Manufacturer

Sika

<h3>About Sika: Over a Century of Bonding &amp; Sealing Innovation</h3><p>Founded in 1910 by Kaspar Winkler in Baar, Switzerland, <strong>Sika AG</strong> has grown from a regional chemical manufacturer into one of the world's foremost specialty chemicals companies. With more than 100 years of experience, Sika is a worldwide innovation and sustainability leader in the development and production of systems and products for commercial and residential construction, as well as the transportation, marine, automotive, and renewable energy manufacturing industries. Sika has offices in 103 countries with over 400 manufacturing facilities and more than 33,000 employees worldwide.</p><p>Founded in Switzerland over 100 years ago, Sika has developed into a technology leader for adhesives, sealants, and acoustic applications, tooling, and composite resins — with success founded on strategic core competencies across a vast range of applications with solutions for production, assembly, and repair. Whether you're a professional installer, a collision repair technician, or a dedicated DIYer, Sika's product ecosystem is engineered to meet demanding real-world performance requirements.</p><h3>The Sikaflex® Legacy: World-Leading Sealants &amp; Adhesives</h3><p>Sikaflex® is known as the world's leading brand for elastic one-component adhesives and sealants based on polyurethane (PU) or silane-terminated polymer (STP). Sikaflex® all-in-one sealants have been the choice of the transportation industry globally for interior and exterior sealing, bonding, and waterproofing applications for more than 40 years. The Sikaflex® platform spans everything from body-shop repair and windshield bonding to marine caulking and RV sealing — making it one of the most versatile adhesive sealant families on the market.</p><p>A key part of the Sikaflex® story is its <a href="/13792-sika-caulks-sealants-201788">caulks &amp; sealants</a> lineup. Backed by unrivalled expertise with automotive applications, the advanced Sikaflex® portfolio of one-component adhesives and sealants has been specifically designed to provide a fast, easy solution in the automotive car body repair process. They are safe to use — not only by professionals but also by DIY enthusiasts — as they are free of isocyanates and other hazardous substances.</p><h3>Sika Primers: The Foundation of a Lasting Bond</h3><p>Even the best sealant is only as good as its surface preparation. That's where Sika's dedicated line of <a href="/13792-sika-primers-200810">primers</a> comes in. Sikaflex primers are special materials formulated to improve the bond of Sikaflex urethane sealants when applied to specific substrates. Sikaflex® Primer-260, for example, promotes adhesion of urethane sealants to various metallic, non-metallic, and plastic substrates. Pairing a Sika primer with the appropriate Sikaflex® sealant is a best-practice approach trusted by professionals in automotive, marine, and construction industries alike.</p><h3>Sika for Marine &amp; Composite Repair</h3><p>Sika Marine offers a full line of repair solutions that can be used by repair technicians and conscientious DIY boat owners — including marine sealant and adhesive products for numerous repair applications, as well as products for use in composite repairs. This commitment to marine customers extends to <a href="/13792-sika-fiberglass-aluminum-repair-kits-201958">fiberglass and aluminum repair kits</a>, where Sika's expertise in elastic bonding and chemical formulation translates directly into durable, weather-resistant repairs. Suitable for all construction materials — whether fiberglass, aluminium, or steel — Sika's comprehensive range of marine products meets all your caulking, levelling, bedding, sealing, and bonding requirements.</p><h3>Why Professionals Trust Sika</h3><ul><li><strong>Proven Technology:</strong> The knowledge Sika has acquired through OEM partnerships translates directly into the technologies developed for the aftermarket business, making Sika the leading brand for windshield replacement adhesives.</li><li><strong>Broad Substrate Compatibility:</strong> Sikaflex® all-in-one adhesive sealants bond well to a large variety of materials without primer, offering unique strength and long-lasting durability.</li><li><strong>Safe Formulations:</strong> Many Sika products are free of isocyanates, phthalates, solvents, and silicones — making them safer for professional and DIY use alike.</li><li><strong>Global R&amp;D:</strong> The core of Sika's business is innovation management and the focus on developing quality products and the best solutions for customers.</li></ul>

Part Number

90923
06/21/2036 6:50 AM
Sale Price

$9.78

In Stock (10+)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Sikaflex 291 is a premium one-component polyurethane-based adhesive and sealant specifically engineered for marine applications. This fast-curing, low-viscosity formula creates a medium-modulus, flexible bond that withstands the harsh marine environment including constant exposure to water, salt, and UV rays.

Key Features:

  • Single-component formula requires no mixing—ready to use straight from the cartridge
  • Fast cure time minimizes downtime for repairs and installations
  • Low viscosity allows easy application and excellent tooling characteristics
  • Medium modulus provides optimal balance between strength and flexibility
  • Excellent adhesion to a wide variety of marine substrates including fiberglass, wood, metals, and many plastics
  • Superior resistance to saltwater, fresh water, UV radiation, and weathering
  • Maintains elasticity through temperature extremes and joint movement
  • Black color provides clean, professional appearance

Common Applications:

  • Sealing and bonding deck hardware and fittings
  • Through-hull fittings and port lights
  • Hatch seals and ventilators
  • Windshield and window installations
  • General above and below waterline sealing
  • Marine equipment mounting

Sikaflex 291 is the trusted choice of boat builders, marine fabricators, and boat owners worldwide for reliable, long-lasting seals and bonds. The 10.3 oz cartridge fits standard caulking guns for convenient application.

Products specifications

Color

Black

Size

10.3 oz. cart.

easy

GOOD

simple instructions

greaat price

the price is great i hope it is the wright plugin

Ok

The price was the best, although we didn't expect the $8.00 shipping cost, since we were foretold it would be less than $3.00.

Easy site to navigate great prices fast shipping

I found exactly what I needed and it went very smoothly.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy