Sika Sikaflex®-291 All-Purpose Marine Adhesive and Sealant

SKU: SKA 90919 CTG

Manufacturer Part #: 90919

Product Highlights

Sikaflex®-291 All-Purpose Marine Adhesive and Sealant Overview

Sikaflex®-291 is a high-performance sealant designed for various marine construction applications. It provides elastic, vibration-resistant seals, making it ideal for numerous interior sealing tasks. Sikaflex®-291 offers excellent adhesion to commonly used marine materials such as wood, metals, metal primers, paint coatings (2-C systems), ceramics, and plastics (GRP, etc.). Once cured, it can be easily sanded to meet your specific requirements.

Please note that Sikaflex®-291 is not recommended for sealing plastics susceptible to stress cracking, such as Plexiglas and Polycarbonate. 


  • Bonds well to a wide variety of substrates
  • Good aging and weathering resistance
  • Elastic
  • Low odor
  • Non-corrosive
  • Can be over painted
  • Can be sanded
  • Listed under NSF ─ Proprietary Substances and Nonfood Compounds


  • Series: Sikaflex®-291
  • Cartridge Size: 300 ml (10.1 fl oz)
  • Chemical Base: 1-Component Polyurethane
  • Color: White
  • Cure Mechanism: Moisture-Curing
  • Density (Uncured): 10.8 lb/gal (1.3 kg/l)    
  • Non-Sag Properties: Good
  • Application Temperature: 41 to 104°F (5 to 40°C) - Ambient
  • Skin Time: 60 Minutes @ 73°F (23°C) / 50% r.h.
  • Open Time: 45 Minutes @ 73°F (23°C) / 50% r.h.
  • Curing Speed: See Product Data Sheet
  • Shrinkage: 5%
  • Shore A Hardness: 40
  • Tensile Strength: 260 PSI (1.8 MPa)    
  • Elongation at Break: 500%
  • Tear Propagation Resistance: 6 N/mm (35 pli)
  • Service Temperature: -58 to 194°F (-50 to 90°C)
    • 4 Hours: 320°F (160°C)
    • 1 Hour: 356°F (180°C)
  • Shelf Life: 12 Months - Storage Below 77°F (25°C)

Other Package Sizes Available

3 oz tubes and 600 ml Unipacks available. Please contact us for more information.

Submit the form below to get the Technical Data Sheet (TDS) or Safety Data Sheet (SDS) for Sikaflex-291 Marine Adhesive and Sealant sent to your email address.

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