Sikaflex 291i 70ml

Multifunctional adhesive sealant for marine applications

Sikaflex-291i is a non-sag 1-component polyurethane sealant specifically developed for the marine market, which cures on exposure to atmospheric moisture. Sikaflex-291i meets in addition the low spread of flame requirements set out by the International Maritime Organisation (IMO).  

• Wheelmark approved
• 1-component formulation
• Highly elastic

Sikaflex 291i 70ml Features:

• Wheelmark approved
• 1-component formulation
• Highly elastic
• Low odour
• Non-corrosive
• Can be painted
• Bonds well to a wide variety of marine substrates
• Solvent free
• Very low VOC
• Low isocyanate content

Usage - Sikaflex-291i is a multipurpose product used in marine constructions. It is suitable for making elastic, vibration-resistant joint seals, and can also be used for a variety of interior sealing applications. Sikaflex-291i bonds extremely 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.). Sikaflex-291i must not be used to seal plastics that are prone to stress cracking (e.g. PMMA, PC, etc.). This product is suitable for experienced professional users only. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility. 

Sikaflex 291i 70ml Application Information:

• Surface preparation - Surfaces must be clean, dry and free from grease, oil and dust.
• Surface treatment depends on the specific nature of the substrates and is crucial for a long lasting bond. Suggestions for surface preparation may be found on the current edition of the appropriate Sika Pre-Treatment Chart. Consider that these suggestions are based on experience and have in any case to be verified by tests on original substrates.
• Application  - Sikaflex-291i can be processed between 10C and 40C but changes in reactivity and application properties have to be considered. The optimum temperature for substrate and sealant is between 15C and 25C.
  Sikaflex-291i can be processed with hand, pneumatic or electric driven piston guns. 
• Tooling and finishing - Tooling and finishing must be carried out within the skin time of the sealant. Finishing agents must be tested for suitability and compatibility prior to use.
• Removal - Uncured Sikaflex-291i can be removed from tools and equipment with Sika Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin have to be washed immediately using a suitable industrial hand cleaner and water.
  Do not use solvents on skin!
• Overpainting - Sikaflex-291i can be best painted after formation of a skin. Painting could be improved by treating the joint surface with Sika Aktivator-100 or Sika Aktivator-205 prior to paint process. If the paint requires a baking process (> 80C), best performance is achieved by allowing the sealant to fully cure first. All paints have to be tested by carrying preliminary trials under manufacturing conditions.
  The elasticity of paints is usually lower than that of sealants. This could lead to cracking of the paint in the joint area.