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BOSS® 238 is a high-quality, neutral, elastic, one-component adhesive sealant for bonding and sealing in the automotive and transport industries based on Hybrid Polymer.


  • Can be painted with water-based systems, industrial varnishes, and coatings.
  • Easy to use and apply under difficult circumstances.
  • Excellent adhesion on nearly all surfaces, even if slightly moist.
  • Fast cure.
  • Free of isocyanates, solvents, halogens, and acids.
  • Good weather and UV resistance.
  • High elasticity – movement accommodation up to ±20%.
  • No bubble formation within sealant in high temperature and humidity applications.
  • Short open time.
  • Excellent mechanical characteristics.


  • Elastic structural bonding in automotive applications: buses, trains, trucks, caravans, or trailers.
  • For use in elastic structural bonding applications where a tough and rigid bond is required.
  • Joints between metal plates.
  • Structural bonding constructions that are prone to vibrations.


Available in black.


Available in standard 600 ml sausages.


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