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BOSS® MS 40+ is a high-performance, one-component, hybrid polymer sealant. It takes the place of most traditional sealants and is designed to resist all on-the-road flexing and vibration. The product is fast curing and provides permanent elastic adhesion to most surfaces with excellent elasticity.



This product is available in clear.



Available in 290 ml cartridge, 600 ml sausage, and 250 kg drum packs.





  • Can be painted with water-based systems within 30 minutes.
  • Ecological advantages – free of isocyanates, solvents, halogens, and acids.
  • Excellent adhesion on nearly all surfaces, even if slightly moist.
  • Good colour stability, weather, and UV resistance.
  • Good extrudability even at low temperatures.
  • High elasticity.
  • Ideal for use on sensitive porous or non-porous substrates, susceptible to plasticizer migration of contamination.
  • No bubble formation within sealant in high temperature and humidity applications.
  • Very good mechanical characteristics.


  • Bonding applications in industrial, construction, and automotive industries.
  • Connection joints in sheet metal fabrication, sealing of air conditioning systems.
  • Sealing of floor joints.
  • Strong and elastic bonding in constructions that are prone to vibrations.
  • Supple bonding in car bodies, caravans, and containers.

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