BS-8620 MS Sealant (600ml) Black

Specially developed for sealing concrete and precast concrete joints

Price On Request

BOSSIL BS-8620 is a one-part, high-performance hybrid sealant that is based on advanced MS Polymer technology.
It has excellent weathering, UV, and temperature resistance characteristics. The low VOC formula does not contain solvent & isocyanate hence will not face shrinkage and air bubbling issue. It is also free of silicone oil, reducing aesthetic issues caused by silicone oil staining / streaking. The adhesion on various substrates is good even without primer, yet it is
paintable with common industrial paints.


  • ASTM C920 compliant
  • ISO 11600 (F Class 25LM) Compliant
  • +/- 50% Movement Capability
  • Good UV Resistance
  • Paintable
  • Low Static Charge (less dirt streaking)
  • Silicone-Free (Non-staining on adjacent substrates)
  • Isocynate Free (No air bubbling)
  • Solvent Free (No shrinkage)
  • Primerless bonding to most surfaces



  • Ideal for sealing building concrete joints like wall panel joints, expansion joints, control joints, etc.
  • It is also recommended for window frame perimeter sealing especially when painting of sealant is required.
  • Facade systems designed with metal panels or natural stones can be sealed with this product too.
  • Other common applications include sealing of anodized aluminum, finished wood, porcelain, coated metal, epoxy and polyester panels, polystyrene, UPVC, and stainless steel.