DOWSIL 335 Butyl Sealant Black

One-component polyisobutylene, solvent-free and non-reactive primary sealant adhesive.


  • It is suitable for domestic and commercial projects in air and gas filled double glazing and triple insulated glazing applications.
  • It complies with EN 1279 norms in insulated glass systems.
  • Compatible with DOWSIL™ neutral glazing sealants, including market leader DOWSIL™ 993.