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DOWSIL™ 335 Butyl Sealant Black

A one-component polyisobutylene primary sealant which is solvent free and non-reactive. A solid compound, it is applied using conventional heated butylizers and exhibits good physical adhesion to glass and various warm edge and standard spacer systems.


  • Suitable for air and gas-filled double and triple insulating glass units in both residential and commercial projects
  • Meets the requirements according to EN 1279 in an IG system
  • Compatible with neutral curing DOWSIL™ façade silicones including market leading DOWSIL™ 993 Structural Glazing Sealant.


These values are typical properties and are not intended for use in preparing specifications.

  • Specific Gravity Yes No 1.24 g/ml
A new, high performance butyl primary sealant from Dow

DOWSIL™ 355 Butyl Sealant is also available in SPECIAL BLACK which has a temperature resistance of +95-100°C and is color matched to DOWSIL™ 3362 and 3363 Insulating Glass Sealants for improved aesthetics at the glass edge.

No Safety Data Sheets are available online for this material
Please Contact Dow for additional information.

No sales specification could be found for this material in selected language

DOWSIL™ 335 Butyl Sealant Black
No Technical Data Sheets are available for this product
Please Contact Dow for additional information.


DOWSIL™ 335 Butyl Sealant Black

No Regulatory Data Sheets are available for this product

DOWSIL™ 335 Butyl Sealant Black
Please Contact Dow for distribution options available for this product.