DOWSIL : 991

Dow Corning® 991 Silicone High Performance Sealant

Medium-modulus elastomeric sealant designed for weatherproofing sensitive natural stone, glass and metal panels.


Dow Corning® 991 Silicone High Performance Sealant is specially formulated to prevent staining of porous substrates such as natural stone and minimize streaking on metal panels and glass. It forms a durable, flexible, watertight bond with most building materials and can be used for new and remedial construction applications.


Specification Writers: These values are not intended for use in preparing specifications. Please contact your local Dow Corning sales office or your Global Dow Corning Connection before writing specifications on this product.

* ASTM: American Society for Testing and Materials
1. Based on South Coast Air Quality Management District of California maximum VOC is listed both inclusive and exclusive of water and exempt compounds. For a VOC data sheet for a specific sealant color, please send your request to