DOWSIL 789 Silicone Weatherproofing Sealant

A high-performance, one-part silicone sealant designed for professional weatherproofing applications. DOWSIL 789 is a neutral-curing sealant, meaning it releases no corrosive byproducts during cure, making it safe for use on sensitive substrates like metal, glass, and marble.

This ready-to-use sealant requires no mixing and offers excellent all-temperature gunnability, allowing for easy application in both hot and cold conditions. It provides strong, unprimed adhesion to most common building materials, including glass, aluminum, granite, and cured paints.

Its primary use is for sealing and weatherproofing movement and non-movement joints in buildings, effectively protecting against air and water infiltration. It remains flexible and durable after curing, ensuring long-lasting performance in various climates.