DOWSIL 983 Structural Glazing Sealant Base and Curing Agent

Manufacturer: DowSil
Product Type: Vertical Sealants

Short Description

Two-part, neutral-cure, RTV structural silicone sealant.

Quantity Needed

DOWSIL 983 Structural Glazing Sealant.

Features & Benefits

  • DOWSIL 983 Structural Glazing Sealant is a two-part, neutral-cure, RTV silicone sealant.
  • Approved for structural and weatherseal applications1
  • Meets ASTM C719 Class 25 (G, A, O)
  • Meets ASTM C1184 Structural Glazing Specification
  • Low VOC formula (less than 18 g/L when mixed properly)

Composition – Two-part, neutral-cure, RTV silicone sealant


DOWSIL 983 Structural Glazing Sealant is designed for specialized use where dual structural and weatherseal applications are desired for factory glazing and curtainwall production. Once cured, this structural sealant forms a durable, flexible, watertight bond that can be warranted for 20 years and used in ±25% movement weatherseal applications. It has excellent unprimed adhesion to glass, alodine, and anodized aluminum2, although DOWSILTM Primer-C OS is recommended for fast and consistent adhesion, especially to Kynar® and other high-performance substrates approved for architectural structural glazing applications.