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DOWSIL™ 983 Structural Glazing Sealant Base and Curing Agent

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 aluminum1, although DOWSIL™ Primer-C OS is recommended for fast and consistent adhesion, especially to high-performance substrates approved for architectural structural glazing applications.

Uses:

  • Structural and sealing applications for factory glazing and glass curtain wall production

Benefits:

  • Approved for structural and weatherseal applications
  • 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)
  • 20 years structural glazing 

Properties

These values are not intended for use in preparing specifications.

Physical Properties

  • Adhesion to Yes No Alodine Aluminum, Aluminum, Anodized Aluminum, Enamelled and Reflective Glass, Fluorocarbon Coated Aluminum, Glass, Heat Strengthened Glass, Low E Coated Glass, Metal, Metal Panels, Paint, Polyester Powder Coated Aluminum/Steel, Stainless Steel
  • Appearance Yes No Opaque
  • Chemistry Yes No Neutral
  • Durometer - Shore A Yes No 43
  • Elongation Yes No 219 %
  • Flow/Sag (Slump) Yes No < 5.1 mm
  • Movement Yes No Low
  • Specific Gravity Yes No 1.38
  • Specific Gravity @ 25°C Yes No 1.38
  • Substrate Yes No Non-porous
  • Tear Strength Yes No 55 ppi
  • Tensile Strength Yes No 228 psi
  • Volatile Organic Content Yes No 4 g/liter

Application Benefits

  • Primerless Adhesion Yes No Primerless

Processing-Formulating Benefits

  • Cure System Yes No 2-Part Cure
  • Cure Type Yes No Neutral Cure
  • Number of Parts Yes No Two
  • Where Used Yes No Factory, Job Site
  • Working Time Yes No 20 to 40 Minutes

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DOWSIL™ 983 Structural Glazing Sealant Base and Curing Agent
No Technical Data Sheets are available online for this material.
Please Contact Dow for additional information.

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DOWSIL™ 983 Structural Glazing Sealant Base and Curing Agent
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