DOWSIL™ 995 Silicone Structural Sealant 10.3oz Cartridge


A single-component, neutral-cure elastomeric adhesive, meticulously formulated for silicone structural glazing, showcasing outstanding unprimed adhesion to a broad spectrum of building substrates. Engineered with superior unprimed adhesion, it excels in structural glazing applications for hurricane or impact-rated windows and doors. With a remarkable movement capability of +/- 50%, it ensures resilience and durability in dynamic environments.

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Technical Data Sheet


  • Structural joints in small and medium-sized buildings.
  • Sealant for protective glass applications.


  • Odorless, non-corrosive curing system ensures user comfort and safety.
  • Forms an exceptionally tough elastomeric rubber upon curing, providing a durable, flexible, and watertight bond.
  • Exhibits outstanding weatherability and high resistance to ultraviolet radiation, heat, humidity, ozone, and temperature extremes.
  • Boasts excellent mechanical properties for long-lasting performance.
  • Successfully tested for use in protective glazing applications.
  • Offers excellent unprimed adhesion to a wide range of substrates, including coated, enameled, and reflective glasses; anodized and polyester-coated or painted aluminum profiles, including most fluoropolymer-based paints.
  • Complies with global standards for structural glazing, including American, Chinese, and European regulations.
Typical Properties
Adhesion to Alodine Aluminum, Aluminum, Anodized Aluminum, Enamelled and Reflective Glass, Extruded Mill Finish, Fluorocarbon Coated Aluminum, Glass, Heat Strengthened Glass, Low E Coated Glass, Metal, Metal Panels, Polyester Powder Coated Aluminum/Steel, Stainless Steel, Steel, Vinyl/PVC-U
Appearance Opaque
Chemistry Neutral
Color Black, Grey, White
Durometer - Shore A 40 Shore A
Elongation 525 %
Flow/Sag (Slump) 2.54 mm
Movement Medium
Peel Strength 40 ppi
Shelf Life 540 Days
Specific Gravity @ 25°C 1.339
Substrate Non-porous
Tear Strength 49 ppi
Tensile Strength 350 psi
Volatile Organic Content 30 g/liter
Application Benefits
Movement Capability -50 to 50 %
Resistance Type Ozone Resistance, Thermal Resistance, UV Resistance, Water Resistance
Water Resistant true
Processing-Formulating Benefits
Cure System 1-Part Cure
Cure Type Neutral Cure
Number of Parts One
Room Temperature Cure - Hours 168 to 336 Hours
Tack-Free Time-50% RH 65 Minutes
Where Used Job Site
Working Time 10 to 20 Minutes

Additional information

Weight 1.6 lbs
Dimensions 1 × 1 × 1 in