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Dowsil Silicone Building Sealant DS-795- Black (600 ml)
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Dowsil Silicone Building Sealant DS-795- Black (600 ml), DS-795-Black

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Dowsil Silicone Building Sealant DS-795- Black (600 ml)


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Product Specification

Foil Sausages
600 ml
Working Time
20 - 30 Minutes
Model No.
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Dowsil Silicone Building Sealant DS-795- Black (600 ml)

Product Description

DOWSIL 795 Silicone Building Sealant is a one-part, neutral-cure, architectural-grade sealant that easily extrudes in any weather and cures quickly at room temperature. This cold-applied, non-sagging silicone material cures to a medium modulus silicone rubber upon exposure to atmospheric moisture.

The cured sealant is durable and flexible enough to accommodate ± 50 percent movement of original joint dimension when installed in a properly designed weather seal joint. In a properly designed structurally glazed joint, the sealant is strong enough to support glass and other panel materials under high wind load. A one-part, cold-applied, non-sagging silicone material that cures to a medium modulus silicone rubber upon exposure to atmospheric moisture.

Features & Benefits:

  • Highly resistant to weather, UV and temperature extremes
  • One-part, medium-modulus neutral-cure adhesive/sealant silicone material
  • Supports glass and other panel materials under high wind load
  • Weatherproofs substrates such as glass, aluminum, steel, painted metal, EIFS, granite & other stone, concrete, brick, plastic
  • Ready to use as supplied with all-temperature gunnability, easy tooling and low-odor curing
  • Suitable for most new construction and remedial sealing applications
  • Versatile - high performance structural glazing and weather sealing from a single product
  • Available in 15 standard colors; custom colors also available
  • Excellent weatherability virtually unaffected by sunlight, rain, snow, ozone and temperature extremes of -40°F (-40°C) to 300°F (149°C)
  • Excellent unprimed adhesion to a wide variety of construction materials and building components, including anodized, alodined, most coated and many Kynar painted aluminums
  • Ease of application - ready to use as supplied
  • Ease of use - all temperature gunnability, easy tooling and low-odor cure byproduct
  • Meets global standards (Americas, Asia and Europe)


  • One-part, neutral cure, RTV silicone sealant


  • Adhesion to - Alodine Aluminum, Aluminum, Anodized Aluminum, Brickwork, Ceramic, Concrete, Enamelled and Reflective Glass, Extruded Mill Finish, Fluorocarbon Coated Aluminum, Glass, Granite, Heat Strengthened Glass, Light-Weight Stone Panels, Limestone, Low E Coated Glass, Marble, Masonry, Metal, Metal Panels, Paint, Plastic, Polyester Powder Coated Aluminum/Steel, Silicone, Stainless Steel, Steel, Stone, Vinyl/PVC-U, Wood
  • Appearance - Opaque
  • Chemistry - Neutral
  • Color - Adobe Tan, Anodized Aluminum, Black, Blue Spruce, Bronze, Champagne, Charcoal Gray, Custom, Dusty Rose, Gray, Limestone, Natural Stone, Rustic Brick, Sandstone, White
  • Cure System : 1-Part Cure
  • Durometer - Shore A : 35 Shore A
  • Flow - NonSag
  • Flow/Sag (Slump) - < 2.54 mm
  • Movement - Medium
  • Movement Capability : -50 to 50 %
  • Peel Strength - 32 ppi
  • Primerless Adhesion - Primerless
  • Resistance Type - Ozone Resistance, Thermal Resistance, UV Resistance, Water Resistance
  • Room Temperature Cure - Hours : 168 to 336 Hours
  • Shelf Life - 360 Days
  • Substrate - Non-porous, Porous
  • Tack-Free Time-50% RH - 180 Minutes
  • Tensile Strength - 45 psi
  • Volatile Organic Content - 28 g/liter
  • Water Resistant - Yes
  • Where Used - Job Site
  • Working Time - 20 to 30 Minutes

Typical Properties : Specification Writers: These values are not intended for use in preparing specifications.

  • As Supplied:
    • Tack Free Time, 50% RH - 3 hours
    • Curing Time at 25°C (77°F) and 50% RH - 7-14 days
    • Full Adhesion - 14-21 days
    • Flow, Sag or Slump - 0.1 (2.54) Inches (mm)
    • Working Time - 20-30 minutes
    • VOC Content - 32 g/L
  • As Cured After 21 days at 25°C (77°F) and 50% RH:
    • Durometer Hardness, Shore A - 35 points
    • Peel Strength - 32 (5.7) lb/in (kg/cm)
    • Tension Adhesion Strength - At 25% Extension (45 (0.310)) / At 50% Extension (60 (0.414)) psi (MPa)
    • Joint Movement Capability - ± 50 %
    • Staining (granite, marble, limestone, brick and concrete) - None
  • As Cured After 21 days at 25°C (77°F) and 50% RH Followed by 10,000 Hours in a QUV Weatherometer, ASTM G 53:
    • Tensile Adhesion Strength : At 25% Extension (35 (0.241)) / At 50% Extension (50 (0.345)) psi (MPa)


  • Structural and nonstructural glazing
  • Structural attachment of many panel systems
  • Panel stiffener applications
  • Weather sealing of most common construction materials including glass, aluminum, steel, painted metal, EIFS, granite and other stone, concrete, brick and plastics

Approvals / Specifications:

DOWSIL 795 Silicone Building Sealant meets the requirements of:

  • Federal Specification TT-S 001 543A (COM-NBS) Class A for silicone building sealants
  • Federal Specification TT-S-00230C (COM-NBS) Class A for one-part building sealants
  • ASTM Specification C 920 Type S, Grade NS, Class 50, Use NT, G, A and O
  • ASTM Specification C 1184 for structural silicone sealants
  • Canadian Specification CAN2-19.13- M82

How to Use:

  • Preparation:
    • Clean all joints, removing all foreign matter and contaminants such as grease, oil, dust, water, frost, surface dirt, old sealants or glazing compounds and protective coatings.
  • Application Method:
    • Install backing material or joint filler, setting blocks, spacer shims and tapes. Mask areas adjacent to joints to ensure neat sealant lines. Primer is generally not required on nonporous surfaces, but may be necessary for optimal sealing of certain porous surfaces. A test placement is always recommended.
    • Apply DOWSIL 795 Silicone Building Sealant in a continuous operation using positive pressure. (The sealant can be applied using many types of air-operated guns and most types of bulk dispensing equipment.) Before a skin forms (typically within 15 minutes), tool the sealant with light pressure to spread the sealant against the backing material and joint surfaces. Remove masking tape as soon as the bead is tooled.

Handling Precautions

  • Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information.


DOWSIL 795 Silicone Building Sealant should not be used:

  • In structural applications without prior review and approval by your local sales application engineer
  • In below grade applications
  • When surface temperatures exceed 50°C (122°F) during installation
  • On surfaces that are continuously immersed in water
  • On building materials that bleed oils, plasticizers or solvents that may affect adhesion
  • On frost laden or wet surfaces
  • In totally confined joints (the sealant requires atmospheric moisture for cure)
  • If the sealant is intended to be painted (paints do not typically adhere to most silicone sealants)
  • To surfaces in direct contact with food or other food-grade applications

Usable Life And Storage:

  • When stored at or below 27°C (80°F), DOWSIL 795 Silicone Building Sealant has a shelf life of 12 months from the date of manufacture. Refer to product packaging for "Use By Date".

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