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Dowsil™ 795 Silicone Building Sealant

Dowsil™ 795 is a high-performance, neutral-cure silicone sealant offering exceptional weatherability, adhesion, and flexibility for structural and non-structural glazing, and diverse construction applications.
Vendor: Dowsil
SKU: SILDC795BL/SSG
Availability: In Stock
$18.73
$18.73
Prices do not include GST
Physical Properties
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 inches (2.54 mm)
Working time: 20–30 minutes
Voc content: 30 g/l
Durometer hardness, shore a: 35 points
Peel strength: 32 lb/in (5.7 kg/cm)
Tension adhesion strength at 25% extension: 45 psi (0.310 mpa)
Tension adhesion strength at 50% extension: 60 psi (0.414 mpa)
Joint movement capability: ±50 percent
Staining (granite, marble, limestone, brick and concrete): None
Tension adhesion strength at 25% extension after 10,000 hours in a quv weatherometer, astm g 53: 35 psi (0.241 mpa)
Tension adhesion strength at 50% extension after 10,000 hours in a quv weatherometer, astm g 53: 50 psi (0.345 mpa)
Composition: One–part, neutral cure, rtv silicone sealant
Colours: White, limestone, champagne, natural stone, grey, black, bronze, sandstone, adobe tan, dusty rose, rustic brick, blue spruce, anodised aluminium, charcoal, and ivy green
Packaging: 10.3 fl oz. (305 ml) disposable plastic cartridges, 20 fl oz. (590 ml) sausages, 2 and 4.5 gal (7.5 and 17 l) bulk containers
Shelf life: 12 months from the date of manufacture when stored at or below 27°c (80°f)

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Shipping & Delivery

$15.95 + GST for Australia-wide shipping, excluding DG, oversized, long-length, and bagged items over 15kg. Rural, remote areas and site deliveries are also ineligible. If your order includes any of these, we will contact you to arrange additional freight fees. Online purchases only.

Dowsil™ 795 Silicone Building Sealant
Vendor: Dowsil
Dowsil™ 795 Silicone Building Sealant
$18.73
Vendor: Dowsil
Dowsil™ 795 Silicone Building Sealant
$18.73
Size: 591ml
Colour: Black
Package Type: Single Buy
Use Dowsil™ 795 Silicone Building Sealant for: Structural glazing, weather sealing, and general construction applications requiring high flexibility and durability.

Dowsil™ 795 Silicone Building Sealant is a one-part, neutral-cure, architectural-grade sealant designed for both structural and non-structural applications. Its exceptional weatherability, adhesion, and flexibility make it ideal for diverse construction needs, including structural glazing, panel systems, and general weather sealing. This sealant easily extrudes in any weather and cures quickly at room temperature, forming a durable, medium-modulus silicone rubber that accommodates ±50% movement of original joint dimensions. With excellent unprimed adhesion to a wide variety of substrates and low VOC content, Dowsil™ 795 ensures reliable and environmentally conscious performance.

Key Features of Dowsil™ 795 Silicone Building Sealant

  • Versatile Application: Suitable for structural glazing, weather sealing, and panel systems, reducing the need for multiple products.
  • Excellent Weatherability: Performs reliably in extreme temperatures (-40°F to 300°F), ensuring long-term durability.
  • High Joint Movement Capability (±50%): Accommodates significant structural movement, preventing cracks and failures.
  • Excellent Unprimed Adhesion: Bonds strongly to various substrates, including anodised and coated aluminium, reducing preparation time.
  • Low VOC Content (30 g/L): Meets environmental standards and enhances user safety.
  • Neutral Cure: Low odour and compatibility with a wide range of building materials.

Technical Overview

Dowsil™ 795 is a one-part, neutral-cure RTV silicone sealant that cures to a medium modulus silicone rubber upon exposure to atmospheric moisture. It has a tack-free time of 3 hours and a curing time of 7–14 days at 25°C and 50% RH. With a Shore A hardness of 35 and a peel strength of 32 lb/in, it provides robust and reliable performance.

Chemical Properties: Neutral-cure silicone sealant with excellent resistance to weathering, UV, and temperature extremes.

Application Temperature Range: Suitable for application in a wide range of weather conditions, but surface temperatures should not exceed 50°C (122°F) during installation.

Application Information

  • Required Tools: Caulking gun, tooling spatula, masking tape.
  • Trade-Specific Tips: Ensure joints are clean and free from contaminants. Use backing material for proper joint design. Tool sealant within 15 minutes of application.
  • Common Issues and Solutions: Ensure proper joint design and surface preparation for optimal adhesion. Test porous surfaces for primer requirements.

Storage and Shelf Life

  • Storage Requirements: Store at or below 27°C (80°F).
  • Shelf Life Information: 12 months from the date of manufacture.
  • Temperature Considerations: Avoid storing in temperatures exceeding 27°C (80°F) to maintain product integrity.

Certifications

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

Frequently Asked Questions About Dowsil™ 795 Silicone Building Sealant

Q: Can Dowsil™ 795 be used for structural glazing?

A: Yes, Dowsil™ 795 is specifically designed for both structural and non-structural glazing applications, offering high strength and durability.

Q: What types of surfaces does Dowsil™ 795 adhere to?

A: Dowsil™ 795 exhibits excellent unprimed adhesion to a wide range of surfaces, including glass, aluminium, steel, painted metal, EIFS, stone, concrete, brick, and plastics.

Q: How long does Dowsil™ 795 take to cure?

A: Dowsil™ 795 cures in 7–14 days at 25°C and 50% RH, with full adhesion achieved in 14–21 days.

Q: Is Dowsil™ 795 suitable for extreme weather conditions?

A: Yes, Dowsil™ 795 is designed to withstand extreme temperatures, ranging from -40°F (-40°C) to 300°F (149°C), ensuring reliable performance in any climate.

Q: What safety precautions should I take when using Dowsil™ 795?

A: Read the product and safety data sheets before handling. Ensure proper ventilation. Avoid contact with skin and eyes. Dispose of waste according to local regulations.

Use Dowsil™ 795 Silicone Building Sealant for:

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

Why Use Dowsil™ 795 Silicone Building Sealant:

  • Versatile: High-performance structural glazing and weather sealing from a single product.
  • Durable: Excellent weatherability and long-term performance.
  • Adhesive: Excellent unprimed adhesion to a wide variety of construction materials.
  • Easy to Use: All-temperature gunnability, easy tooling, and low-odour cure by-product.
  • Flexible: Accommodates ±50% movement of original joint dimension.

How to apply Dowsil™ 795 Silicone Building Sealant:

  1. Preparation: Clean all joints, removing foreign matter and contaminants.
  2. Installation: Install backing material, joint filler, setting blocks, spacer shims, and tapes.
  3. Masking: Mask areas adjacent to joints to ensure neat sealant lines.
  4. Priming: Primer is generally not required on non-porous surfaces, but may be necessary for porous surfaces. A test placement is recommended.
  5. Application: Apply Dowsil™ 795 Silicone Building Sealant in a continuous operation using positive pressure.
  6. Tooling: Before a skin forms (typically within 15 minutes), tool the sealant with light pressure.
  7. Finishing: Remove masking tape as soon as the bead is tooled.

Dowsil™ 795 Silicone Building Sealant limitations:

  • Should not be used in structural applications without prior review and approval.
  • Not for use in below-grade applications.
  • Do not apply when surface temperatures exceed 50°C (122°F) during installation.
  • Not for use on surfaces continuously immersed in water.
  • Do not use on building materials that bleed oils, plasticisers, or solvents.
  • Not for use on frost-laden or wet surfaces.
  • Not for use in totally confined joints.
  • Not suitable if the sealant is intended to be painted.
  • Not for surfaces in direct contact with food or other food-grade applications.
  • Not suitable for medical or pharmaceutical uses.

Safety precautions when using Dowsil™ 795 Silicone Building Sealant:

  • Safety Data Sheets: Read product and safety data sheets and container labels for safe use, physical, and health hazard information.
  • Handling: Use with caution and follow safety guidelines.
  • Disposal: Dispose of in accordance with all local, state (provincial), and federal regulations.

Dowsil™ 795 Silicone Building Sealant can be used on the following substrates:

  • Glass
  • Aluminium (anodised, alodined, coated, and many Kynar painted)
  • Steel
  • Painted metal
  • EIFS (Exterior Insulation Finishing Systems)
  • Granite and other stone
  • Concrete
  • Brick
  • Plastics

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