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Dowsil 890-SL Self-Leveling Silicone Joint Sealant

Dowsil 890-SL Self-Leveling Silicone Joint Sealant

Dowsil™ 890-SL is a high-performance, self-levelling silicone sealant designed for concrete and asphalt pavement joints, offering exceptional movement capability and durability.
Vendor: Dowsil
SKU: SILDC890/SSG
Availability: In Stock
$26.07
$26.07
Prices do not include GST
Physical Properties
Flow: Pass smooth, level
Extrusion rate, minimum: 231 ml/min
Tack free time: Pass 5 hours max
Heat aging: 0.97%
Durometer shore 00: 41
Specific gravity: 1.26–1.34
Cure time, ½” x ½” x 2” (73°f, 50% r.h.): Pass 21 day cure
Bond, non-immersed: Pass no cracks or separation
Bond, water immersed: Pass no cracks or separation
Bond, oven aged: Pass no cracks or separation
Ultimate elongation: 1400%
Tensile stress @ 150%: 9 psi
Effects of accelerated weathering: Pass 5,000 hours
Resilience: 77%
Joint movement capability, +100/-50 percent, 10 cycles: No failure
Composition: One-part, cold applied, self-levelling silicone
Packaging: 29 fl oz (857 ml) disposable plastic cartridges, 4.5 gal (17 l) bulk pails, and 50 gal (189 l) bulk drums
Storage: Keep stored in original, unopened containers at or below 32°c (90°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.

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Dowsil 890-SL Self-Leveling Silicone Joint Sealant
Dowsil
Dowsil 890-SL Self-Leveling Silicone Joint Sealant
$26.07
Dowsil 890-SL Self-Leveling Silicone Joint Sealant
Dowsil
Dowsil 890-SL Self-Leveling Silicone Joint Sealant
$26.07
Package Type: Single Buy
Description  
Use Dowsil™ 890-SL Silicone Joint Sealant for: Concrete and asphalt pavement joints, new construction, and remedial applications.

Dowsil™ 890-SL Silicone Joint Sealant is a one-part, self-levelling silicone material designed for sealing concrete and concrete-to-asphalt pavement joints. Its ultra-low modulus and high movement capability make it ideal for accommodating significant pavement movement, ensuring long-term seal integrity. This sealant is weather and UV resistant, fuel resistant for short-term exposure, and offers unprimed adhesion to Portland cement concrete and asphalt, reducing labour and material costs. With a fast skin-over time, roadways can be quickly reopened to traffic, minimising disruption.

Key Features of Dowsil™ 890-SL Silicone Joint Sealant

  • Self-Levelling: No tooling required, simplifying application and saving labour.
  • High Movement Capability: 100% extension and 50% compression, accommodating significant pavement movement.
  • Ultra-Low Modulus: Minimises stress on asphaltic joints, preventing premature failure.
  • Unprimed Adhesion: Reduces preparation time and costs, enhancing efficiency.
  • Fast Skin-Over Time: Allows for quick reopening of roads to traffic, minimising disruption.
  • Fuel Resistance: Suitable for areas with potential fuel spills, enhancing durability.
  • Weather and UV Resistant: Ensures long-term performance in outdoor environments.

Technical Overview

Dowsil™ 890-SL is a one-part, cold-applied, self-levelling silicone that cures to an ultra-low-modulus silicone rubber upon exposure to atmospheric moisture. It has a Shore 00 durometer hardness of 41 and an ultimate elongation of 1400%. Its specific gravity ranges from 1.26 to 1.34.

Chemical Properties: One-part, cold-applied, self-levelling silicone sealant with excellent weather and UV resistance.

Application Temperature Range: Can be extruded from -20 to 120°F.

Application Information

  • Required Tools: Caulking gun (for cartridges), bulk dispensing equipment (for pails/drums), backer rod.
  • Trade-Specific Tips: Ensure joints are clean and dry. Use proper backer rod installation to prevent three-sided adhesion. Recess sealant as recommended for pavement grinding.
  • Common Issues and Solutions: Avoid application on wet or damp surfaces or during inclement weather. Follow joint design recommendations forStorage Requirements: Store in original, unopened containers at or below 32°C (90°F).
  • Shelf Life Information: Refer to product packaging for “Use By” date.
  • Temperature Considerations: Keep containers tightly closed and avoid storing in high temperatures.

Certifications

  • ASTM D 5893 Type SL
  • FAA P-605 for silicone joint sealants
  • Meets SS-S-200E (section 4.4.12) Flame Test Requirements
  • EN 14187-5 Hydrolysis Test
  • EN 14188-2 Class B, C and D
Common Questions  

Frequently Asked Questions About Dowsil™ 890-SL Silicone Joint Sealant

Q: Can Dowsil™ 890-SL be used for both concrete and asphalt joints?

A: Yes, Dowsil™ 890-SL is designed for both concrete-to-concrete and concrete-to-asphalt pavement joints.

Q: Does Dowsil™ 890-SL require primer for application?

A: No, Dowsil™ 890-SL offers unprimed adhesion to Portland cement concrete and asphalt, reducing the need for primer.

Q: How long does Dowsil™ 890-SL take to cure?

A: Dowsil™ 890-SL typically cures in 21 days at 73°F (25°C) and 50% RH.

Q: Can Dowsil™ 890-SL be used in cold weather?

A: Yes, Dowsil™ 890-SL can be extruded from -20 to 120°F, making it suitable for a wide range of temperatures.

Q: What safety precautions should I take when using Dowsil™ 890-SL?

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

Uses & Benefits  

Use Dowsil™ 890-SL Silicone Joint Sealant for:

  • Concrete to concrete pavement joints.
  • Concrete to asphalt pavement joints.
  • New construction pavement joints.
  • Repair and remedial pavement joint applications.
  • Irregularly shaped and spalled joints.

Why Use Dowsil™ 890-SL Silicone Joint Sealant:

  • Self-Levelling: Simplifies application and saves labour.
  • High Movement Capability: Accommodates significant pavement movement.
  • Ultra-Low Modulus: Minimises stress on joints.
  • Unprimed Adhesion: Reduces preparation time and costs.
  • Fast Skin-Over Time: Allows for quick reopening of roads.
  • Weather and Fuel Resistant: Ensures long-term durability.
How To Apply  

How to apply Dowsil™ 890-SL Silicone Joint Sealant:

  1. Preparation: Clean joints and remove any debris.
  2. Backer Rod Installation: Install backer rod to proper depth.
  3. Application: Apply Dowsil™ 890-SL using a caulking gun or bulk dispensing equipment.
  4. Finishing: Allow sealant to self-level; no tooling is required.
  5. Curing: Allow sealant to cure for 21 days at 73°F (25°C) and 50% RH.
Limitations and Safety Info  

Dowsil™ 890-SL Silicone Joint Sealant limitations:

  • Not recommended for continuous water immersion.
  • Should not be applied in totally confined spaces.
  • Avoid application on wet or damp surfaces or during inclement weather.
  • Consult Dow for airfield runway applications.
  • Not for spill containment areas.
  • Not for medical or pharmaceutical uses.

Safety precautions when using Dowsil™ 890-SL Silicone Joint Sealant:

  • Safety Data Sheets: Read product and safety data sheets before use.
  • Handling: Use proper protective equipment.
  • Disposal: Dispose of in accordance with local, state, and federal regulations.
Suitable Substrates  

Dowsil™ 890-SL Silicone Joint Sealant can be used on the following substrates:

  • Concrete pavements
  • Asphalt pavements
  • Concrete to asphalt joints

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