Self-Levelling Silicone Sealant for concrete and concrete to asphalt pavement joints.
Features & Benefits
- Self-leveling, no tooling required.
- Can be extruded from -20 to 120°F.
- Flows into irregular joint widths and does not require tooling.
- Movement capability 100% extension and 50% compression.
- Ultra-low modulus.
- Weather and UV resistant.
- Fuel resistant-short term exposure. Refer to Dow Corning form number 62-207 for more information.
- Cold applied, ready-to-use as supplied. No heating or special preparation.
- Unprimed adhesion-primer is not required for Portland cement concrete and asphalt which results in labor and material savings.
- Skin over- typically, the sealant will have a skin-over time of one hour or less at standard conditions allowing roadways to quickly be opened to traffic.
One-part, cold applied, self-leveling silicone.
- Dowsil® 890-SL Silicone Joint Sealant can be used for concrete to concrete and concrete to asphalt pavement joints.
- For use in new construction, repair or remedial applications. Dowsil® 890-SL Silicone Joint Sealant can be used to seal irregularly shaped and spalled joints.
Good Joint Design
- Joint width wide enough to accommodate movement. (For additional information on joint width, see papers by Spells and Klosowski, “Silicone Sealants for Use in Concrete Construction,” Vol. 1, No. 1, American Concrete Institute, SP-70, 1981; J.B. Cook, “Construction Sealants and Adhesives,” Wiley-Interscience, 1970; and J.M. Klosowski, “Sealants in Construction,” Marcel Dekker, 1989.).
- Joint sawed deep enough to allow backer rod/sealant placement and space for pumping of old sealant compounds. NOTE: This applies to standard joints only; void space beneath backer rod in new construction is not needed.
- Proper backer rod placement to prevent three-sided adhesion.
- Sealant installed to proper depth and width.
- Sealant recessed a minimum of 3/8 inch to 1/2 inch (9.53 mm to 12.7 mm) below pavement surface.
- Depth of lowest slab determines the amount of recess required if grinding is anticipated; once grinding is complete, the sealant will have proper recess below the pavement surface.
Dowsil® 890-SL Silicone Joint Sealant is a one-part, self-leveling silicone material that cures to an ultra-low-modulus silicone rubber upon exposure to atmospheric moisture. The cured silicone rubber remains flexible from -20 to 300°F.
Asphaltic paving materials have low tensile strengths. It is important to use an ultra-low modulus material when sealing these substrates to ensure minimal strain is placed on the asphaltic joint face.
- 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
How to Use
Please refer to the Dowsil Silicone Pavement Sealants Installation Guide, form number 61-507.
Product safety information required for safe use is not included in this document. Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information. The safety data sheet is available on the dow corning website at dowsil.com, or from your dow corning sales application engineer, or distributor, or by calling dow corning customer service.
Usable Life & Storage
Keep stored in original, unopened containers at or below 32°C (90°F). Refer to product packaging for “Use By” date. Keep containers tightly closed.
Dowsil® 890-SL Self-Leveling Silicone Joint Sealant is supplied in 29-fl oz (857-mL) disposable plastic cartridges, 4.5-gal (17-L) bulk pails, and 50-gal (189-L) bulk drums.
Dowsil® 890-SL Self-Leveling Silicone Joint Sealant is not recom-mended for continuous water immer-sion. It should not be applied in totally confined spaces where the sealant is not exposed to atmospheric moisture.
The sealant should never be applied to wet or damp asphalt or concrete pavements or installed during inclement weather.
Contact Dow Corning prior to specifying for or installing in airfield runway applications.
Dow Corning does not promote or warrant the use of Dowsil® brand sealants in applications associated with spill containment areas of any kind.
This product is neither tested nor represented as suitable for medical or pharmaceutical uses.
Health & Environmental Information
To support customers in their product safety needs, Dowsil has an extensive Product Stewardship organization and a team of Product Safety and Regulatory Compliance (PS&RC) specialists available in each area.
For further information, please see our website, dowsil.com or consult your local Dow Corning representative.
Limited Warranty Information – Please read Carefully
The information contained herein is offered in good faith and is believed to be accurate. However, because conditions and methods of use of our products are beyond our control, this information should not be used in substitution for customer’s tests to ensure that our products are safe, effective, and fully satisfactory for the intended end use. Suggestions of use shall not be taken as inducements to infringe any patent.
Dowsil’s sole warranty is that our products will meet the sales specifications in effect at the time of shipment.
Your exclusive remedy for breach of such warranty is limited to refund of purchase price or replacement of any product shown to be other than as warranted.
TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, DOWSIL SPECIFICALLY DISCLAIMS ANY OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY.
DOWSIL DISCLAIMS LIABILITY FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.
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Recommended Backer Rod Installation (Shallow Cut)1
1 On road surfaces where grinding is planned at a later date, the sealant and backer rod should be installed so that sealant is approximately 3/8 inch (9.35 mm) below the road surface after grinding is complete. An additional small amount should be added to allow for surface imperfections on the bottom and to provide room for old sealant to pump up from below during rehabilitation work in the summer months.