Dow 890-SL Self Leveling Joint Sealant

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Description for Dow 890-SL Self Leveling Joint Sealant

All temperature gunnability; seals irregular surfaces without tooling; unprimed adhesion; ultra-low modulus; good weatherability; short cure time.

*See Terms of Use Below

Application Type	Bond, Repair, Sealant
1 Part or 2 Part	1 Part
Material Form	Liquid
Substrate	Portland cement concrete
Manufacturer	Dow
Chemistry	Silicone
Cure Method	Moisture
Cure Temperature (°C)	25, 25
Cure Time (min)	Short
Viscosity (cPs)	Self-leveling
Color	Dark gray
Key Specifications	ASTM (American Standard Test Method): ASTM D 5893-96

Best Practices for Dow 890-SL Self Leveling Joint Sealant

*See Terms of Use Below

Surface Preparation

the surface must be clean, dry and frost-free
Application

Dow Corning 890-SL Self-Leveling Silicone Joint Sealant is an easy-to-use, to-use, self-leveling sealant that does not require a separate tooling step as conventional, non-sag sealants do. Because the sealant is self-leveling, it cannot be used on vertical surfaces. Before attempting to seal joints in new asphalt, the asphalt must be given sufficient time to cool and to “cure,” so that damage will not result from sawing. This time will depend upon a number of factors, such as mix design, time of year for placement, geographic location and past experiences. The asphalt must also be completely dry prior to sealant installation. In new construction where the joint is a new cut, a shallow cut may be used where the backer rod is placed on the bottom of the joint. (See Figure 1.) A shallow cut saves time and saw blades. In repair or remedial work where previous sealant materials have failed, care should be taken to completely remove the failed sealant from the joint faces. A standard joint design is recommended in which the backer rod is slightly above the shelf. Extra space should be provided to allow for possible “pumping” of old failed joint sealant that may have fallen below the joint. When Dow Corning 890-SL Self-Leveling Silicone Joint Sealant is used for sealing reflection cracks in asphalt pavements, additional joint preparation steps must be used. Cracks that have formed in the asphalt pavement must be totally removed by saw cutting along both sides of the crack, exposing freshly cut and sound asphalt joint faces. When Dow Corning 890-SL Self-Leveling Silicone Joint Sealant is used to seal asphalt-to-concrete shoulder joints, care must be taken to ensure that the asphalt is completely removed from the concrete face to which the sealant will be bonding. This can be accomplished by saw cutting tightly along the concrete. A fresh and sound joint face must also be prepared in the asphalt by saw cutting. Dow Corning 890-SL Self-Leveling Silicone Joint Sealant is part of a system that must include the proper backer rod and proper installation procedures. Please refer to Dow Corning’s Installation Guide for Silicone Pavement Sealants (Form No. 61-507) for more information on applications, preparation and installation

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Technical Data

Overview

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Specifications

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Best Practices

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Comparable Materials

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Cure Temperature Test Methods

Cure Temperature	Cure Time Test Method
25°C
25°C	As Cured – after 21 days at 25°C (77°F) and 50 percent RH

Cure Time Test Methods

Cure Time	Test Method
Short

Work / Pot Time Test Methods

Work / Pot Time	Temperature

Elongation Test Methods

Elongation	Test Method
14 %	after 21 days at 25°C (77°F) and 50 percent RH

Modulus Test Methods

Modulus	Test Method
Ultra-low
7 psi	joint modulus, at 50 percent Elongation, maximum, after 21 days at 25°C (77°F) and 50 percent RH
8 psi	joint modulus, at 100 percent Elongation, maximum, after 21 days at 25°C (77°F) and 50 percent RH
9 psi	joint modulus, at 150 percent Elongation, maximum, after 21 days at 25°C (77°F) and 50 percent RH

Dow 890-SL Self Leveling Joint Sealant

Description for Dow 890-SL Self Leveling Joint Sealant

Best Practices for Dow 890-SL Self Leveling Joint Sealant

Surface Preparation

Application

Register for FREE to view more details

Why register?

Sign up now Already registered? Sign in!

Technical Data

Overview

laoreet.

ut euismod.

adipiscing.

nibh.

laoreet nonummy sit.

lorem.

Specifications

dolor.

magna.

erat.

nonummy.

tincidunt diam ipsum.

nibh ut aliquam erat.

Best Practices

consectetuer dolor ut dolore amet.

erat nibh lorem amet dolor tincidunt.

diam ipsum sit ut ut ipsum.

ut ipsum aliquam ipsum.

nibh sed sit euismod ut sit.

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Cure Temperature Test Methods

Cure Time Test Methods

Work / Pot Time Test Methods

Elongation Test Methods

Modulus Test Methods

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