Dow 790 Silicone Building Sealant - 20 Fluid Ounce Sausage

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Dow 790 Black Silicone Sealant - 20 Oz. Sausage 790BLS

$18.92 each

20 ounce sausage
Ultra low modulus unprimed adhesive formula
Excellent performance even in building joints with extreme movement
Suitable for new and existing construction
Extension/compression capability of +100/-50 percent
Forms a durable, pliable, watertight bond with many common building substrates
Can be used on concrete driveway expansion joints
Case quantity: 16 sausages
Pallet quantity: 48 cases
768 sausages per pallet

SKU:

790BLS

In Stock

Color Chart

Return Policy | Shipping Policy

Product Overview

Dowsil 790 (formerly Dow Corning 790) silicone building sealant is comprised of a one-part silicone formula that cures in the presence of moisture in the atmosphere that produces a durable, fire-resistant, pliable and ultra-low-modulus silicone rubber building joint seal. Dow 790 has excellent weathering properties and resists usually harmful sunlight, rain, snow, and temperature extremes. This product does not need priming to substrates such as concrete and masonry and is easily applied within a very broad temperature range. Dow 790 silicone is an ultra-low-modulus sealant for both new and existing construction joint sealing applications. For driveways, recess sealant 1/8" from surface.

Applications

Stone
Concrete
Cinder block
Masonry
Granite
Marble
Aluminum
Painted substrates
Glass
Construction joints
Expansion joints
Control joints
Exterior Insulation and Finish Systems (EIFS) joints
Curtainwall joints
Horizontal and vertical joints
Mullion joints
Stone pavers

Limitations

In structural applications.
Below grade or to materials that outgas, which can cause bubbling in curing sealant.
On brass or copper or other similar material that can be corroded.
To surfaces that are continuously immersed in water.
For use as an interior penetration fire-stop sealing system.
To building materials that bleed oils, plasticizers, or solvents
Materials such as impregnated wood, oil based caulks, green or partially vulcanized rubber gaskets, tapes or bituminous below-grade waterproofing and asphalt-impregnated fiberboard.
In totally confined spaces since the sealant requires atmospheric moisture for adequate curing
To surfaces that will be painted after application. The paint film will not stretch with the extension of the sealant and may crack, peel and most likely will not adhere to the sealant adequately.
To surfaces in direct or indirect contact with food.
To wet or frost-laden surfaces.
In applications where solvents or primers are not fully dried prior to sealant application. Uncured sealant is very sensitive to many solvents, primers, and cleaning agents; these may cause the sealant to remain uncured or tacky.

This product is neither tested nor represented as suitable for medical or pharmaceutical uses.

Additional Resources

790 Natural Stone SDS

790 Precast White SDS

790 Rustic Brick SDS

790 Sandstone SDS

790 White SDS

Dow 790 Silicone Building Sealant Instructions

Selection

SKU	Color	Case Qty
790BLS	Black	16
790LS	Limestone	16
790WS	White	16
790PWS	Precast White	16
790NSTS	Natural Stone	16
790BRZS	Bronze	16
790SS	Sandstone	16
790CHS	Charcoal	16
790GRYS	Gray	16
790ATS	Adobe Tan	16
790RBS	Rustic Brick	16

Product Specifications

Brand	Dow
Series	790
Container Size	20 fl. oz.
Container Type	Sausage

Composition	Ultra low moduus, self-primed silicone building sealant
Paintable	No
Primer needed	No to most substrates
Full adhesion	14-21 days
Tack-free time	60 minutes; 50%RH
Application temperature	Can be applied to a clean and dry surface as low as -20°F but keep in mind the colder and lower the humidity, the slower the cure rate.
Curing time	7 - 14 days at 77 degrees F at 50% RH
Working time	10 - 20 minutes
Peel strength	25 ppi
Tensile strength	15 psi at 25% extension; 20 psi at 50% extension
Tensile strength maximum	100 psi
Shelf life	12 months from date of manufacture