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DOWSIL 791 20OZ SILICONE WEATHERPROOFING SEALANT

Item #: DOWSIL79120oz
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DOWSIL 791 WHITE 20 OZ

DOWSIL 791 is a one-part, medium-modulus, elastomeric sealant designed for general weathersealing

Formerly: Dow Corning 791

One of the most economical options for quality silicone weathersealing, DOWSIL 791 Silicone Weatherproofing Sealant is a neutral-cure, one-part sealant that quickly cures to a durable, flexible seal that can accommodate significant joint movement. It is a silicone formulation that cures into a flexible and curable silicone rubber building joint seal.

Especially suited for perimeter sealing around doors and windows, it's also excellent for sealing expansion and control joints, precast concrete panels, curtainwall, mullion joints, and internal seals and end dams.

  • Ideal for expansion, connection, perimeter, and other movement joints
  • Neutral cure; suitable for use on coated glass, galvanized steel, masonry, and other porous and nonporous substrates
  • Extension/compression movement capability of up to +100/-50 percent of the original joint width
  • Excellent weatherability, virtually unaffected by sunlight, rain, snow, ozone
  • Excellent unprimed adhesion to a wide variety of construction materials and building components
  • Ease of use; ready to use as supplied
  • Excellent rheology, low string upon gunning
  • Composition - One-part, neutral-cure, RTV silicone sealant.


Joint Size D x W Inches 1 Gallon 10.3 Fl. Ounce Tube 20.3 Fl. Ounce Sausage 2 Gallon 4.5 Gallon Pail
3/16 x 1/4 411 33 64 821 1848
3/16 x 3/8 272 22 43 548 1232
3/16 x 1/2 205 16 32 411 924
3/16 x 5/8 164 13 26 329 739
3/16 x 3/4 137 11 21 274 616
1/4 x 1/4 411 33 64 821 1848
1/4 x 3/8 272 22 43 548 1232
1/4 x 1/2 205 16 32 411 924
1/4 x 5/8 164 13 26 329 739
1/4 x 3/4 137 11 21 274 616
3/8 x 1/4 411 33 64 821 1848
3/8 x 3/8 272 22 43 548 1232
3/8 x 1/2 205 16 32 411 924
3/16 x 5/8 164 13 26 329 739
3/8 x 3/4 137 11 21 274 616