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DOWSIL 758 WHITE 20OZ

Item #: DOW758WTS  |  Mfr #: 323727
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DOWSIL 758 WHITE 20 OZ

DOWSIL 758 is a neutral one-part silicone sealant, designed for adhering to low-energy surfaces common in sheet or peel and stick weather-resistant barriers

DOWSIL 758 allows interior air sealing between a sheet or liquid applied weather resistant barrier and fenestration element. It is suitable for edge lap seal for weather-resistant barriers and works as sealing penetrations in weather-resistant barriers such as plumbing or ductwork. It also allows sealing other difficult to adhere surfaces such as mill finishes and plastics.

DOWSIL 758 offers excellent adhesion to a wide range of building materials, including polymeric surfaces that are traditionally difficult to adhere to, such as peel and stick weather-resistant barriers. The one-part RTV, neutral-cure silicone sealant does not require priming on most surfaces. This product can expose you to chemicals including Ethylbenzene, which is known to the State of California to cause Cancer and/or Reproductive Issues.

  • Usable over wide temperature range
  • Excellent adhesion to extruded and formed silicone sheet materials
  • Adheres to many polyethylene film based weather resistant barriers
  • Adheres to many spun-bonded polyolefin and fibrous or woven air barriers
  • Adheres to many other sealing elements such as flashing or elastomeric liquid applied weather barriers
  • Adheres to many common fenestration element materials such as anodized aluminum, vinyl, PVC, powder coat, paint and fluoropolymer coatings
  • Contributes to improved air tightness of window installations
  • UV resistant
  • Excellent durability, does not become brittle or crack
  • Movement capability of +/- 25% in a properly designed joint.


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