DOWSIL™ Contractors Weatherproofing Sealant

A one-part, moisture cure, medium modulus sealant that provides durable, flexible, watertight joints and offers outstanding unprimed adhesion to most non-porous substrates. It is specifically developed for sealing dynamically moving joints.


  • Dynamically moving joints such as expansion and control joints
  • Concrete panel joints
  • Tilt-up panel joints
  • Curtainwall joints
  • Frame-to-structure and perimeter caulking of windows, doors, panels, EIFS, bedding of mullions, panels and frames, etc.


  • Primerless on EIFS and most common nonporous building substrates, including glass and aluminum
  • Balanced adhesive strength, medium modulus and high recovery
  • Excellent all-weather gunnability and performance
  • Extension/compression capability of ±25 to ±40 percent
  • Available in 10.3 ounce cartridges, 20 ounce sausages and two gallon pails
  • Choose from 20 standard colors, 19 special colors and custom colors, too
  • 5 Year Weatherseal Limited Warranty



  • Adhesion to はい いいえ エナメル&反射ガラス, 押出しミル仕上げ, フッ化炭素被膜アルミニウム, ガラス, グラナイト, アロジンアルミニウム, 熱強化ガラス, 軽量ストーンパネル, Low E被覆ガラス, 大理石, 煉瓦, 金属, 金属パネル, 塗装金属, アルミニウム, プラスチック, ポリエステル・パウダー被覆アルミニウム/スチール, 石材, スチール, ステンレススチール, ビニール/PVC-U, 木, アルマイト, ライムストーン, レンガ積み, セラミックの, コンクリート
  • Application Temperature Range はい いいえ -29 to 49 °C
  • Color はい いいえ ホワイト, グレー, チャコール, ブラック, サンドストーン, ライムストーン, ブロンズ, アルミニウム, オフホワイト, 淡黄色, カスタムカラー, ブロンズ, オフホワイト, プレキャストホワイト, ブロンズ, ジオグラフィックベージュ, アルマイト, 赤褐色, ベージュ, 灰色, アイボリー
  • Cure Type はい いいえ 中性硬化
  • Durometer - Shore A はい いいえ 20 to 30 Shore A
  • Elongation はい いいえ 550 %
  • Movement Capability はい いいえ -40 to 40 %
  • Number of Parts はい いいえ 1
  • Peel Strength はい いいえ 20 to 28 ppi
  • Primerless Adhesion はい いいえ プライマーレス
  • Resistance Type はい いいえ 耐オゾン性, 熱抵抗, UV抵抗, 耐水性
  • Room Temperature Cure - Hours はい いいえ 168 to 336 Hours
  • Service Temperature High はい いいえ 121 °C
  • Service Temperature Low はい いいえ -40 °C
  • Shelf Life はい いいえ 540 Days
  • Tack-Free Time-50% RH はい いいえ 360 Minutes
  • Tensile Strength はい いいえ 180 psi
  • Volatile Organic Content はい いいえ 35 g/liter
  • DOWSIL™ Primer-C
    A solventbased silane adhesion promoter for use in construction applications for painted surfaces.

  • DOWSIL™ 795 Silicone Building Sealant
    A one-part, cold-applied, non-sagging silicone material that cures to a medium modulus silicone rubber upon exposure to atmospheric moisture.

  • DOWSIL™ 791 Weatherproofing Sealant
    A one-part, medium-modulus, elastomeric sealant designed for general weathersealing. It is a silicone formulation that cures to a flexible and curable silicone rubber building joint seal.

  • DOWSIL™ 790 Silicone Building Sealant
    A one-part silicone formulation that cures in the presence of atmospheric moisture to produce a durable, fire-resistant, flexible and ultra-low-modulus silicone rubber building joint seal.

  • DOWSIL™ 983 Structural Glazing Sealant Base and Curing Agent

    Designed for specialized use where dual structural and weatherseal applications are desired for factory glazing and curtainwall production. Once cured, this structural sealant forms a durable, flexible, watertight bond that can be warranted for 20 years and used in ±25% movement weatherseal applications. It has excellent unprimed adhesion to glass, alodine, and anodized aluminum1, although DOWSIL™ Primer-C OS is recommended for fast and consistent adhesion, especially to high-performance substrates approved for architectural structural glazing applications.



DOWSIL™ Contractors Weatherproofing Sealant

DOWSIL™ Contractors Weatherproofing Sealant


DOWSIL™ Contractors Weatherproofing Sealant
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