Applying Dow 795 Silicone Building Sealant

Step 1: Preparation

Clean all joints and remove all foreign substances and contaminanted materials such as grease, oil, dust, water, frost, surface dirt, existing sealants, glazing compounds and protective coatings.

Step 2: Application

  • Install sof-rod or open cell backer rod material to avoid air bubbles from forming after skinning or, install setting blocks, spacer shims and tapes.
  • Mask the areas that are adjacent to the target joints to ensure neat sealant lines.
  • A primer is generally not required on non-porous surfaces, such as, glass, metals, stainless steel, steel, aluminum and chrome, to name a few, but may be necessary for optimal sealing of certain porous surfaces.
  • A test application is always recommended.
  • Apply Dow 795 Silicone Building Sealant in a steady motion using continual pressure.
  • The silicone sealant can be applied using many varieties of air-operated guns, most types of bulk dispensing equipment and standard caulking guns.
  • Before a skin forms, which usually occurs within 15 minutes after dispensing, tool the sealant with light pressure to spread the adhesive against the backing material and joint surfaces.
  • Remove the masking tape once the bead line is spread.

Step 3: Longevity and Storage

When stored at or below 80 degrees F, Dow 795 Silicone Building Sealant will have a shelf life of 12 months from the date of its manufacture. Refer to the product's packaging for “Use By Date.”


Dow 795 Silicone Building Sealant should not be used:  

  • In structural applications without prior review and approval by a Dow Sales Application Engineer
  • In below-grade applications
  • When surface temperatures exceed 122°F during application
  • On those surfaces that are continuously immersed in water
  • On building materials that bleed oils and solvents that may affect adhesion, on frost-laden or wet surfaces and in totally confined joint areas since the sealant requires atmospheric moisture for it to cure.
  • If the sealant is intended to be painted since paints do not typically adhere to most silicone sealants
  • To apply to surfaces in direct contact with food or other food-grade applications

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

DISCLAIMER: These instructions are from the product manufacturer. PK Supplies Inc. makes every effort to ensure that these instructions are accurate. By following these instructions you agree that PK Supplies Inc. is not liable for any damages or losses caused by these instructions.

Instructions can be used for...