DOWSIL™ 757 Photocatalytic Clean Glass Weatherproofing Silicone Sealant

MS Polymer

DOWSIL™ 757 Weatherproofing Sealant is a low modulus sealant designed for weather sealing of the hydrophilic and photocatalytic clean glasses where high movement is expected and high weather resistance is required in order to withstand increased temperature and UV radiation.

Product info


  • Excellent adhesion with typical photocatalyti and hudrophilic glasses as well as standard glass, aluminium, metal, painted and unpainted wood
  • Ideal for expansion, connection, perimeter and other movement joints
  • Very good combination of weather resistance and movement capability

Substrate Type

  • Glass
  • Toughened Glass
  • MDF
  • Timber
  • Stained Timber
  • Painted Timber




Technical Information

Where to use Exterior
Paintable Yes
Time to cure 10 days
Container Type Cartridge
Shelf life 1 year
Sizes 290 ml
Application method Sealant Gun and Cartridge


Surface Preparation

Clean all joint cavities, removing all foreign matter and contaminants from substrates such as grease, oil, dust, water, frost, surface dirt, old sealants or glazing compounds and protective coatings. Joints to be sealed should be dry and moisture free.

Application Instructions

Apply DOWSIL™ 757 Sealant and tool it within 30 minutes or before a cured skin forms to ensure good contact with between the sealant and the substrate. Tooling of the sealant also gives a smooth professional finish. Remove the masking tape as soon as the bead is tooled.

Clean up

In areas where uncured sealant is inadvertently applied to adjacent surfaces, the sealant should be cleaned from surfaces before curing, using a good quality alcohol-based solvent.

Quantity Estimator

Enter joint dimensions below to estimate number of cartridges required


You will require x cartridge