How to Apply Silicone Sealer to Avoid Windows Infiltration?

Posted on 03th, Jul 19

To avoid problems caused by excessive rainfall, it is important to seal window leaks, the main focus of infiltration, with silicone-based sealants, a suitable material for the frame seal, gutters, expansion joints and facades. The use of silicone at the ends of an external window eliminates 90% of infiltrations

How to apply silicone sealer to avoid windows infiltration

The silicone seal is resistant to thermal expansion and contraction, wind oscillations and seismic movements and does not represent high costs. Silicone sealants are easily found in building material stores and are often marketed in tube type containers with a dispensing nozzle, which facilitates the application process.

Prior to application, check the surface type to choose the ideal silicone sealant and ensure its performance. In the case of concrete and aluminium, the most indicated products are the neutral cure. Acetic curing sealants (which release vinegar odour) should be avoided in concrete or cement applications.


Step by step:

  • Before applying the sealant, it is necessary to identify exactly where the infiltration is occurring and to ensure that it is dry and clean.
  • Secure the edges with an insulation tape to ensure a good finish.
  • Then apply a layer of sealant to the sill (between the frame and the wall) of the window or to the infiltrating points. Use a spatula to ensure that voids are filled.
  • To finish, remove the ribbon. The total cure of silicone sealant occurs within seven days, however, the site can be used 24 hours after application.