Skylight / Roof Silicone Sealant

What is Roof Silicone Sealant?

Roof silicone sealant is a product that can be applied to roofs to seal them against the weather. This product is commonly used on flat roofs because standing water on the roof can eventually lead to leaks during the winter. Silicone roof sealants for sloped roofs are also available, along with specialty products that are designed to go with roofing products such as shingles. Using a silicone roof sealant can extend the life of a roof and confer other benefits.

How to Apply a Roof Silicone Sealant?

Step 1: Inspect the roof, looking for cracks and gaps that may be causing leaks. Remove any flaking from the current roof coating with a wire brush. Look closely around seams and sweep away the debris with a broom.

Step 2: Look over the roof and remove any loose debris and reattach any screws that are sticking up from the roof. Check for mildew spots and treat them by rinsing them with chlorine bleach.

Step 3: Wash the roof thoroughly with a garden hose. Verify that there are no puddles forming. These puddles can form if the house is not level, there is an indentation in the roof surface or if the gutters are clogged. Dry off the roof with clean rags.

Step 4: Cover all seams and edges of flashing with patching cement using a stiff-bristle paintbrush. Overlap all of the seams by 1 inch and also cover any screw heads. Be sure to cover all roof seams, flashing, and J-rail because these are the three areas where most of the leaking occurs. Let the patching cement dry for at least one hour.

Step 5: Mix the roof coating and begin applying with a roof brush. Brush over the entire area of the roof and carefully follow the instructions on the label for proper coverage. Start on one end of the roof and work toward the other side. Do not apply too thick of a coat as it will dry and crack over time. 





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