For the cartridge grade, a 1/4" bead is a minimum. (You need enough sealant mass to stretch and compress with roof movement.) Embed a seam sealing tape in Through The Roof!™ for repairing large holes and cracks.

Sizes and coverage
• Cartridge 10.1 oz. (300 ml) - gun grade 1/4" bead seals 31 linear feet
All sizes come in clear.

Sealing valleys
Tile and shake roofs often have metal valleys. When hard rain hits, it can run into the valley from one side and splash up the other side going under the tiles or shakes. Apply Through The Roof!™ cartridge grade along each side of the valley. Make sure you use enough material to fill the gaps and get good contact between the metal valley and roof material. Clear Through The Roof!™ leaves an attractive seal on metal and shake roofs.

Sealing gutters and downspouts
Cartridge grade is best to seal end caps and joint seams prior to assembly. Brush grade is used for coating over leaks in existing gutters. For best results, dry off repair area. Make sure to clean rusted areas thoroughly and brush Through The Roof!™ in a large enough area to overlap onto non-rusted metal. If holes are large, use a mesh-type seam tape putting it on in sandwich fashion: sealant undercoat - cloth - sealant topcoat.

Fix broken tile
Use Through The Roof!™ to repair cracks and breaks. Apply liberally to the broken edges and join. Spread squeeze out material at least 1" on either side of crack to assure a good seal. Front edges of flat tile may be glued down with Through The Roof!™.

Reduce ice dams with under-the-roof-deck sealing
Warm air that leaks out of your roof around vents, etc., is called a "warm-air bypass." This melts snow which runs down and re-freezes on the eave, causing a roof-damaging ice dam. The best way to prevent these is to seal penetrations from the attic side, but watch those roofing nails! If the gap is 1/2" or larger, put foam backer rod in the cavity and caulk over it. Backer rod gives a solid surface to put Through The Roof!™ against and saves on material.

Seal air conditioners and skylights
Seal between ductwork and air conditioning units as well as the flashing around ductwork. For skylights, Through The Roof!™ can be used to seal between frame and plastic as well as between the roof and the frame.

Back to Through the Roof Application Guide