How To Apply White Cement On Roof

Concrete masonry and other absorbent surfaces may need a coat of primer before application.

How to apply white cement on roof.

Rubberized for improved flexibility and durability. It is best to work in small areas rather than try to do all at once. It forms a tough film that won t become brittle and crack in the coldest weather or run and sag in the hottest. Apply from 0 f to 120 f 18 c to 49 c 100 wet surface adhesion per astm d3409 standard test method for adhesion of asphalt roof cement to damp wet or underwater surfaces.

For sealing down shingles or flashing use around a quarter to half inch thick layer of roofing cement. When patching a roof blister open the blister and allow it to dry thoroughly before applying roof cement. Apply cement up to 1 2 inch thick when sealing flashing. Using elastek 103 crack joint sealant and reinforce with polyester roof fabric as necessary.

Avoid using plastic roof cement. This will enable you more control. This surface preparation ensures that the cement has the ideal surface to bond to. No blistering sagging or sliding per astm d4586 standard specification for asphalt roof cement.

10 year limited. Roofers choice 15 plastic roof cement is a trowel grade sealant for dry surfaces. Made from heavy bodied asphalt it spreads easily. Roofing cement can be use to seal a roof and to fix tiles shingles roll asphalt and any other roof material.

Serious ponding should be referred to a roofing contractor. Apply roof cement with a trowel going to a depth of about 1 8 inch. If you have larger holes or fissures in the roofing you may need to install rolled roofing or other fabrics first before sealing it over with. Old patches of roof cement should be removed and rust should be cleaned from metal surfaces.

For roof blisters bust the blister open and make sure it s dry first before applying the cement.