How To Apply White Cement On Roof

Serious ponding should be referred to a roofing contractor.

How to apply white cement on roof.

Roofers choice 15 plastic roof cement is a trowel grade sealant for dry surfaces. Apply roof cement with a trowel going to a depth of about 1 8 inch. It forms a tough film that won t become brittle and crack in the coldest weather or run and sag in the hottest. For sealing down shingles or flashing use around a quarter to half inch thick layer of roofing cement.

Using elastek 103 crack joint sealant and reinforce with polyester roof fabric as necessary. Concrete masonry and other absorbent surfaces may need a coat of primer before application. 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.

It is best to work in small areas rather than try to do all at once. Apply cement up to 1 2 inch thick when sealing flashing. Made from heavy bodied asphalt it spreads easily. Avoid using plastic roof cement.

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 roof blisters bust the blister open and make sure it s dry first before applying the cement. 10 year limited. This will enable you more control.

No blistering sagging or sliding per astm d4586 standard specification for asphalt roof cement. Roofing cement can be use to seal a roof and to fix tiles shingles roll asphalt and any other roof material. Repair and seal roof penetrations tears open seams etc. When patching a roof blister open the blister and allow it to dry thoroughly before applying roof cement.

In larger or deep ponding areas apply elastek 500 puddle plaster to fill in areas that hold water.