How To Apply White Cement On Roof

Apply cement up to 1 2 inch thick when sealing flashing.

How to apply white cement on roof.

For roof blisters bust the blister open and make sure it s dry first before applying the cement. Made from heavy bodied asphalt it spreads easily. Concrete masonry and other absorbent surfaces may need a coat of primer before application. It is best to work in small areas rather than try to do all at once.

This will enable you more control. Repair and seal roof penetrations tears open seams etc. Rubberized for improved flexibility and durability. When patching a roof blister open the blister and allow it to dry thoroughly before applying roof cement.

Apply roof cement with a trowel going to a depth of about 1 8 inch. Serious ponding should be referred to a roofing contractor. It forms a tough film that won t become brittle and crack in the coldest weather or run and sag in the hottest. Roofers choice 15 plastic roof cement is a trowel grade sealant for dry surfaces.

In larger or deep ponding areas apply elastek 500 puddle plaster to fill in areas that hold water. 10 year limited. Before applying plastic roofing cement the surface must be clean and dry. Old patches of roof cement should be removed and rust should be cleaned from metal surfaces.

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. No blistering sagging or sliding per astm d4586 standard specification for asphalt roof cement. This surface preparation ensures that the cement has the ideal surface to bond to. 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.