The modern roofing material market is quite diverse. Nevertheless bitumen-polymer mastics attract attention among other materials.
Physically, this compound is a liquid, viscous and uniform mass, which after surface application hardening becomes solid coating. Polymer bitumen roofing mastic is mostly used for construction and maintenance of roofs, as well as waterproofing.
Depending on application mode, there are hot and cold mastics. Hot mastics harden relatively fast. When treating well-prepared materials, several minutes are enough for strong and reliable setting.
There are two alternative approaches to the application of mastic. The first method involves heating the mastic to 160-180ºС and only then applying it by a brush or an applicator. The second method involves pouring a preheated mastic on the prepared surface then evening out the coating.
Roofing mastic combines the advantages of bitumen and polymer materials. It prevents the spread of fungus and mold, protects the base surface from moisture and adds strength to the coating. It can be applied in combination with concrete, metal, wood and other materials.
A roofing mastic contains bitumen, modified by polymer additives, and a filler. Before application, the surface must be cleaned from grease, dust and dirt, which may hinder reliable contact. If the base surface is porous, a special primer is applied. After the primer is dry, the mastic is applied on one of the surfaces.
Polymer bitumen mastics have the following advantages:
- no joins and seals on the roofing surface;
- high level of adhesion to any material;
- no blisters caused by moisture evaporation;
- simple application.