Description
Roof urethane-rubber mastic is a self-curing system that is made from liquid rubber basis and isocyanate hardener, which are mixed by a consumer before application. It is manufactured according to new domestic technologies.
Additional info
Preparation of the surface:
Concrete surface before treating with mastic should be polished (in order to delete contamination and cement milk), cleaned from sand and flattened with mastic ZHKMk.
Preparation of the mastic:
Before application, the base of mastic is thoroughly mixed with hardener in ratio 7 w.p. of hardener and 100 w.p. of base (or according to certificate of analysis of the product). If necessary, it is diluted with solvent P-4, P-5, white-spirit, benzene in order to get application viscosity 30-45 сс. in case of laying using hydraulic spraying method.
ATTENTION! Time of working life of mastic at 20 °С is up to 2h.
Laying:
Mastic is laid with brush, roller, and in bulk.
Ground coat is laid on the roof surface, then the first layer of mastic, at which layer of fiberglass mesh SSK-100 or glassfibre TG-140 is put. The filling mastic layer is put on glassfibre, then– front layer. After putting front layer, light-reflected felt is put.
Application of mastic is possible without glassfibre.
Polymerization of each layer is realized at normal temperature during 24 hours.
Usually, hardened mastic is a rubber-polymeric material in 24 hours. It connected with concrete or old covering firmly (during repairing works). In case of application of glassfiber, the solid mat of glassruberoid without joints (view – a smooth surface) is created.
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Applications
Mastic is used for covering new roofs and repair of old ones. Materials that can be treated: concrete, ruberoid, between layers of ruberoid, concrete with fiberglass, ruberoid with fiberglass, metal, and wood.
Advantages over other roof materials:
1. after treating, covering is solid rubber-urethan mat without joints that differs it from any other roll material, as leaks appear usually on joints because of buckling, cavities, and change of temperature.
2. covering made from mastic ZHKMk belongs to the materials flame spread group of which is RP1 and flammability group is G1.
3. it is not necessary to spread gravel on covering on the basis of the mastic.
4. there are all necessary allowing documents for its using in the areas of increased control.
5. technological operation, burning in, is absent during treating with mastic .
6. high indexes of adhesion of covering to the roof basis.
7. high indexes of percent elongation and tear strength.
8. covering is elastic at -35°С to +105 °С.
9. covering is resistant to influence of ultra-violet radiation. Shelf life
Shelf life - 12 months.
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