SLAVYANKA roofing mastic is intended for repairing roofs of any type, junctions and flashings, and for building new mastic roofs reinforced with glass fabric or polyester. A new poured roof is finished with a thin coat of mastic dressed with gravel or slate chips. The material elongates by 1,500 %, is UV resistant, adheres to metal with a strength of 1.3 MPa and stays flexible down to −50 °C. The mastic is also used to bond polyurethane foam, glass wool and mineral wool insulation and to waterproof damp non-residential rooms.
| Manufacturer | Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora |
|---|---|
| Type | mastics and liquid membranes |
| Use | roofs, interiors |
| Base | one-component cold-applied solvent-based bitumen-polymer mastic (bitumen, solvent, polymers) |
| Colour | black |
| Packaging | 17 kg metal buckets |
| Application method | substrate dry and ventilated; if necessary, dilute with solvents up to 20 %; stir with a drill; apply by stiff brush, spatula, roller, spraying or pouring; repairs — with glass fabric or polyester reinforcement; new poured roof — 2 mm coat, after drying a thin coat dressed with gravel or slate chips (2…3 kg/m²); in hot weather in coats of up to 0.5 mm in 4…5 passes |
| Application temperature | surface and air −10…+50 °C; mastic not lower than +15 °C |
| Curing | tack-free for a 2 mm coat 24 h (+20±2 °C, relative humidity not more than 60 %); rain resistance after 1 h |
| Key properties | nominal tensile strength 1.0 MPa; elongation at break 1,500 %; bond strength to concrete 0.3 MPa, to metal 1.3 MPa; shear strength of the adhesive bond (7 days) 7.0 kN/m; water absorption over 24 h 0.2 %; flexibility on a R5 mm bar −50 °C; Fraass brittleness −60 °C; heat resistance +110 °C; water-tightness at 0.03 MPa for 72 h — no wet spot; solids content 55 %; density 0.9 kg/dm3; nominal viscosity 180…230 mm; chemical resistance at pH 2 and pH 13 — resistant; resistance to UV irradiation 35 W/m² for 360 h; service −60…+110 °C |
| Layer thickness | new roof — 2 mm dry film |
| Consumption | 1.55 kg/m² per 1 mm dry film |
| Shelf life | 3 years from the date of manufacture; store at no higher than +50 °C, away from direct sunlight |
| Standards | TU 5775-003-11149403-2001; compliance with GOST 30693; G4, V3, RP4 (NPB 244-97) |
Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.
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