SLAVYANKA insulating mastic — bitumen-polymer mastic against moisture and corrosion

SLAVYANKA insulating mastic is chosen when an underground structure needs not only waterproofing but also protection against soil corrosion, electrocorrosion and stray currents. It is used to coat trunk pipelines, the outside of tanks, foundations and other underground structures, welds and steel element entry points. The coating elongates by 500 %, withstands an impact of 6.0 J at +20 and −40 °C, resists 20 % solutions of sulphuric acid and caustic soda and complies with GOST R 51164-98. The mastic can be applied at air temperatures from −10 to +50 °C if the surface is heated to at least +5 °C.

Specifications

Manufacturer	Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora
Type	mastics and liquid membranes
Use	foundations and basements, tanks and pools
Base	one-component cold-applied solvent-based bitumen-polymer mastic (bitumen, solvent, polymers, filler, rheological additives)
Colour	black
Packaging	metal buckets of 10, 20, 25 kg; 50 kg metal drums
Application method	clean metal with brushes, sandblasting or a grinder, repair concrete; remove moisture by heating; at sub-zero temperatures heat the surface above +5 °C; if the mastic has thickened, dilute with solvents up to 20 %; mix thoroughly; vertical surfaces — spatula, roller or airless spraying, horizontal surfaces — by pouring; reinforcement with glass fabric or polyester; in hot weather in coats of no more than 0.5 mm in 4…5 passes
Application temperature	air −10…+50 °C; surface at least +5 °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; adhesion check not earlier than after 48 h
Key properties	elongation at break 500 %; solids content 70 %; density 1.1 kg/dm3; bond strength to concrete 0.4 MPa (+20 °C), to metal 0.8 MPa (+20 °C) and 2.0 MPa (−15 °C); Fraass breaking point −30 °C; heat resistance +110 °C; water-tightness at 0.03 MPa for 10 min — no wet spot; chemical resistance: 20 % H2SO4, 20 % NaOH, 3 % sea salt — resistant; impact strength 60 kgf/cm (6.0 J) at +20 and −40 °C; transition resistance after 72 h in 3 % NaCl 10^10 Ohm·m²; dielectric continuity — no breakdown at 5 kV/mm
Layer thickness	recommended 2 mm dry film
Consumption	1.57 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 and heating appliances
Standards	TU 5775-016-11149403-2006; compliance with GOST R 51164-98; 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.