SLAVYANKA HardFlex — polymer mastic for foundations and roofs

SLAVYANKA HardFlex is a one-component cold-applied solvent-based mastic with divinyl-styrene and acrylic polymers as the binder. No substrate primer is needed, and the grey and white (ivory) colours make it possible to alternate coats and check the application. The coating bonds to concrete, metal and tile adhesive with a strength of 2.0 MPa, elongates by 300 %, is UV resistant and serves from −70 to +110 °C. It is used to protect foundations, piles and tanks, to build and repair mastic roofs other than galvanised ones, and to treat bridges and pipelines.

Specifications

Manufacturer	Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora
Type	mastics and liquid membranes
Use	foundations and basements, roofs, bridge structures, tanks and pools, interiors
Base	one-component cold-applied solvent-based polymer mastic (divinyl-styrene and acrylic polymers, mineral filler, process additives)
Colour	grey, white (ivory)
Packaging	20 kg metal buckets
Application method	substrate moisture not more than 4 %; no priming required; at sub-zero temperatures heat the surface above 0 °C; stir with a drill; dilution with solvents not more than 20 %; apply by roller, spatula, airless or air spraying, or by pouring; reinforcement with glass fabric and polyester; in hot weather in coats of no more than 0.5 mm in 4…5 passes; each subsequent coat is recommended in a different colour to check thickness; lay tiles after drying
Application temperature	air −10…+50 °C; surface above 0 °C; mastic not lower than +15 °C
Curing	tack-free for a 1 mm coat not more than 4 h (+20±2 °C, relative humidity not more than 60 %); rain resistance after 1 h
Key properties	nominal viscosity 140…180 mm; solids content 50 %; density 0.9 kg/l; nominal tensile strength 2.0 MPa; elongation at break 300 %; Shore A hardness 60; bond strength to concrete 2.0 MPa, to metal 2.0 MPa, to PU foam 0.8 MPa (failure in the PU foam), to cement-based tile adhesive 2.0 MPa; flexibility on a R5 mm bar −65 °C; Fraass brittleness −70 °C; heat resistance +110 °C; service −70…+110 °C; water-tightness at 0.03 MPa — no wet spot; water absorption over 24 h 0.4 %; residual deformation after 300 % elongation less than 3 %; chemical resistance at pH 2 and pH 12 — resistant; a 1 mm film withstands 10 kV; UV resistance
Layer thickness	recommended 1 mm dry film; new roof — 2 mm
Consumption	1.6 kg/m² per 1 mm dry film
Shelf life	36 months from the date of manufacture; store at no higher than +35 °C, away from direct sunlight
Standards	STO 111497403.001-2023; compliance with GOST 30693-2000; 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.