SLAVYANKA polyurethane mastic “Winter” — for work down to −20 °C

The winter modification of SLAVYANKA polyurethane mastic is designed for the cold season: the air during application can be from −20 to +10 °C, and the surface from −20 to +20 °C. At +5 °C the mix remains workable for at least 2 h and fully polymerises within 48 h at most, and the interval before the next coat is from 8 h to 7 days depending on temperature. The finished coating elongates by at least 500 % and works from −65 to +110 °C. The mastic is used on buried structures, in wet rooms under tiles and in expansion joints of concrete floors.

Specifications

Manufacturer	Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora
Type	mastics and liquid membranes
Use	foundations and basements, interiors, joints and junctions
Base	two-component polyurethane compound for work at sub-zero temperatures down to −20 °C: component 1 — white paste (can be tinted), component 2 — transparent viscous liquid
Colour	white; tinting to the RAL-K7 catalogue
Packaging	27.8 kg kit: component 1 — 25 kg (20 l) steel bucket, component 2 — 2.8 kg (2.5 l) plastic bucket
Application method	surface moisture not more than 8 %; do not apply on bitumen and bitumen-polymer substrates; pour all of component 2 into component 1 and mix for 5…7 min with a drill of at least 1.2 kW (paddle 80…120 mm); dilution with solvents not more than 10 % and no later than 20 min after mixing; mechanised — piston units (Graco Airlessco HSS 9000, Wagner HC 960 or equivalent) at 100…150 bar, tips 0.027…0.031 inch; by hand — roller or brush, on horizontal surfaces by pouring; lay tiles after full polymerisation with a coating thickness of no more than 2 mm; before use at low sub-zero temperatures, keep the material for at least one day at a temperature not higher than +10 °C
Application temperature	air −20…+10 °C, no precipitation; surface −20…+20 °C; mastic −20…+10 °C
Curing	pot life at least 2 h at +5 °C (60 %); rain resistance after 1 h; full polymerisation of a 2 mm coat not more than 48 h at +5 °C; interval before the next coat from 8 h to 7 days depending on temperature
Key properties	density of the mix 1.2 kg/dm3; solids content at least 80 %; tensile strength 0.6 MPa; elongation at break at least 500 %; bond strength to metal and concrete at least 0.6 MPa (cohesive failure); Shore A hardness 30; water absorption over 24 h not more than 0.5 %; water-tightness at 0.01 MPa for 24 h — no wet spot; flexibility on a R5 mm bar −60 °C; Fraass brittleness −65 °C; heat resistance (5 h) +110 °C; short-term 250 °C (60 min); service −65…+110 °C; solar reflectance index SRI (RAL 9010) 99 %; chemical resistance: HCl pH 2 — 10 days (20 °C), KOH 8 % — 15 days (50 °C), H2O — 30 days (70…90 °C); compliance with EN 1504-2:2004
Layer thickness	per pass: vertical 1…2 mm, horizontal 1…4 mm (recommended 2 mm) dry film
Consumption	1.3 kg/m² per 1 mm dry film
Shelf life	12 months from the date of manufacture; store at no higher than +35 °C, away from direct sunlight and heating appliances
Standards	TU 5775-042-11149403-2016; compliance with EN 1504-2:2004

Data from the manufacturer’s technical data sheet. The coating system, number of coats and quantity are selected for your project on request.