SLAVYANKA two-component polyurethane sealant “Winter” — for joints in frost

For sealing joints in the cold season, a “Winter” version of SLAVYANKA two-component polyurethane sealant is produced; it is applied at air temperatures from −20 to +15 °C. The mix keeps its pot life for at least 6 h and polymerises on average in 48 h at +15 °C and in 7 days at −20 °C. Its purpose is the same as that of the standard version: expansion and panel joints, butt joints of reinforced concrete, window and door joints, pipe penetrations and concrete floor joints. The cured sealant withstands 25 % joint movement, elongates by 600 % and works from −65 to +90 °C.

Specifications

Manufacturer	Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora
Type	joint sealants
Use	joints and junctions
Base	two-component polyurethane sealant for work at sub-zero temperatures down to −20 °C: component 1 — white paste (can be tinted), component 2 — transparent viscous liquid
Colour	standard: white 01 (RAL 1013), grey 02 (RAL 7046), light grey 09 (RAL 7004); to order: light blue, green, yellow, brick red, pink, lilac
Packaging	12.5 kg kit: component 1 — 11.25 kg euro bucket, component 2 — 1.25 kg container (placed inside the bucket)
Application method	remove old sealant and loose concrete, treat the joint walls with a milling cutter; joint depth to width ratio 1 : 3, minimum joint width 10 mm; clean, dry with a gas or infrared torch; pour all of component 2 into component 1 and mix for 6…8 min with a low-speed drill of at least 1.2 kW (paddle 80 mm); place a non-adhesive foamed polyethylene backer rod in the joint; apply with a spatula in a layer of at least 3 mm per pass; do not apply on surfaces with free moisture; dilution is not permitted; do not use on bitumen and bitumen-polymer substrates
Application temperature	air −20…+15 °C, no precipitation (above +15 °C — standard SLAVYANKA)
Curing	pot life at least 6 h at +6±1 °C; full polymerisation on average 48 h at +15 °C and 7 days at −20 °C
Key properties	joint movement capability 25 %; consistency 30 mm; pot life at least 6 h; sag resistance 2 mm; cohesive failure; nominal tensile strength at break (+20 °C) 0.5 MPa; elongation at break (dumbbell specimens, +20 °C) 600 %; Fraass breaking point −65 °C; nominal stress at 100 % elongation 0.5 MPa; bond strength to concrete 0.6 MPa, to metal 0.5 MPa; water absorption over 24 h 0.5 % by weight; density 1.4±0.1 kg/l; service −65…+90 °C; UV resistance
Layer thickness	layer at least 3 mm per pass; joint width at least 10 mm
Consumption	0.27 kg/linear m (joint 24 mm × layer 8 mm); R = A × B × ρ / 1,000 (ρ ≈ 1.4 kg/l)
Shelf life	12 months from the date of manufacture; store at no higher than +30 °C, away from direct sunlight and heating appliances
Standards	STO 11149403.003-2025; compliance with GOST 25621-2023

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