This SLAVYANKA two-component polyurethane sealant is applied with a spatula over a non-adhesive backer rod into expansion joints and butt joints of reinforced concrete, panel joints of facades and plinths, window and door joints, and pipe penetrations. It is also suitable for expansion joints of concrete floors and reinforced concrete road pavements that are not overlaid with asphalt concrete. The joint withstands 25 % movement, the material elongates by 600 %, is UV resistant and works from −65 to +90 °C. The standard colours are white, grey and light grey; other shades are made to order.
| Manufacturer | Rastro (LAKHTA, SLAVYANKA, Izhora) — ZAO “Rastro”, Bolshaya Izhora |
|---|---|
| Type | joint sealants |
| Use | joints and junctions |
| Base | two-component polyurethane sealant: component 1 — white paste (can be tinted), component 2 — transparent viscous liquid from light yellow to brown |
| 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 +5…+40 °C, no precipitation (below +5 °C — SLAVYANKA “Winter”) |
| Curing | pot life at least 6 h at +20±2 °C; full polymerisation on average 48 h |
| 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.
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