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WETISOL LAM 361 — polyurethane mastic for seamless waterproofing
Wetisol (INGRI)

WETISOL LAM 361 — polyurethane mastic for seamless waterproofing

Mastics and liquid membranes

Seamless waterproofing by hand — with a roller, brush or spatula — is done with the two-component solvent-free polyurethane mastic WETISOL LAM 361. It is suitable for precast and monolithic reinforced concrete structures, foundations, screeds, floor slabs and artificial water bodies, protects metal and concrete against corrosion and is used for local repair of waterproofing, including polyurea. Adhesion to concrete is at least 2.0 MPa, to metal at least 5.0 MPa, and cracks in the substrate up to 0.5 mm are bridged. The mastic is resistant to acids, alkalis and solvents and is produced in five basic colours.

Specifications

ManufacturerWetisol (INGRI) — OOO “Ingri”
Typemastics and liquid membranes
Usefoundations and basements, tanks and pools
Basetwo-component polyurethane mastic for seamless waterproofing coatings; contains no volatile organic compounds or solvents
Colourbasic colours: beige, grey, green, red-brown, black; comp. B — dark brown liquid
Packagingkit A+B 0.8 kg, 4 kg, 16 kg in sealed metal containers (cans, buckets)
Application methodseamless waterproofing on concrete and metal substrates: precast and monolithic reinforced concrete structures, foundations, screeds, floor slabs, artificial water bodies; anti-corrosion protection of metal and concrete; local repair of waterproofing, incl. polyurea; exterior and interior works, temporary shelters; concrete — shot blasting or milling, remove laitance and old coatings (including topping), remove dust, open up cracks, form expansion joints; under the substrate — waterproofing against capillary moisture; metal — degrease (degree 1 per GOST 9.402), abrasive blast cleaning to Sa 2½ (Sa 2 permitted, manual to St 2), roughness 20–40 µm per ISO 8503-2; primers: indoors — WETISOL S-CP 0.35 kg/m² broadcast with quartz sand 0.1–0.3 mm, outdoors — WETISOL S-MP3 0.2 kg/m², metal — S-MP3 0.1 kg/m² or S-MP2 0.4 kg/m²; condition the components for 24 h at not below +15 °C; mix comp. A for 2–3 min (up to 500 rpm), pour in B in a stream, 2–3 min, transfer, add quartz sand if necessary, 2–3 min (no more than 4 min after adding B); A:B = 3.84:1 by weight; do not add solvents or thinners; apply with a roller, brush or spatula immediately after mixing, after 3–5 min roll with a spiked roller; filler LAM 361 : quartz sand 0.1–0.3 mm = 1:2–1:4; reinforcement with geotextile and geogrids of 100–300 g/m² is permitted; do not apply to a damp surface; UV topcoat — Wetisol Spray 400 UV 0.25 kg/m² in 2 passes; tool cleaning — Wetisol S-Wash or solvent 646
Application temperatureair and substrate +5…+30 °C (+15…+25 °C recommended); material +17…+25 °C; relative air humidity max 80%; substrate moisture max 5.0 wt. %; substrate 3 °C above the dew point; do not heat the components with an open flame or above +35 °C
Curingpot life at least 30 min at +20±3 °C; gelation 25–30 min; drying to degree 3 max 5 h; light load ~12 / 8 / 6 h, foot traffic ~3 / 2 / 1 days, full load ~10 / 7 / 5 days at +10 / +20 / +30 °C; full cure 7 days; recoat interval 7–72 h at +5 °C, 6–48 h at +10 °C, 5–36 h at +20 °C, 4–24 h at +30 °C (at +20±2 °C and 60±5% — 12–48 h); overcoating with Spray 400 UV: 8–72 / 6–48 / 4–36 / 3–24 h; if the interval is exceeded — grinding, dust removal, degreasing or an intermediate coat of WETISOL S-MP3
Key propertiesShore D hardness (7 days) at least 30 (GOST 24621); relative elongation at break at least 60% (GOST 11262); tensile strength at break at least 5.0 MPa (GOST 11262); adhesion to concrete at least 2.0 MPa, to metal at least 5.0 MPa (GOST 28574); membrane watertightness (S=2 mm, 24 h) at least 2.0 kgf/cm² (GOST 2678); bridges cracks in the substrate up to 0.5 mm; pot life at least 30 min (per the TU method); drying to degree 3 max 5 h (GOST 19007); resistance to solvents, acids and alkalis; service temperature from −50 °C to +80 °C (short-term up to +130 °C)
Layer thickness1.0–6.0 mm; design membrane 2.0 mm
Consumptiontheoretically 1.16 kg per 1 mm of thickness; 2.0 mm membrane — 2.2 kg/m²
Shelf life6 months from the date of manufacture in undamaged original containers at +5…+25 °C
StandardsTU 20.30.22-067-94613022-2019; STO 982-780-81-001-2022 “Anti-corrosion waterproofing coating of the Wetisol series”; STO 89996-822095-2023 “Company standard. Materials of the Ingri company”; fire safety G1, V1, RP1 (Federal Law No. 123-FZ of 22.07.2008)

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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