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Khimtrast PM Standard polyurea — sprayed waterproofing membrane
KHIMTRAST

Khimtrast PM Standard polyurea — sprayed waterproofing membrane

Polyurea

The basic grade of the PM system is a two-component polyurethane-polyurea applied only with high-pressure rigs at 150–250 bar. The membrane is installed on roofs, foundations, in vessels, pools and artificial water bodies, and on metal in the zone of alternate wetting and immersion. Initial cure takes less than 30 s, foot traffic is allowed after 1 h; tensile strength 18–20 MPa, elongation 350–450%, adhesion to concrete 2.24 MPa, service from −50 to +80 °C.

Specifications

ManufacturerKhimtrast — AO “Khimtrast”, Nizhnekamsk
Typepolyurea
Useroofs, foundations and basements, tanks and pools
Basetwo-component sprayed polyurethane-polyurea: component A — polyamine hardener (homogeneous liquid or suspension, Brookfield viscosity at 25 °C 1,200–1,700 mPa·s, density 0.97–1.04 g/cm³), component B — isocyanate-based prepolymer (colourless to yellow liquid, 500–1,500 mPa·s, 1.10–1.16 g/cm³)
Packagingcomponent A: 200 kg, 50 kg, 20 kg; component B: 220 kg, 50 kg, 20 kg
Application methodspraying only with high-pressure rigs at 150–250 bar (brush, roller, squeegee and paint sprayers are unsuitable); ratio A:B = 100:100 by volume; mix component A thoroughly before use; preliminary coat of about 0.5 mm with a 5 min wait; the next coat no later than 12 h, with an interval of more than 12 h — Primer-PM (1K) or Primer-PM (2K) dried to degree 3; after 24 h Khimtrast PU Enamel for polyurea is recommended for UV protection; recommended rigs: Graco Reactor 2 E-XP2, 2 H-XP2, 2 H-XP3, Reactor 3 E-XP1, 3 E-XP2, Gama EVOLUTION G-250H, G-35H, G-50H, Proton E-6ms, PUSMAK KPX 20+, KPX 40, KPX 50 (not recommended: Graco E-10hp, Reactor 2 E-XP1, Gama Spray Hydraulic, Proton E-6); cleaning — acetone, ethyl cellosolve, dimethylformamide; temperature of component A 65–70 °C, component B 50–60 °C, hoses 65–70 °C; concrete — abrasive blasting or mechanical treatment (grinding, milling), dust removal, repair of defects with cement compounds or Primer-PM (2K) with quartz sand 0.1–0.3 mm (1:3 or 1:4 by weight), priming with Primer-PM (1K) or Primer-PM (2K), concrete moisture max 6%; metal — Sa 2.5 or St 3 (ISO 8501-1), roughness 60–150 µm (ISO 8503-2), dust level per ISO 8502-3 reference 2 or 3, within 8 h Khimtrast PM Metal Primer 1K (in some cases application without primer is permitted); wood — free of dust and oils, residual moisture max 8%; old roof — cleaning, opening up and removal of defective areas, filling, Primer-PM (1K) or a thin layer of PU foam with a density of at least 40 kg/m³; over PU foam with a density of at least 40 kg/m³ (e.g. Khimtrast SKN-40 G3) — after 24 h, remove dust and degrease
Application temperaturepolyurea application from −20 to +35 °C (positive temperatures recommended); substrate at least 3 °C above the dew point; air humidity max 85% (max 75% when working with primers); Primer-PM (1K) — from −10 to +30 °C, Primer-PM (2K) — from +15 to +30 °C
Curinginitial cure less than 30 s at 20 °C; foot traffic after 1 h, vehicle traffic after 168 h (7 days)
Key propertiesnominal tensile strength 18–20 MPa; relative elongation at break 350–450%; Shore A hardness 85–95; watertightness at a hydrostatic pressure of 0.3 MPa (exposure at least 24 h) — no signs of water penetration; water absorption in 24 h max 2 wt. %; Taber abrasion resistance (H-18, 1,000 rev) 47 units; adhesion: concrete 2.24 MPa, concrete + Primer-PM (1K) 3.50 MPa, steel St3 or Sa½ 2.77 MPa; service temperature from −50 to +80 °C; resistance to water, weak solutions of acids, alkalis and salts, short-term — to motor oil and diesel fuel; application rate up to 800 m² per day
Layer thickness2 mm — for waterproofing; 3 mm — for coatings subject to impact and abrasive loads; preliminary coat about 0.5 mm
Consumptiontheoretical, in one coat: 1.1 kg/m² at 1 mm, 2.2 kg/m² at 2 mm, 3.3 kg/m² at 3 mm (laboratory; actual consumption is 5–40% higher)
Shelf life6 months from the date of production; storage and transport at +10…+30 °C in closed original packaging away from moisture and sun; use up opened containers completely or purge component B with dry nitrogen or argon
StandardsTU 20.16.56-091-27903090-2021 (amend. No. 1, 2, 3); voluntary certificate of conformity ROSS RU.32001.04IBF1.OSP28.91050, 15.12.2025–14.12.2028 (grades PM Standard, PM Hard, PM Premium, PM (Hard) Premium)

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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