Impermax Polyurea H: Hot-Spray Polyurea Roof Membrane
Impermax Polyurea H is a two-component polyurea membrane, free of solvents and mineral fillers, hot-sprayed to form a continuous, elastic waterproofing layer – a proven hot-spray polyurea roof membrane.
- Product: Impermax Polyurea H
- Application: hot-spray waterproofing
- Mix: A=1 : B=1.05 by weight / 1:1 by volume
- Gel time: 8–9 s at 25 °C
- Colours: light grey, dark grey, rust red, blue
01 · Uses
Uses of a hot-spray polyurea roof membrane
- Roofs, terraces and balconies over concrete, metal, bituminous and prefabricated membranes, using the appropriate primer.
- Waterproofing and protection of concrete structures, especially those exposed outdoors.
- Protective topcoat over polyurethane insulation foam, and waterproofing of foundations and buried structures.
Case study: nursery school roof with Impermax Polyurea H. Spraying it over foam? Start with our spray polyurethane foam guide.
02 · Application
Application of Impermax Polyurea H
Mix ratio is A=1 : B=1.05 by weight (1:1 by volume), with a reference spray rate of 2 kg/m² and a gel time of 8–9 s at 25 °C. Recommended temperatures are 60 °C for component A, 70 °C for component B and 65 °C for the hose, at a pressure of at least 135–170 bar.
Technical datasheet: Impermax Polyurea H TDS (PDF) · Polyurea waterproofing systems
03 · Technical data
Impermax Polyurea H technical data (TDS values)
Elongation at break
400%
Tensile strength
15 MPa
Shore hardness
90A/40D
Reference spray rate
2 kg/m²
Technical data
- Hardness (Shore): 90A/40D (ISO 868)
- Elongation at break: 400%
- Tensile strength: 15 MPa (EN-ISO 527-3)
- Tear strength: 69 N/m (ISO 34-1, method B)
- Crack-bridging: static A5 at -10 °C; dynamic B4.2 at 23 °C (EN 1062-7)
- Abrasion: 25 mg (Taber, CS17, 1000 c, 1 kg)
- Dielectric strength: 17.6 kV/mm (IEC EN 60243-1:2013)
- Adhesion: 5.6 MPa on concrete (EP 100 primer); 3.6 MPa on steel (PU primer)
- Vicat softening point: 103 °C (EN-ISO 306)
- Thermal conductivity: 0.1897 W/(m·K) at 22 °C (EN 22007-2)
Approvals
- ETA 11/062: W2 for 10 years without topcoat, W3 for 25 years with Impertrans Pigmented; includes root-penetration resistance to EN 13948
- Reaction to fire: Cfl-s1 (EN 13501-1)
- External fire: Broof(t1) and Broof(t2) (EN 13501-5)
- Hail resistance (EN 13583)
- Environmental Product Declaration EPD-IES-0020897
04 · Performance
Impermax Polyurea H performance
Hardness is 90A/40D (ISO 868), elongation at break 400%, tensile strength 15 MPa (EN-ISO 527-3) and tear strength 69 N/m (ISO 34-1).
The water vapour resistance factor is μ = 2000 (14 g/m²·day, EN 1931). Crack-bridging is static class A5 at -10 °C and dynamic class B4.2 at 23 °C (EN 1062-7). For roof specification trade-offs, read pure polyurea vs hybrid on roofs.
Application data
- Mix ratio: A=1, B=1.05 by weight; A=1, B=1 by volume
- Gel time (A+B, 20 g): 8–9 s at 25 °C, 4–6 s at 60 °C
- Recommended temperatures: component A 60 °C, component B 70 °C, hose 65 °C
- Spray pressure: at least 135–170 bar
- Spray rate: 2 kg/m² (reference)
- Return to service (25 °C, 50% RH): rain-resistant after 15 min, light foot traffic after 1 h
05 · FAQ
Impermax Polyurea H: frequently asked questions
What approvals does Impermax Polyurea H hold?
ETA 11/062 (W2/10 years without topcoat, W3/25 years with Impertrans Pigmented), Cfl-s1, Broof(t1) and Broof(t2), hail resistance and an EPD.
Can it be sprayed over polyurethane foam?
Yes – the datasheet lists it as a protective topcoat over polyurethane insulation foam.
What spray settings are recommended?
Component A at 60 °C, component B at 70 °C, hose at 65 °C, and at least 135–170 bar.
More Impermax and Rayston polyurea products
Every product page in this series is based on its official Krypton Chemical technical datasheet.
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