Knowledge · Polyurea

Impermax Cold Polyurea Supreme: Solvent-Free Cold Polyurea Membrane

Impermax Cold Polyurea Supreme is a two-component polyurea membrane applied cold by roller, trowel or squeegee. As a completely solvent-free cold polyurea membrane with low odour, it also works indoors.

01 · Uses

Uses of Impermax Cold Polyurea Supreme

Roofs, including car-park roofs with a protective layer, balconies and terraces.
Waterproofing over concrete, metal and prefabricated membranes such as bitumen, PVC and EPDM.
Water tanks and indoor wet areas such as kitchens, bathrooms and lift pits.
Repairs of hot-sprayed polyurea, hard-to-reach roof details, and filling of wide expansion joints.

Field example: the Reus roof waterproofed with Impermax Cold Polyurea Supreme.

02 · Application

How the solvent-free cold polyurea membrane is applied

The usual minimum is 2 kg/m² in a single coat on a flat substrate. Pot life is 30 min at 20 °C and 50% RH; air temperature should be between 5 °C and 35 °C with relative humidity below 70%.

The datasheet curing table gives 4 hours total at 20 °C / 50% RH. Light foot traffic is possible the next day, and complete curing (final resistance) takes about 5–6 days, depending on conditions. Where you choose between cold and hot systems, see hot-spray vs cold-applied.

Technical datasheet: Impermax Cold Polyurea Supreme TDS (PDF) · Polyurea waterproofing systems

03 · Technical data

Impermax Cold Polyurea Supreme technical data (TDS values)

Elongation at break

>950%

Max. tensile strength

12 MPa

Shore hardness

70A

Watertight (EN 1928)

60 kPa

Technical data

Hardness (Shore): 70A (ISO 868)
Elongation at break: >950%
Max. tensile strength: 12 MPa (EN ISO 527-1/3)
Tear strength: 48 N/m (EN ISO 34-1)
Watertight at 60 kPa, 6 m water column (EN 1928)
Crack-bridging: class A5 at -10 °C (EN 1062-7)
Water vapour resistance factor: μ = 769 (EN-ISO 7783:2012)
Liquid water permeability: W = 0.009 kg/m²·h^0.5 (EN 1062-3:2018)
Adhesion to concrete: 1.5 MPa (EN 13892-8); 2.5 MPa with Epoxy 100 primer
Service temperature: stable from -15 °C to 80 °C
Reaction to fire: Class E (EN 13501-1)

Approvals

CE marking to EN 1504-2 for protection and repair of concrete, certificate 0370-CPR-2247
Root resistance to CEN/TS 14416:2014 (no internal reinforcement)
External fire: Class B_roof(t4) on combustible (non-foam) substrate

04 · Performance

Impermax Cold Polyurea Supreme performance

Hardness is 70A (ISO 868), elongation at break above 950%, maximum tensile strength 12 MPa (EN ISO 527-1/3) and tear strength 48 N/m (EN ISO 34-1).

The membrane is watertight at 60 kPa (a 6 m water column, EN 1928) and reaches crack-bridging class A5 at -10 °C (EN 1062-7). That elongation, plus solvent-free chemistry, is why it is chosen for detailing and for interiors where odour matters.

Application data

Mix ratio: A=100, B=170 by weight; A=100, B=220 by volume
Pot life: 30 min at 20 °C and 50% RH
Coverage: usually 2 kg/m² minimum in one coat on a flat substrate
Air temperature: 5–35 °C, relative humidity below 70%
Curing table: 4 h total at 20 °C / 50% RH; light foot traffic next day; full cure about 5–6 days
Packaging: 7.8 kg component A, 13.2 kg component B

05 · FAQ

Impermax Cold Polyurea Supreme: frequently asked questions

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Every product page in this series is based on its official Krypton Chemical technical datasheet.

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