The information contained in this technical data sheet is based on the results of our research and on our practical experience in the field. All given test data are average values which have been obtained under defined conditions. The proper and thereby effective and successful application of our products is not subject to our control. The installer is responsible for the correct application under consideration of the specific conditions of the construction site and for the final results of the construction process. This may require adjustments to the recommendations given here for standard cases. Specifications made by our employees or representatives which exceed the specifications contained in this technical guideline require written confirmation. The valid standards for testing and installation, technical guidelines, and acknowledged rules of technology have to be adhered to at all times. The warranty can and is therefore only applied to the quality of our products within the scope of our terms and conditions, not however, for their effective and successful application. This guideline has been technically revised; all previous versions are invalid.

KÖSTER BAUCHEMIE AG Dieselstr. 1 - 10 D - 26607 Aurich Germany

Tel. + 49 4941 9709 0 Fax + 49 4941 9709 40 info@koster.eu www.koster.eu

KÖSTER Technical guideline / Article number 6.085 Issued: December 10, 2012

PUR-Bitumen

Highly resistant crack bridging brush-, roll-, and sprayable elastic 2 component polyurethane sealant

Features

KÖSTER PUR-Bitumen is used as a crack bridging final layer in

highly chemically and mechanically resistant waterproofing and

corrosion protection applications.

Elastic, brush-, roll-, and sprayable polyurethane sealant for

waterproofing horizontal and vertical areas. KÖSTER PUR-

Bitumen is elastic and flexible when cured, waterproof and

resistant to high mechanical stresses and highly resistant to

chemical stresses such as seawater, salt solutions, inorganic and

organic acids and bases.

Technical Data

Color black

Mixing ratio (by weight) 2.5 : 1 (A : B)

Pot life at + 20 °C, 50 % RH approx. 30 minutes

Curing time + 20 °C, 50 % RH approx. 24 h.

Consistency fluid, self leveling, brushable

Density approx. 1 g / cm³

Dew point temp. difference minimum + 3 °C

Application Temperature + 5 °C to + 40 °C

Crack bridging up to

Resistance to pressurized water to

approx. 0.4 mm

approx. 5 bar

Fields of application

KÖSTER PUR-Bitumen is always used as a system in conjunction

with KÖSTER Bridge Coat (on concrete) or KÖSTER Corrosion

Protection (on steel).

KÖSTER PUR-Bitumen is a permanently elastic protective coating

for use where high corrosion resistance and crack bridging

properties are required.

In the KÖSTER Corrosion Protection System it is used as a crack

bridging final layer after proper substrate preparation.

Substrate preparation

Substrate preparation on steel: KÖSTER Corrosion Protection

applied according to the Technical Guidelines.

Substrate preparation on concrete: KÖSTER Bridge Coat applied

according to the Technical Guidelines.

Mixing

Both A and B components must be brought to a temperature of

approximately + 15 °C before application. The A component must

be pre-mixed. The A and B components are mixed thoroughly at

least 3 min. with a mechanical stirring device (below 400 rpm) until

a homogeneous consistency is achieved.

Application

The substrate must be dry, free of loose particles, as well as free

of oil and grease or any other bond inhibiting substances.

KÖSTER PUR-Bitumen is applied in one or two layers.

Consumption

2 x 0.2 – 0.25 kg / m²

Maximum consumption 0.5 kg / m²

Cleaning of tools

Clean tools immediately after use with KÖSTER Universal

Cleaner.

Packaging

5.6 kg combi-package

14 kg combi-package

Storage

Store the material in a dry environment between + 5 °C and + 25

°C. In originally sealed containers it can be stored for 6 months.

Safety

Wear gloves and goggles while processing KÖSTER PUR-

Bitumen.

Technical guidelines cited

KÖSTER Bridge Coat Art.-Nr. 6.084

KÖSTER Corrosion Protection Art. Nr. 6.083

KÖSTER Universal Cleaner Art. Nr. 9.010

KÖSTER Dew Point Table