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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
Recommended