Python BL


One component, high modulus polyurethane sealant. Used for bonding and sealing in the construction industries, flooring applications and structural bonding in vibrating conditions. Can be used on tiles, concrete, timber, metal and GRP.

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Product Details

High bond strength

Excellent chemical resistance

Stays elastic after curing

Good colour stability

Fast curing

Especially developed for concrete

Technical Specification



Packaging: 310 ml aluminium cartridge.

  • All sealing and bonding applications in the building industry.
  • Structural bondings in vibrating constructions.
  • Sealing of shrinking joints in concrete floors.
Application method

Application method: With manual or pneumatic caulking gun.

Cleaning: Clean with white spirit or Surface Cleaner immediately after use.

Finishing: With a soapy solution.

Repair: With the same material


Substrates: all usual building substrates, metals, polyesters.

Nature: clean, dry, free of dust and grease.

Surface preparation: Apply Python PR on porous substrates. Always use Python PR on natural stone, no primer on non-porous substrates. All smooth surfaces can be treated with surface activator.

No adhesion on glass. There is no adhesion on PE, PP, PTFE (Teflon®) and bituminous substrates. We recommend a preliminary compatibility test.

Shelf Life

12 months in unopened packaging in a cool and dry storage place at temperatures between +5°C and +25°C.

Health and Safety

Take the usual labour hygiene into account. Consult the packaging label for more information.


When painted with oxidative drying paints disturbances in the drying of the paint may occur (we recommend to do a compatibility test before application).

Environmental clauses

Leed regulation:

Python BL conforms to the requirements of LEED. Low –Emitting Materials: Adhesives and Sealants.

SCAQMD rule 1168. Complies with USGBC LEED® 2009 Credit 4.1: LowEmitting Materials – Adhesives & Sealants concerning the VOC-content.


The content of this technical data sheet is the result of tests, monitoring and experience. It is general in nature and does not constitute any liability. It is the responsibility of the user to determine by his own tests whether the product is suitable for the application.

Technical Data

ConsistancyStable paste
Curing systemMoisture curing
Skin formation* (20°C / 65% R.H.)Ca. 15 min
Curing speed * (20°C / 65% R.H.)3 mm/24h
Hardness40 ± 5 Shore A
Density1,30 g/ml
Elastic recovery (ISO 7389)> 80 %
Maximum allowed distortion± 20 %
Temperature resistance -30 °C - 90 °C
Max. tension (DIN 53504)-30 °C - 90 °C
Elasticity modulus 100% (DIN 53504)1,70 N/mm²
Elongation at break (DIN 53504)0,80 N/mm²
Application temperature5 °C - 35 °C


Use the input fields provided below to calculate the amount of bags you would need.

Tiling Area

Thickness of Tile

Total Bags Needed

Product Documentation

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