weberdry PUR B1K

Product formerly named: formerly weberdry 370 BPU

Liquid-applied polyurethane/bitumen waterproofing membrane weberdry PUR B1K is a liquid-applied, highly permanent elastic, cold applied and cold curing, bitumen extended, one component polyurethane membrane used for long lasting waterproofing. Solvent based.
The weberdry PUR B1K is based on pure elastomeric hydrophobic polyurethane resins, and is extended with chemically polymerized virgin bitumen, which results in excellent mechanical, chemical, thermal and natural element resistance properties. Cures by reaction with ground and air moisture.

Surface of application

Wall, Floor, Roof

Available packaging

Lebanon Syria Jordan KSA UAE Qatar Kuwait Oman
6 kg 6 kg 6 kg 6 kg 6 kg 6 kg 6 kg 6 kg
25 kg 25 kg 25 kg 25 kg 25 kg 25 kg 25 kg 25 kg

Documentation and brochures

To know before applying

  • Clean concrete cracks and hairline cracks, of dust, residue or other contamination.
  • Fill all prepared cracks with weber jointseal PU or weber jointseal PU MC sealant.
  • On sound, high quality concrete surfaces no primer is necessary. 
  • Prime very absorbent and brittle concrete or brittle cement screed surfaces with weberdry prime 310 PU  or with weberdry prime EP 2K.
  • Prime non-absorbent surfaces like metal, ceramic tiles and old coatings with weberdry prime EP 2K. 

For more information please refer to the technical data sheet of the product

Features and benefits

  • Easy to apply
  • 1K PU/Bitumen used for long lasting waterproofing membrane
  • Resistant to water and frost
  • Excellent crack-bridging properties
  • Excellent adhesion to almost any type of surface
  • Maintains its mechanical properties over a temperature span of -40oC to +90oC
  • Resistant to domestic chemicals


  • weberdry PUR B1K is slippery when wet on floor . In order to avoid slipperiness, sprinkle suitable aggregates onto the still wet coating to create an anti-slip surface.
  • weberdry PUR B1K should be protected  before backfilling on retaining wall
  • Once open the pail should be used as weberdry PUR B1K cures by reaction with air moisture.

This product fits for these following projects