Liquid roofing material (Impermax B1K)

Liquid roofing material (Impermax B1K)
Usage Impermax B1K
Liquid roofing material (Impermax B1K)
Usage Impermax B1K
  • 1-component roofing material
  • Easy to use
  • Colour: black

Impermax B1K is a high performance liquid applied roofing system. It consists of a 1-component polyurethane bitumen with solvents which creates a seamless waterproof membrane.

This liquid roofing material adheres completely to the surface, so you do not need to nail, burn or glue the material. In addition, in case of leakage, no water can pass under the membrane, making it easy to locate and repair leaks. Impermax liquid roofing is easy to process and is dry within 4 hours.

This product is suitable for new construction, repair and renovation.

Benefits of Impermax B1K

  • Easy to process with roller and brush.
  • The material adheres completely to the surface. The roofing therefore does not need to be nailed, burned or glued.
  • Leaks or damages are easy to locate and repair.
  • Easy to create and work on difficult details and shapes such as sloping edges, roof penetrations and skylights.
  • Minimal fire risk because you are not working with open flames.
  • Becomes waterproof quickly, almost immediately rainproof.


This product is mainly used for waterproofing and air-sealing outdoor constructions with little or no foot traffic. Examples are:

  • Balconies, terraces.
  • Flooring with light pedestrian traffic.
  • Basement.
  • Asphalt, EPDM and PVS trim. 
  • Roof.
  • Flashing (details of waterproofing project with bituminous membrane)

Instructions for use

This liquid roofing material is ready to use straight from the bucket. You can mix the material with a spiral mixer on a drilling machine (this is not possible by hand). Dilution is not necessary. The liquid roofing material is suitable for use as a 1 or 2 layer system:

1-layer system
Impermax B1K is suitable for use as 1-layer system over existing roofing membranes such as bitumen, EPDM, PVC and asphalt (consumption: 1,6kg/m2).

2-layer system
The liquid roofing membrane is, in combination with polyester fleece, also suitable as complete roofing system (consumption: 2.5kg/m2).

Product properties

Contents: 6 kg, 20 kg
Colour: black
VOC content: 70%
VOC content: 330 g/l
Viscosity: 5400 mPa.s (25°C)
Processing time: 8-12 hours
Curing time: 1-4 hours
Processing temperature: 0-30°C
Hardness: Shore 35A
Maximum elongation: 400%

We have a number of recommendations for working safely with polymers. At Polyestershoppen you will not only find the polymers themselves, but you can also purchase all the protective equipment you need from us. If you have any doubts or questions, please contact our customer service. We can give you advice on how to work safely with polymers.

Safety equipment


Code Description
H226 Flammable liquid and vapour.
H315 Causes skin irritation.
H317 May cause an allergic skin reaction.
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled.
P101 If medical advice is needed, have product container or label at hand.
P102 Keep out of reach of children.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352 IF ON SKIN: Wash with plenty of water/…
P333+P313 If skin irritation or rash occurs: Get medical advice/attention.
P403+P235 Store in a well-ventilated place. Keep cool.
P501B Dispose of contents/container in accordance with in accordance with local regulation
MDI As from 24 August 2023 adequate training is required before industrial or professional use

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Volume related prices

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5 Pieces € 63,37 € 8,10
10 Pieces € 61,74 € 32,50
15 Pieces € 60,12 € 73,05