A radon gas certified, bitumen / rubber waterproofing coating used primarily for the external waterproofing of earth-retaining structures such as basements and foundation walls. It forms a thick, highly flexible barrier to water ingress that can be applied to thicknesses of 8 mm and is able to fill voids, cracks and joints of up to 5 mm.
 
Hydrobond 2K-Flex is solvent-free and environmentally friendly, consisting of a bitumen emulsion and a reactive powder. The chemical reaction of these components, following mixing, effects quick rain-fastness and an accelerated drying process to produce a firm, yet still highly flexible coating. The paste-like, stable consistency enables application of high layer thicknesses, which is especially beneficial for the waterproofing of irregular substrate.

Applied by trowel or by airless spray machine, the coating is highly flexible, crack-bridging and resistant to any aggressive substances occurring in natural soil and is suitable for waterproofing to DIN 18533 W1-E, W2.1-E, W3-E and W4-E. Newton HydroBond 2K-Flex is also a constituent product of the Newton HydroBond®System for Type A Waterproofing to Grades 1a,1b, 2 and 3 - BS 8102:2022.
 
1Nr 30L Tub plus ancillaries achieves a typical coverage rate of 5.6L/m2.
 
HydroBond 2K-Flex requires two ancillary products, HydroBond 2K-Flex Primer and HydroBond 2K-Flex Mesh which are available as purchase options on this page.
 
Key Benefits
 
Thick coating, fully-bonded seamless waterproofing membrane with excellent crack-bridging capabilities.
Particularly easy trowel application due to low material weight.
Fast reaction time due to the special powder catalyst.
Highly flexible with 2 mm crack bridging due to high-quality polystyrene and polymer modification.
Quick-drying and rain-fast after a short period.
Solvent-free, non-toxic and odourless.
Non-flammable – No VOCs.
Radon gas resistance.
Sprayable with suitable equipment.
Adheres insulating panels to concrete, masonry and thoroughly dried thick bituminous coatings.
 
Typical Waterproofing Applications
 
Continuous Type A waterproofing and radon protection of retained structures, together with Newton HydroBond pre-applied membranes.
Type A waterproofing and radon membrane for basement, foundations and earth-retained walls.
Smoothing of irregular surfaces prior to application of bitumen-based membranes.