HydroBond 402
Newton HydroBond 402 is a high-performance sheet membrane for the external waterproofing of below-ground foundation structures, basements, water holding tanks, culverts and tunnel bases.
A composite of LDPE and a high quality non-woven geotextile fleece, the membrane is very flexible, giving it excellent crack-bridging capability over construction joints and cracks within the concrete. When pre-applied before placement, the wet concrete is absorbed into the geotextile fleece, integrally bonding the membrane to the concrete. This results in a high strength bond with exceptional peel adhesion qualities, and so prevents migration of water between the concrete and the membrane, even if the membrane is damaged.
HydroBond 402 can provide a complete waterproof envelope to the structure to achieve Type A (barrier) waterproofing suitable for Grades 1a, 1b, 2 and 3 as defined by BS 8102:2022, and is suitable for all below-ground and earth-retained structures from domestic basements to the largest civil engineering projects.
Where the formwork is removed to the outer face of the walls, a range of post-applied membranes are available, which overlap onto the HydroBond 402 at the raft edge, to fully encapsulate the structure.
HydroBond 402 can be used alongside other Newton products to provide a coordinated and combined approach to the waterproofing of the whole structure that includes protection against water penetrating through construction joints, through and around service entries and to movement joints. Correctly protected, the HydroBond System will provide, under normal service conditions, a durable waterproof barrier for the life of the building to which it is installed.
