Newton HydroBond 403 is a high performance, self-healing composite sheet membrane with a radon barrier. Available in two variants, HydroBond 403 GB adds ground gas resistance (in compliance with BS 8485:2015) as well as the exceptional waterproofing capabilities of the standard membrane.

When fitted above the raft support or to wall formwork, the membrane locking fleece is fully encapsulated into the newly placed concrete, becoming fully-engaged to prevent water tracking. If the waterproof LDPE layer is punctured, the exposed hydrophilic coating expands, preventing water ingress, effectively sealing small holes that may be accidentally formed during fixing of the reinforcing steel or the placing and compaction of the concrete.

Newton HydroBond 403 provides a complete waterproof envelope to the structure to achieve Type A (barrier) waterproofing suitable for Grades 1, 2 and 3 as defined by BS 8102:2009, and is suitable for all below ground and earth-retained structures from domestic basements to the largest civil engineering projects.

Both variants can be used as part of the HydroBond® System in conjunction with Newton HydroBond 108, which is sprayed to the exposed walls of the basement after the temporary formwork is removed. Where space is tight, Newton HydroBond 109 can be applied by roller or brush or small airless spray machine.

Newton HydroBond 403 can be used alongside other Newton products to provide a co-ordinated and combined approach to the waterproofing of the whole structure that includes protection against water ingress to the deck, through construction joints, through and around service entries and to movement joints.

Correctly protected, the Newton HydroBond System will provide, under normal service conditions, a durable waterproof barrier for the life of the building to which it is installed; the expected lifetime of the building itself should be at least 60 years. The Newton HydroBond system is supported by BDA Agrément Certificate BAB 17-031/04/A and is accepted by the NHBC as a suitable waterproofing system for Type A Waterproofing to Grades 1, 2 & 3 according to BS 8102:2009.

KEY BENEFITS

• Agrément certificated and NHBC accepted waterproofing system • Full mechanical bond to concrete prevents water migration between membrane and structure

• Hydrophilic layer provides self-healing of punctures to the membrane

• Very flexible - Resistant to movement and fissures in substrates

• The HydroBond System completely encapsulates the structure

• Excellent resistance to the high alkalinity of concrete

• Third-party test certification for radon, carbon dioxide and hydrocarbon gases

TYPICAL APPLICATIONS

As a continuous membrane to permanent raft and wall formwork such as the raft blinding and piled walls of reinforced concrete earth-retained structures.

SUITABLE SUBSTRATE

RAFT OR SLAB

• Concrete blinding

• Compacted type 1 hardcore

• Compacted sand

The following can be placed above the blinding or hardcore prior to the installation of HydroBond 403:

• Void former

• Clay heave board

• Closed-cell flooring grade insulation

• Newton 410 GeoDrain

WALL FORMWORK

• Existing structure

• Secant or contiguous concrete piles

• Metal sheet piles

• Diaphragm walls

• King post wall

• Sufficiently stable ground such as clay or chalk

• Temporary timber shuttering/formwork