HydroBond 403 Plus is an extremely high-performance composite sheet waterproofing membrane featuring a locking fleece to one side and a polymer hydrophilic coating to the other. When situated under the new raft or against the wall shuttering the poured concrete engages into the locking fleece so that the membrane is completely locked in and monolithic to the concrete, thereby ensuring that if a leak did occur it cannot track to the construction joints.

The hydrophilic coating seals small holes that may be accidentally formed during the fixing of the reinforcing steel or the pouring or compaction of the concrete.

HydroBond 403 Plus is supplied in rolls of 2 x 30m and can be laid to the blinding and shuttering of a raft construction, or adhered to an already formed retaining wall.

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 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 substrates

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 403 HydroBond Plus:

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

Technical data

Installed Performance

Results

Service temperature

-40ºC to +100ºC

Adhesion to concrete

0.4 N/mm²

Elongation at break (Machine)

20%

Elongation at break (Traverse)

50%

Tensile strength (Machine)

>250 N/50mm

Tensile strength (Traverse)

>200 N/50mm

Resistance to static loading – 20 kg load

Watertight

Resistance to impact – AI plate – 200 mm drop

Watertight

Resistance to impact – EPS panel – 500 mm drop

Watertight

Joint strength – Glued seam

>100 N/50mm

Resistance to tearing – Nail shank – MD**

>150 N

Resistance to tearing – Nail shank – Across

>150 N

Resistance to fire

Euroclass E

Water vapour diffusion resistance – Sd value

68m

A gas variant is also available, HydroBond 403 Plus GB.