NBS Source
Newton 302 Injection Hose


Installed within and used for sealing construction joints in earth-retaining and water-retaining concrete structures.

Suitable substrates:

  • Reinforced concrete;
  • Steel piled walls (welded flange required);
  • Brick or concrete block walls.


A high performance waterbar system featuring micro-ports equally spaced over the entire circumference of the hose, and when injected with injection resin at 1-bar of pressure or above the microscopic ports open and the low-viscosity resin penetrates deeply into the concrete surrounding the construction joint.

The injection hose is compatible with both polyurethane and acrylic injection resins, and when installed and injected correctly Newton 302 Injection Hose improves the watertightness of the ‘Type B’ waterproof structure by sealing the joints and encouraging improvements in the quality of the concrete placement.

Features and benefits:

  • Resistant to permanent water pressure of 2 bar.
  • Can be used with both polyurethane and acrylic resins, such as Newton 322-SP and Newton 323-SA.
  • Hose is not displaced or damaged by the concrete compaction process.
  • No kicker or rebate required, reducing site labour costs.
  • The injection hose is unaffected by weather exposure and site works resulting from project delays.
  • Guaranteed continual flow of the injection material due to the star-shaped interior geometry, even if the hose follows sharp bends.
  • Quicker to install than conventional waterbars.
  • Seals the whole of the joint, not just the few millimetres around the joint and so prevents the water entering the joint and reaching the reinforcement steel.
  • Resistant to sewage, chlorine and sulphides.
  • Integrity is maintained throughout the building life and is not affected by continuous wet/dry cycles.
  • Can be used with or without a kicker.
  • Will not ‘free-swell’ into voids and be washed away as is the case with bentonite based waterbars.

General information


Light blue


Light blue plastic hose with micro-ports equally spaced over the entire circumference


Formulated, closed-cell plastic


Round profile with four semi-circular notches


Supplied in 120 m coils. Installed in lengths of 10-12 m. External diameter of 13 mm


Undamaged Newton 302 Injection Hose, and the resin injected into the system, if specified and installed in accordance with the product data sheets, and only to those substrates confirmed within, have a service life that can be equal to the design life of the structure

Uniclass 2015

Pr_35_90_15_42 Injectable hose waterstopsPrimary


E40/310 Flexible waterstops

Product range

Waterbars, Waterstops and Waterplugs

Specification data - Injectable hose waterstops Enhanced data

Injection material

Injection resin.

Product Reference

302 Injection Hose

Micro-port opening pressure

>1 bar.

Application temperature

-10°C to +50°C.

Service temperature

-10°C to +50°C.

Minimum required concrete cover

100 mm.

Water resistance when sealed with Newton 322-SP

2 bar.