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Newton 315 Polymer Waterbar

- 2 mm profile:

Sealing construction joints against water leaks to:

  • Pipes and sleeves.
  • Preformed sump chambers.
  • Steel columns.
  • Manholes.


A hydrophilic acrylate polymer waterbar, which swells when activated by moisture. Offering high elasticity and high tensile strength, Newton 315 Polymer-Waterbar can be used to seal the structure against water leaks to both cast-in-place concrete and precast construction joints.

The swelling is achieved through hydrophilic acrylate polymers, which are inseparably embedded within the butylene carrier material.

Due to its high resistance to acids, alkalis and organic solutions, Newton 315 Polymer-Waterbar can be used to seal joints where aggressive water is expected such as within sewage treatment plants, biogas plants and liquid waste holding tanks.

Consult manufacturer for installation recommendations.

Features and benefits:

  • Accepted by the NHBC as a suitable waterbar Type B Waterproofing to Grades 1, 2 and 3 to BS 8102: 2009 (5 and 10 mm variants only).
  • Resistant to permanent water pressure of 2 bar.
  • Delayed swelling – will not swell during the installation process or during the concrete cure.
  • Swells up to nine times its original size.
  • Very resistant to the high alkalinity of concrete.
  • Maintains very high elasticity and tensile strength, even when swollen.
  • Age-resistant, no embrittlement.
  • Resistant to a large range of chemicals (see manufacturer's literature for further details).
  • Retains integrity even through many wet/ dry cycles.
  • Has a service life that can be equal to the design life of the structure.


- 2 mm profile:

Sealing construction joints against water leaks to:

  • Pipes and sleeves.
  • Preformed sump chambers.
  • Steel columns.
  • Manholes.

- 5/ 10 mm profile:

Sealing construction joints against water leaks to:

  • Concrete and steel intensive structures.
  • Sewage and waste water tanks.
  • Reservoirs.
  • Biogas plants.
  • Underpinning.

Suitable substrates:

  • Concrete.
  • Steel.
  • Brick or concrete block.
  • Ceramic.
  • Plastic.

Suitable joints:

Construction joints, day joints and shrinkage joints.

  • Concrete walls above a concrete kicker.
  • Within concrete walls.
  • Within concrete rafts or slabs.
  • Concrete slab to concrete or steel wall.
  • Concrete slab to brick/ block wall (20 x 10 mm only).
  • Joints to precast concrete elements.
  • Steel beams protruding through the concrete.
  • Ceramic or plastic waste pipe protrusions (20 x 2 mm only).
  • Preformed sump chambers within new rafts or slabs (20 x 2 mm only).


Newton 315 Polymer-Waterbar is glued to one side of the construction joint prior to the placement of the next concrete element that forms the joint.

Recommended adhesive:

Newton 309-M – adhesive with very high bond characteristics.

The application can be enhanced by the use of masonry nails at approximately 250 mm centres.

General information

20 x 2 x 20 000 mm (315-2)

20 x 5 x 20 000 mm (315-5)

20 x 10 x 10 000 mm (315-10)




TPE with hydrophilic polymers


Newton 315 polymer waterbar will provide, under normal service conditions, a durable waterproof covering for the life of the building to which it is installed

Uniclass 2015
Pr_35_90_15_74 Rubber hydrophilic waterstopsPrimary

D40/565 Proprietary waterstops

E40/320 Hydrophilic waterstops

Specification data - Rubber hydrophilic waterstops
Product Reference

Newton 315 Polymer Waterbar


20 x 2 x 20 000 mm (315-2)

20 x 5 x 20 000 mm (315-5)

20 x 10 x 10 000 mm (315-10)

Standard product features


Thermoplastic elastomers (TPE) with hydrophilic polymers.



Technical characteristics:

- Features:

  • Density/ Specific gravity: 1.26.
  • Hardness: Shore A 26.
  • Melting point: 110°C.
  • Application temperature: 5–40°C.
  • Service temperature: -30 to +60°C.
  • Minimum required concrete cover: 80 mm (for 20 x 10 mm) and 50 mm (for 20 x 5 mm).
  • VOC content: None.
  • Consumption (290 ml cartridge) 6–8 linear metres.

- Installed performance:

  • Initial delay of swelling: 7 days. Full swell achieved after 28 days.
  • Increase in mass (Neutral water – 7 pH): 900%. (Testing by MFPA).
  • Increase in mass (High alkaline water – 12.5 pH): 350%. (Testing by MFPA).
  • Increase in mass (Aggressive water – DIN 4030): 330%. (Testing by MFPA).
  • Max swelling pressure (confined within joint): 2.8 N/mm². (Testing by MFPA).
  • Water resistance (tested): 5.0 bar. (Testing by MFPA).
  • Working water resistance (safety factor of 2.5): 2.0 bar. (Testing by MFPA).
  • Reaction to fire classification (to DIN 4102-1): Euroclass B2.

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