NBS Source
Newton 315 Polymer Waterbar


Suitable for use 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. This results in high elasticity and exceptional tensile strength, even when fully expanded within the joint.

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 mm and 10 mm profile 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.

Suitable joints:

  • Construction joints, day joints and shrinkage joints.
  • Concrete walls above a concrete kicker.
  • 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.

To concrete and mortar, the application can be enhanced by the use of masonry nails at approximately 250 mm centres.

General information




White matt finish


TPE with hydrophilic polymers


Varies due to nature of product - can swell up to nine times its original size


Three sizes available: 20 mm x 10 mm x 10 m coil - Code 315-10, 20 mm x 5 mm x 20 m coil - Code 315-5, 20 mm x 2 mm x 20 m coil - Code 315-2.



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_65_52_61_64 Pipe sleeve sealsPrimary


D40/565 Proprietary waterstops

E40/320 Hydrophilic waterstops

Product range

Waterbars, Waterstops and Waterplugs

Specification data - Pipe sleeve seals Enhanced data

Product Reference

Newton 315 Polymer Waterbar

Cross Section

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).

Density / Specific gravity



10 and 20 m.

Shelf life

24 months.


Shore A.

Melting point


Application temperature


Service temperature

-30°C to +60°C.

Minimum required concrete cover

80 and 50 mm.

VOC content


Initial delay of swelling

7 days.

Full swell achieved

28 days.

Increase in mass (Neutral water - 7 pH)


Increase in mass (High alkaline water - 12.5pH)


Increase in mass (Aggressive water - DIN 4030)


Max swelling pressure (confined within joint)

2.8 N/mm².

Water resistance (tested)

5.0 bar.

Working water resistance (safety factor of 2.5)

2.0 bar.

Reaction to fire classification

B2 Euroclass.

Digital objects

Platform Compatible Version Certified to




Revit 2016


Download now from NBS National BIM Library


Newton 315 Polymer Waterbar

Newton 315 Polymer Waterbar

Third party certifications

QA Certificate

QA Certificate

Kiwa BCAC: Certificate BCAC-17-002

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