Waterproofing Systems / System 300 / Newton 303 PolyProof


Newton 303 PolyProof 

High Grade Hydrophilic Waterbar

Newton 303 PolyProof is a hydrophilic, thermoplastic elastomer water bar, which swells when activated by moisture. It is characterised by high elasticity and high tensile strength. Newton 303 PolyProof can be used to seal the structure against water leaks to both poured concrete and precast construction joints.

  • Key Benefits

    Very high resistance to water pressure

    Delayed swelling – will not swell during the installation process or during the concrete cure

    Swells up to 4 times its original size to quickly seal leaks at joints in the structure

    Very resistant to the high alkalinity of concrete

    Maintains very high elasticity and tensile strength, even when swollen

    Age resistant, no embrittlement

    Resistant to sewage, chlorine and sulphur

    Suitable for both ‘new to new’ joints and ‘new to old’ joints

    Retains integrity even through many wet/dry cycles

    Typical Applications

    Primary swelling water bar to seal the joint against leaks through construction joints, movement joints and compression joints to earth retained structures.

    The following joints can be waterproofed with Newton 303 PolyProof:

    Raft – Raft

    Raft – Wall

    Wall – Wall

    Slab – Steel Piled Cut off Wall

    Wall – Deck

    Slab – Slab

    Slab – Wall

    Protrusions through the structure

  • Speak to the Experts

    For further information about structural waterproofing speak to one of our technical experts:

    Call us:  01732 360 095
    Email us: tech@newtonwaterproofing.co.uk


    PDF Downloads

    Data Sheet  

    Product Overview

    Code: SX303
    Size: 20mm x 20mm
    Colour: Blue
    Application Rate: N/A


“I use Newton Waterproofing Systems because of the friendly and efficient service that we get - nothing is ever too much trouble. The products are excellent and I like being part of the research and development of their products to the ongoing benefit of the waterproofing industry. In addition I like the fact that my company is associated with the market leaders in structural waterproofing.” 

Ian MacLennan, MacLennan UK (Newton Specialist Basement Contractor)