High Grade Hydrophilic Water Bar
Newton 303 PolyProof is a hydrophilic, thermo-plastic 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. The swelling is achieved through special hydrophilic polymers, which are inseparably linked within the carrier material (TPE). This ensures that high elasticity and exceptional tensile strength results even when fully expanded within the joint.
Due to its high resistance to acids, alkalis and organic solutions, Newton 303 PolyProof can be used to seal joints where aggressive water is expected such as within sewage treatment plants, bio-gas plants and liquid waste holding tanks. Newton 303 PolyProof is particularly suited to sealing expansion joints, compression joints and settlement joints. Newton 303 PloyProof swells to 400 times its original size when in contact with water, sealing the joint fully and reliably.
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
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 400 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.
Suitable Substrate
Construction joints within retained concrete structures:
- Static and non-static construction joints.
- Compression joints.
- Settlement joints.
- Movement joints.
- Pipes, service sleeves, concrete rings, preformed sumps or other protrusions through a poured concrete element.
System 300 – Waterproofing of Concrete Structures- View Full Product Range
View Newton Waterproofing Systems Catalogue
For a hard copy of this catalogue please e-mail your details
to info@newton-membranes.co.uk
Further Information
For further information or to place an order, please ring 020 7237 1217 or e-mail info@newton-membranes.co.uk. For a list of registered installers in your area, fill out our online form Request List of Registered Installers


