Newton HydroBond 403 Plus – High-Performance Self-Healing Waterproofing Membrane
Newton HydroBond 403 Plus is a BDA-approved, NHBC-accepted Type A waterproofing membrane featuring a self-healing hydrophilic polymer coating and an inner locking fleece. Designed for below-ground structures, it provides long-term waterproof protection while its gas barrier variant resists radon, carbon dioxide, and hydrocarbons.
This membrane creates a complete waterproof envelope around structures, delivering Type A (barrier) waterproofing suitable for Grades 1, 2, and 3 as defined by BS 8102:2022. It is ideal for applications ranging from domestic basements to large civil engineering projects and integrates seamlessly with Newton HydroBond 108-LM or HydroBond 109-LM for comprehensive protection.
Correctly installed and protected, the Newton HydroBond System provides a durable waterproof barrier for the lifetime of the building (minimum 60 years), as certified by BDA Agrément Certificate BAB 16-031/03/A and accepted by NHBC.
Key Benefits
✔ Self-Healing Membrane – Hydrophilic polymer coating seals small punctures and self-heals.
✔ Superior Bonding – Locks to fresh concrete, preventing lateral water migration.
✔ High Durability – Resistant to extreme temperatures (-40°C to +100°C) and environmental conditions.
✔ Gas Barrier Protection – The HBGB variant resists radon, carbon dioxide, and hydrocarbons.
✔ Versatile Application – Suitable for rafts, slabs, and piled walls in basements, tunnels, and retaining walls.
Typical Applications
🏗 Waterproofing & Gas Protection for:
- Basements & below-ground structures
-
Water-retaining structures (tanks, culverts, tunnels)
- Piled walls, secant piles, and diaphragm walls
- Raft slabs & wall formwork
- Earth-retained structures & concrete blinding
Compatible Substrates
✔ Raft or Slab: Concrete blinding, compacted hardcore, void formers, insulation, HydroBond 410 GeoDrain.
✔ Wall Formwork: Secant/contiguous piles, sheet piles, diaphragm walls, king post walls, stable ground, timber shuttering.
Technical Data
| Performance |
Result |
| Service Temperature |
-40ºC to +100ºC |
| Adhesion to Concrete |
0.4 N/mm² |
| Elongation at Break |
20% (Machine) / 50% (Traverse) |
| Tensile Strength |
>250 N/50 mm (Machine) / >200 N/50 mm (Traverse) |
| Resistance to Static Loading |
Watertight at 20 kg load |
| Resistance to Impact |
Watertight (500mm EPS drop test) |
| Joint Strength (Glued Seam) |
>100 N/50 mm |
| Nail Shank Resistance |
>150 N (MD & Across) |
| Fire Resistance |
Euroclass E |
| Water Vapour Diffusion (Sd Value) |
68m |
Product Data
📦 Code: HB / HBGB
📏 Size: 20m x 1.0m (HB) / 20m x 1.5m (HBGB)
🎨 Colour: White & Dark Blue (HB) / White & Light Blue (HBGB)
📐 Coverage: 20m² / 30m²
🔗 For expert guidance, call our technical team at 01268 472358.
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