Newton Hydrobond 401 SA – Self-Adhesive Type A Waterproofing Membrane - 20m2
Newton Hydrobond 401 SA is a high-performance, self-adhesive waterproofing membrane designed for the external waterproofing of below-ground structures such as basements, water holding tanks, culverts and earth-retained walls. As a Type A (barrier) membrane, it provides a durable sheet waterproofing solution when post-applied to concrete, blockwork or Insulated Concrete Formwork (ICF) walls.
Supplied with a specially formulated bitumen primer (as a purchase option) to improve surface adhesion.
Formed from a composite of cross-oriented high-density polyethylene (HDPE) and a bitumen polymer adhesive, Hydrobond 401 SA is flexible, tough and impact-resistant, offering excellent crack-bridging capability, strong peel adhesion and resistance to ground water chemicals. It bonds reliably even at temperatures as low as 5 °C, making it suitable for UK climates and extended site conditions.
The system can be used in conjunction with Newton Hydrobond pre-applied membranes (such as Hydrobond 402 or Hydrobond 403).
Key Benefits
Self-adhesive Type A waterproofing membrane
Excellent peel adhesion to substrate at temperatures from 5 °C and above
High flexibility and crack-bridging resistance
Durable and dimensionally stable
Resistant to aggressive ground water chemicals
Quick and simple to install — no jointing tapes required*
Suitable for post-applied below-ground waterproofing applications
Typical Applications
Post-applied waterproofing to basement & retaining walls
Below-ground earth-retained structures
Water holding tanks, culverts and mass concrete walls
Integration with pre-applied membranes as part of a complete HydroBond waterproofing system
Technical Data
| Property | Value |
|---|---|
| Product Type | Self-adhesive, post-applied waterproofing membrane |
| Classification | Type A (barrier) waterproofing membrane |
| Material | Cross-oriented HDPE with bitumen polymer adhesive |
| Roll Width | 1.05 m |
| Roll Length | 19.05 m (≈20 m²) |
| Use | External post-applied waterproofing |
| Peel Adhesion | High strength bond, even at ≥5 °C |
| Flexibility | Excellent; crack-bridging and impact-resistant |
| Resistance | Aggressive ground water chemicals |
| Compatible Standards | BS 8102:2022 Type A waterproofing |
FAQ's
What is HydroBond SA waterproofing membrane used for?
HydroBond SA is a self-adhesive membrane for post-applied waterproofing of below-ground structures, such as basements and water-retaining concrete walls.
How does HydroBond SA bond to substrate?
It uses a bitumen polymer adhesive that creates a high peel strength bond to concrete, blockwork or ICF walls when correctly prepared.
Can HydroBond SA be installed in cold conditions?
Yes — it achieves high-strength bonding at temperatures as low as 5 °C, helping in varied UK site conditions.
Is this membrane flexible?
Yes — the membrane is flexible, durable and exhibits excellent crack-bridging performance and resistance to impact or settlement.
What structures is HydroBond SA suitable for?
It is suitable for basements, water holding tanks, culverts, and any post-applied below-ground waterproofing where a barrier membrane is needed.