Newton DampSafe 809-HP High-Performance Damp-Proof Course (DPC)
The Newton DampSafe 809-HP DPC is a high-performance polymeric damp-proof course that provides an extremely tough, radon-rated barrier against moisture ingress. Designed to withstand high compressive loads without extrusion, this durable DPC is suitable for horizontal, vertical, and stepped applications, including cavity trays and solid masonry walls.
Key Benefits
✔ Highly durable & tough – Will not deform or extrude under compressive loads.
✔ Superior moisture protection – Effective barrier against water & water vapour.
✔ Flexible & resistant to shrinkage – Performs in low temperatures without cracking.
✔ Strong adhesion – Bond strength is greater than the bond between mortar and brick.
✔ Versatile use – Compatible with Newton waterproofing & damp-proofing systems.
Typical Applications
🔹 Horizontal, vertical, and stepped damp-proof courses
🔹 Cavity trays in cavity and solid masonry walls
🔹 Integration with Newtonite Damp Proofing & CDM Waterproofing Systems
🔹 Extension of floor membranes through internal and spine walls
Suitable Substrates
✅ Brick & Block
✅ Stone
✅ Concrete
✅ High-load insulated wall courses (e.g., Marmox Thermoblock, Foamglas Perinsul)
Product Data
| Code |
Width (mm) |
Roll Length |
Coverage |
| 809-100 |
100mm |
20m |
2m² |
| 809-150 |
150mm |
20m |
3m² |
| 809-115 |
115mm |
20m |
2.3m² |
| 809-300 |
300mm |
20m |
6m² |
| 809-337.5 |
337.5mm |
20m |
6.75m² |
| 809-450 |
450mm |
20m |
9m² |
| 809-600 |
600mm |
20m |
12m² |
| 809-900 |
900mm |
20m |
18m² |
Downloads
Technical Data
| Installed Performance |
Result |
|
Resistance to static load (10 mm steel ball)
|
20kg |
|
Shear resistance of joints – longitudinal
|
100 N/mm2
|
|
Shear resistance of joints – traverse
|
250 N/mm2 |
|
Durability (Alkali, Annex C – 50% elongation)
|
Pass
|
|
Elongation at break – longitudinal
|
810% |
| Elongation at break – traverse |
850%
|
| Resistance to tearing (nail shank) – longitudinal |
170N |
| Resistance to tearing (nail shank) – traverse |
180N
|
| Flexibility at low temperatures |
≤40oC |
| Durability against heat ageing – 60 kPa |
Pass
|
| Radon permeability |
18 x 10(-12) m/s |
| Radon transmittance |
21 x 10(-12) m/s |
| CO2 permeability |
1.59 x 10(-12) m2/s/Pa |
| Water vapour diffusion resistance – Sd value |
350m |
| Reaction to fire (Euroclass) |
E |
