The Most Advanced Radon Protection for Foundations
Other Practical Advantages During Foundation Work
- Fast, seamless application → no tapes or overlaps required.
- Closed-cell structure → foam seals perfectly around pipes, cables, etc.
- Compressive strength → withstands slab and backfill loads (200 kPa).
- Insulating capacity → λ = 0.026 W/mK; U-value = 0.13 with 200 mm thickness.
- Time savings → radon protection and insulation in a single application.
- Covers complex geometries without cutting → angles and irregularities handled with ease.
Documented Protection
S35-Z polyurethane has been tested by an independent laboratory at the University of Cantabria, showing a radon diffusion coefficient of < 1.0 × 10⁻¹³ m²/s, which corresponds to:
- 5 times more airtight than radon barrier membranes on the market (0.1 mBq/s with 50,000 Bq in the soil).
- 20 times more airtight than standard products (0.4 mBq/s with 50,000 Bq in the soil).
- Poliuretan Spray S35-Z: 0.02 mBq/s with 50,000 Bq in the soil.
Even with just 25 mm thickness, extremely low radon ingress is achieved.
An Alternative with Environmental Attributes
-
Contains recycled content (PET).
-
Uses renewable raw materials.
-
Polyol developed with blowing agents with very low Global Warming Potential (GWP).
-
Less waste and transport: the material expands 20–30 times its liquid volume, reducing packaging and transportation.
-
Solves multiple problems in a single application.
-
- Addresses moisture, radon, insulation, and airtightness with one product and one step.
- Fewer work stages, shorter construction time, and reduced resource use.
