ULTRAFLEX grey mineral
SBS-modified bitumen roofing and waterproofing cap sheet membrane
SBS-modified bitumen membrane ULTRAFLEX grey mineral is designed for installation as the top layer in double-layer roofing system on buildings and constructions. Can be used for new construction or repair.
The material withstands temperature fluctuations and high mechanical loads providing a long-term, reliable and effective waterproofing. SBS polymer provides additional flexibility and dynamic resistance.
On the bottom side, the material is covered by a polymer film with special graphic elements, melting of which indicates the proper material heating. On the top side, the material is covered by a coarse-grained slate with special hydrophobic treatment that protects the material from damage by ultraviolet radiation during the whole service life of the membrane.

Product technical data
| PROPERTIES |
ULTRAFLEX A 3 mm grey mineral |
ULTRAFLEX A 4 mm grey mineral |
|---|---|---|
| Thickness, mm | ||
| Thickness, mm | 3.0±0.20 | 4.0±0.20 |
| Mass per unit area, kg/m2 | ||
| Mass per unit area, kg/m2 | 3.8±0.38 | 5.1±0.48 |
| Length x width, m | ||
| Length x width, m | 10 x 1 | 10 x 1 |
| Softening point, °C | ||
| Softening point, °C | ≥110 | ≥110 |
| Flexibility at low temperature, °C | ||
| Flexibility at low temperature, °C | ≤-10 | ≤-10 |
| Flow resistance at elevated temperature, °C | ||
| Flow resistance at elevated temperature, °C | ≥100 | ≥100 |
| Elongation L / T, % | ||
| Elongation L / T, % | 45±9 / 50±10 | 45±9 / 50±10 |
| Tensile strength L / T, N/50 mm | ||
| Tensile strength L / T, N/50 mm | 850±170 / 650±130 | 850±170 / 650±130 |
| Tear resistance L / T, N | ||
| Tear resistance L / T, N | 350±100 / 350±100 | 350±100 / 350±100 |
| Reinforcement type | ||
| Reinforcement type | polyester | polyester |
| Protective covering type on the top | ||
| Protective covering type on the top | coarse-grained slate | coarse-grained slate |
| Protective covering type on the bottom | ||
| Protective covering type on the bottom | polymer film | polymer film |