- reinforcement: polyester felt
- flexibility at: -10° C
- flow resistance: 120° C
- breaking force longitudinal / transverse: >550 N / >400 N
- elongation at break: >30 %
For protection of bituminous membranes with granules (membranes marked reflex), natural slate is used, whose colour tone can differ slightly between different production batches. This has no influence on the functionality of the product.