Two common terms in professional waterproofing projects are APP and SBS modified bituminous membranes. Both are bitumen-based systems, but their performance characteristics can suit different project conditions.
APP refers to bituminous membranes modified with Atactic Polypropylene. This modification can improve behaviour at high temperatures, making APP products suitable for certain warm-climate and high-surface-temperature applications.
SBS refers to Styrene Butadiene Styrene modified membranes. SBS modification can provide advantages in flexibility and low-temperature behaviour.
APP products are generally associated with high-temperature performance, while SBS products may offer greater flexibility and low-temperature performance. However, carrier type, thickness, finish, mechanical properties and standards are also important.
Climate, building type, application surface, temperature variation, mechanical stress, technical specification and installation method should all be evaluated together.
İzopak offers bituminous membrane options for different climate and application conditions, helping project teams select suitable systems.
The right choice between APP and SBS should be based on complete project requirements rather than a single performance criterion.
