PUR flexible foam with very good resilience. Special settings are possible and refer to the product information remove. ASTI-TECH 500 is a heavy flexible foam with a density of approx. 500 kg/m³ and a foaming factor of approx. 2.2. Suitable for making Made-to-measure shoe beds and individual upholstery. ASTI-Tech 300 is a medium-weight flexible foam with a density of approx. 300 kg/m³ and a foaming factor of 3.7 for the production of forefoot replacements. soft foam inserts. Made-to-measure shoe beds and individual upholstery. ASTI-Tech 150 is a light flexible foam with a density of 150 kg/m³ and a foaming factor of 7.4. Very suitable for the production of forefoot replacement. soft foam inserts. as well as seat shells and individual upholster. ASTI-Tech 100 as the lightest soft foam in the ASTI-Tech line with a Density of approx. 100 kg/m³ and a density of approx. 11.1. Suitable for soft upholstery and seat shells. As a B component (hardener) for all ASTI-TECH settings, ASTI-TECH-B used.