Two-component, polyurethane-bituminous, liquid waterproofing membrane. ISOFLEX-PU 560 BT consists of hydrophobic polyurethane resins (component A) and bitumen (component B). The membrane formed is watertight, shows high elasticity and excellent mechanical strength and chemical resistance. It offers the following advantages:

• Continuous, elastic and waterproof membrane, without seams or joints.
• Excellent adhesion to various substrates, such as concrete, cement screeds, wood, bituminous coating, steel surfaces.
• Applicability even to irregular substrates and in thick layers.
• Easy mixing (1:1 by volume).
• Quick-drying time.
• Crack-bridging properties.
• Joint-sealing solution.

Certified according to EN 1504-2 and classified as a coating for surface protection of concrete. CE marked. Certificate No. 2032-CPR-10.11. ISOFLEX-PU 560 BT has been successfully tested by a third-party laboratory for resistance to root penetration, according to CEN/TS 14416:2014. ISOFLEX-PU 560 BT is suitable for waterproofing:

• Underground constructions, e.g. foundations.
• Green roofs.
• Non-potable water tanks.
• Irrigation channels.
• Under tiles in kitchens, bathrooms, balconies, roofs and terraces as long as quartz sand has been previously broadcast on its last layer.
• Under thermal insulation boards on flat roofs.
• In construction works, highways, tunnels, bridge decks, etc.

Substrate preparation
In general, the substrate must be dry (moisture content <4%) and free of grease, loose particles, dust, etc. Substrate temperature during application should be between +5oC and +35oC.

Application-Consumption
Components A (polyurethane resin) and B (bitumen) are packaged in different containers. Mix equal quantities of the two components into a clean container. The two components are mixed for about 3 minutes with a low-speed mixer (300 rpm). It is important to stir the mixture thoroughly near the walls and bottom of the container.

a) Full-surface waterproofing
ISOFLEX-PU 560 BT is applied with a brush, roller or trowel 2-3 hours after priming and while PRIMER-PU 100 is still tacky. Consumption: 1.2-2.0 l/m2 in 2-3 layers, depending on the substrate.

b) Under-tile waterproofing
Following the application of ISOFLEX-PU 560 BT and while is still fresh, quartz sand must be broadcast on the surface. The quartz sand must be completely dry. Consumption of quartz sand: approx. 3 kg/m2. After 24 hours, any loose grains should be removed with a high-suction vacuum cleaner. When installing ceramic tiles, it is recommended to use high-performance polymer-modified tile adhesives such as ISOMAT AK-22, ISOMAT AK-23 XXL, ISOMAT AK-25, ISOMAT AK-ELASTIC and ISOMAT AK-MEGARAPID.