DESMOFLEX® Polyurethane

DESMOFLEX POLYURETHANE is a polyurethane based, white, glossy one component membrane used for long term water-proofing. Due to its polyurethane formulation, provides solutions to problems of waterproofing where the rest methods fail, like to surfaces with stagnant waters and ices. The product is based on pure elastomeric hydrophobic polyurethane resins, which result in excellent mechanical, chemical, thermal, UV and natural element resistance properties. DESMOFLEX POLYURETHANE polymerizes with the underground moisture and air humidity.
The product is suitable for the coating and protection of concrete surfaces, according to EN 1504-2:2004 standard.

• Waterproofing of roofs and terraces
• Waterproofing of balconies and verandas
• Under-tile waterproofing in balconies, bathrooms, kitchens etc
• Protection of polyurethane foam insulation
• Waterproofing of flowerbeds and planter boxes
• Protection of asphalt cloths, old bituminous membranes, EPDM and PVC membranes and old acrylic coatings.
• Waterproofing and protection of concrete constructions bridge-decks, tunnels, foundations, etc.

• Simple application (one component, ready for use)
• During the application polymerizes and creates a seamless elastic hydrophobic membrane without joints
• Does not hydrolyzes and can be applied to places with stagnant waters
• Resistant to microorganisms
• Crack-bridging up to 2mm, even at -10oC
• Allows the substrate to breathe
• Provides excellent adhesion to the whole surface
• Resistant to detergents, oils, seawater and domestic chemicals
• Does not soften in the summer and does not harden in the winter, as it maintains its mechanical properties over a temperature span of -30°C to +80°C
• The surface remains passable
• In case of mechanical damage to the membrane, it can be easily repaired in a few minutes
• Resistant to root penetration
• Provides resistance to frost
• Reflect sunlight and provides very good thermos-insulation
• Provides excellent resistance against sunlight exposure and UV radiation
• Over 15 years of possible repaint

• CAUTION: Do not clean the surface with water. The careful sealing of existing cracks and joints is extremely important for long lasting waterproofing results.
• Repair of cracks: Clean the cracks from dust, residues or other contamination. Prime locally with the primer DESMOFLEX EPOXY PRIMER and allow 2-3 hours to dry. Fill the cracks with the sealant ELASTO PU. Then, apply locally adequate waterproofing material DESMOFLEX POLY-URETHANE, and while wet, cover with a suitable cut stripe of THRAKON FABRIC of 60 g/m2, centered over the crack. Press the stripe with a metallic roll in the liquid in order to impregnate it. Then, apply enough waterproofing material DESMOFLEX POLYURETHANE, until complete saturation is achieved.
• Repair of joints: Clean expansion joints and control joints of dust, residue or other contamination. If the joint is too small, use cutting machine in order to widen it to the prescribed size. The prepared movement joint should have a depth of 10-20 mm. The width-depth ratio of the movement joint should be 2:1. With a brush, apply waterproofing material DESMOFLEX POLYURETHANE, centered over and inside the joint. Place a stripe of polyester geofabric over the wet material and with a suitable tool press the stripe deeply in the joint, till its internal surface to be fully covered with the geofabric. Apply over the fabric enough waterproofing material DESMOFLEX POLYURETHANE, till repletion. Then, place in the joint a suitable polyurethane cord and fill in the remaining free space of the joint with the sealant ELASTO PU. Allow it to cure for 12 to 18 hours.
• Priming: Prime absorbent and non-absorbent surfaces like concrete (also prime fresh concrete), cement screed or wood metal, bituminous membranes, ceramic tiles and old acrylic coatings with the DESMOFLEX EPOXY PRIMER.
• Application of waterproofing membrane: After approx. 6-12 hours (not later than 24 hours) and while the DESMOFLEX EPOXY PRIMER is still a bit tacky, apply the polyurethane coating DESMOFLEX POLYURETHANE. Pour enough of DESMOFLEX PU onto the prepared and primed surface and apply by roller or brush. Continue likewise until the surface is fully covered. After 12 hours (not later than 48 hours), apply another layer of DESMOFLEX PU. For extended surfaces, the application of a third layer is recommended.

Containers must be stored in dry and cool places for a maximum of 9 months after the date of production. Protect the containers from moisture and sunlight. Storage temperature: 5 – 350C. The product must remain in unopened containers, bearing the name of the producer, the product description, the production number and the precautionary label.