DESMOFLEX® Polyurethane
New generation liquid-applied polyurethane waterproofing membrane (1Κ)
DESMOFLEX® PU is the second part of the most complete DESMOFLEX® PU system, that was created by the latest research discoveries of THRAKON laboratories, to offer the ultimate and long-lasting waterproofing. DESMOFLEX® PU system produces a highly hydrophobic membrane that protects, seals and provides excellent UV resistance. The exclusive new generation “DESMOFLEX®” technology gives to the surfaces high whiteness, water vapor permeability, excellent thermal resistance and excellent adhesion for years.
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DESMOFLEX® Polyurethane
Description
DESMOFLEX® Polyurethane is a polyurethane based, white, glossy one component used for long term waterproofing. Due to its polyurethane technology, provides solutions to problems of waterproofing where the rest methods fail, like to surfaces with stagnant waters and ices. DESMOFLEX® Polyurethane, is based on pure elastomeric hydrophobic polyurethane resins, which result in excellent mechanical, chemical, thermal, UV and natural element resistance properties. It polymerizes with the moisture of the subsoil and air.
Application Fields
- 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 felts waterproofing of old Bitumen felts, Asphalt felts, EPDM and PVC membrane sand old Acrylic coatings
- Waterproofing and protection of constructions from concrete like bridge-decks, tunnels, bases, etc
Advantages
- 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
- Can leave the substrate to breathe
- Provides excellent adhesion to the whole surface
- Resistant to detergents, oils, seawater and domestic chemicals
- Does not smooth in the summer and does not harden in the winter, as it maintains its mechanical properties over a temperature span of -30oC to +80oC
- The surface remains passable
- In case of mechanical damage to the membrane, it can be easily repaired in a few minutes
- Certified as resistant to root penetration
- Provides resistance to frost
- Provides excellent sun light resistance, by giving better thermo insulation results
- Provides excellent resistance to the sun
- Over 15 years of possible repaint
Application Steps
The careful preparation of the surface is important in order to have excellent result and high durability. The surface has to be clean, dry, without damages and free of any contamination which can affect negatively the adhesion of the membrane. Remove all old, loose coatings and dust. New concrete structures need at least 28 days in order to dry.
Step 2Maximum moisture content should not exceed 5%. Old, loose coatings, dirt, fats, oils, organic substances and dust need to be removed by a grinding machine. Possible surface irregularities need to be smoothened. Any loose surface pieces and grinding dust need to be thoroughly removed.
Step 3BE CAREFUL: Do not clean the surface with water. The careful sealing of existing cracks and joints is extremely important for long lasting waterproofing results.
Step 4Repair of cracks: Clean the cracks from dust, residue 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 fair enough of waterproofing material DESMOFLEX PU, and while wet, cover with a suitable cut stripe of THRAKON fabric of 60g/m2 , width of 20 cm, centered over the crack. Press the stripe with a metallic roll in the liquid in order to be irrigated. Then, saturate enough waterproofing material DESMOFLEX PU, until presented full repletion.
Step 5Repair 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 5-15mm. The width-depth ratio of the movement joint should be 2:1. With a brush, apply waterproofing material DESMOFLEX PU of 20cm width, 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 fair enough waterproofing material DESMOFLEX PU, 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 for 12 to 18 hours in order to be polymerized.
Step 6Priming: Prime absorbent and non-absorbent surfaces like concrete (also prime fresh concrete), cement screed or wood metal, bituminous membranes, ceramiv tiles and old acrylic coatings with the DESMOFLEX EPOXY PRIMER.
Step 7Application 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 PU. Pour enough of DESMOFLEX PU onto the prepared and primed surface and lay out by roller or brush. Continue with the same way till the surface for waterproofing is fully covered.
Step 8After 12 hours (till 48 hours), apply another layer of DESMOFLEX PU. For bigger surfaces, apply a third layer of the product.
Step 9Finishing: For excellent results, cover the whole waterproofed surface with one layer of the elastic protection paint DESMOFLEX TOP COAT. The use of DESMOFLEX TOP COAT, is recommended especially when applied dark colors exposed to the sunlight. (after 12-24hours of DESMOFLEX PU) In case of the surface is going to accept heavy circulation of pedestrians (e.g. stadium shuttles), apply two layers.
Storage
The pails must be stored in dry and cool rooms for up to 9 months from production date.