Description
FLEX MASTER PU HYBRID is one component, liquid-applied, hybrid waterproofing membrane based on polyurethane and synthetic acrylic resins. It is suitable for waterproofing old and new building surfaces. It forms an elastic seamless vapor permeable membrane without joints with excellent resistance to humidity, weather conditions as well as high temperatures and UV rays.
ADVANTAGES
- Hybrid technology – ponding water resistance
- Elastic, seamless, vapor permeable and reflective membrane without joints
- Excellent elasticity
- Superior adhesion on most building surfaces
- Excellent water - humidity resistance
- Maintains its mechanical properties over a temperature span of -15oC to +70oC
- Excellent resistance to ageing and UV rays
- User and environmentally friendly - does not contain organic solvents
- Simple application – DIY friendly
- Waterbased - nonflammable - easy to clean
APPLICATIONS
- Waterproofing of rooftops and terraces.
- Waterproofing of gutters, domes, cornices, ondulated panels etc.
- Waterproofing bitumen and polyurethane hard foam surfaces.
- Suitable for concrete surfaces, bitumen material, stone, brickwork, PVC, polyurethane foam, plaster, metal etc.
Specifications
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Coverage:
1 - 1.5Lt / m2
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Thinning:
0 - 10% with clean water
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Application:
by brush
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Application:
by roller
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Application:
by spray gun
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Touch dry:
8 hours
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Hard dry:
24 - 48 hours
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Exterior use
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Application temperature:
+8oC to +35oC
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Cleaning:
with soap and water
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Instructions for use
Substrate preparation
Careful surface preparation is essential for optimum finish and durability.
The surface needs to be clean, dry and sound, free of any contamination, which may harmfully affect adhesion. Remove any loose parts. Fresh concrete needs at least 28 days to set. Humidity should not exceed 6%. Previous coatings, grease, plant organisms and dust should be removed with the use of a floor sanding machine and washed with high-pressure water. Surface irregularities must be smoothed out. Loose parts or sanding dust must be removed.
Repair of cracks and joints
The careful sealing of cracks and joints before the application is extremely important for long lasting waterproofing results.
- Carefully clean cracks and joints from dust, grease, loose debris.
- Capillary and small cracks up to 3mm must be primed with ISOCRYL PRIMER DUR AQUA water-based primer or ISOCRYL PRIMER DUR solvent-based primer and allow drying. Apply a layer of FLEX MASTER PU HYBRID. Immediately apply on wet surface polyester fabric (capillaries) or fiberglass tape (small cracks) 30 – 60 gr/m2 respectively and again two more successive layers of FLEX MASTER PU HYBRID.
- Cracks from 3mm to 20mm and expansion joints are primed with PRIMER PU 900 and then sealed with polyurethane sealant BONDFLEX 290LM.
- Larger cracks and holes are closed – smoothed with the fiber-reinforced repair cement mortar ISOMIX MECHANIC R4 and after the cement has dried apply polyester fabric and two layers of FLEX MASTER PU HYBRID.
- Assembly points such as water heater bases, air conditioners, stairs, antennas, etc. must be sealed with a thick layer of ISOCRYL REPAIR thixotropic, fiber reinforced roof coating and allow drying before proceeding with the application of FLEX MASTER PU HYBRID.
Priming
- Prime absorbent surfaces like concrete and cement screed with solvent-based primer ISOCRYL PRIMER DUR, or water-based primer ISOCRYL PRIMER DUR AQUA. Allow to dry for 1 - 2 hours.
- Prime non-porous or difficult surfaces (aluminum, plastics) with EPOXITE DUR AQUA.
Application
- Apply FLEX MASTER PU HYBRID on the primed surface diluted 5% - 10% with clean water, using a brush, roller or spray gun. Allow to dry for 8 - 16 hours.
- Apply a second layer crossways to the first layer, diluted 5% with water.
- For extra protection or where required a third layer may be applied.
- Surfaces can be walked on at least after 24 - 48 hours. New treated surfaces exhibit a tackiness at the beginning, which disappears in due time.
For best results, the temperature during application and cure should be between 8oC and 35oC. Application must be avoided when rain or frost is expected. Make sure that the surface temperature is between 5oC and 35oC as direct sun exposure can increase this to more than 50oC.
RECOMMENDATION: We recommend reinforcement of the entire surface, with fiber cloth, by applying one coat before the reinforcement and 2 coats after. On surfaces with frequent pedestrian traffic, apply a layer of DRYMAX POLYURETHANE TOPCOAT after FLEX MASTER PU HYBRID to increase abrasion resistance.
ATTENTION: Do not apply FLEX MASTER PU HYBRID over 0,5 mm thickness per layer (0,5Lt/m2). For best results, the temperature during application and curing should be between 8oC and 35oC. Low temperatures delay curing while high temperatures speed up curing. High humidity may affect the final finish. Do not apply FLEX MASTER PU HYBRID in negative temperatures or when rain or frost is imminent within the next twenty-four hours.
CLEANING
Clean all tools and equipment with water and soap right after application. Cured material can be removed only by mechanical means or varnish and paint remover MERCOLA STRIPP & CLEAN.
