Description
ISOCRYL PU MAX is a high-performance elastomeric, liquid applied waterproofing membrane based on aliphatic polyurethane. Its innovative solvent free formula reinforced with nanofibers, ensures excellent long-term durability and great crack bridging properties. It protects old and new surfaces by forming a single, 100% waterproof and vapor-permeable elastic membrane without joints. It has high resistance to moisture, stagnant water, withstands very low and high temperatures while remaining unaffected by UV rays. It is the ideal waterproofing membrane for demanding applications and long-term waterproofing.
ADVANTAGES
- 20 years durability – Aliphatic PU technology
- Ponding water resistance
- Fast drying formula – minimizes labor costs
- Contains nanofibers
- Excellent small joint – crack bridging
- The waterproofed surface can be walked on
- Excellent dirt pickup resistance
- Excellent elasticity up to 400%
- Highly reflective to sun UV rays
- Offers better thermal insulation properties
- Superior adhesion on most building surfaces
- Excellent resistance to moisture and water
- Maintains its mechanical properties over a temperature span of -20oC to +90oC
- Excellent resistance to ageing & UV exposure
- User and environmentally friendly
- Easy to apply (one component – ready to use material)
APPLICATIONS
- Waterproofing of rooftops and terraces
- Waterproofing and protection of concrete structures
- Waterproofing bitumen and polyurethane hard foam surfaces
- Suitable for common construction surfaces, including cementitious surfaces, bituminous materials, wood, stone, bricks, PVC, polyurethane foam, drywall, plaster, metal surfaces and much more.
Specifications
 |
 |
 |
 |
|
Coverage:
Without reinforcement: 1,0 – 1,5 kg/m2 applied in 2 or 3 layers
With reinforcement: 1,5 – 2,3kg/m2
|
Thinning:
0 - 10% with water
|
Application:
by brush
|
Application:
by brush
|
 |
 |
 |
 |
|
Application:
by roller
|
Application:
by spray gun
|
Touch dry:
24 hours
|
Hard dry:
7 days
|
 |
 |
 |
|
|
Interior use
|
Application temperature:
+8oC to +35oC
|
Cleaning:
With soap and water
|
|
|
Instructions for use
Substrate preparation
Careful surface preparation is very important for optimum finish and durability.
- The surface needs to be clean, dry, sound and free of any contamination that may harmfully affect the adhesion of the membrane.
- Maximum substrate moisture content should not exceed 6%.
- New concrete structures need to dry for at least 28 days.
- Old, loose coatings, dirt, fats, oils, organic substances and dust need to be removed by mechanical means such as a sanding machine. Possible surface irregularities need to be smoothened.
Repair of cracks
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 ISOCRYL PU MAX. 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 ISOCRYL PU MAX.
- 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 SOMIX MECHANIC R4 and after the cement has dried apply polyester fabric and two layers of ISOCRYL PU MAX.
- 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 ISOCRYL PU MAX.
Priming
- Prime absorbent surfaces like concrete, cement screed, wood with solvent-based primer ISOCRYL PRIMER DUR, or water-based primer ISOCRYL PRIMER DUR AQUA. Allow drying for 2 – 4 hours.
- Prime non-porous or difficult surfaces (metal, ceramic tiles, plastics) with EPOXITE DUR AQUA.
- On stable, high-quality cementitious substrates, the material may be used as a primer when diluted with 20% water.
Application
- Stir ISOCRYL PU MAX well before use.
- Dilute 10% with clean water, then apply the first layer using a roller, brush or airless spray.
- When the first layer has dried (6 – 24 hours), apply a second coat with dilution up to 5% in a crosswise direction over the first coat.
- For enhanced protection and insulation, or when required, apply a third coat.
- Surfaces can be walked on at least after 48 hours.
- Application of ISOCRYL PU MAX must be avoided at temperatures below 8oC and above 35oC and when frost or rain is expected within 48 hours.
RECOMMENDATION
When waterproofing terraces with many
hairline cracks, it is recommended to reinforce ISOCRYL PU MAX with geotextile fabric over the entire waterproofing surface. For applications requiring enhanced walkability and maximum resistance to adverse weather, an additional layer of white DRYMAX POLYURETHANE TOPCOAT is recommended.
ATTENTION
Do not apply ISOCRYL PU MAX over 0,5 mm thickness per layer (0,75kg/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 ISOCRYL PU MAX in negative temperatures or when rain or frost is imminent within the next 48 hours.
Cleaning
Clean all tools and equipment with water and soap right after
applications. Cured material can be removed only by mechanical
means.
