Polyurethane waterproofing membrane – advantages- Polyurethane-based waterproofing membranes is a liquid applied system that offers decisive advantages particularly where seamless systems are desired
2. Polyurethane waterproofing
membrane Advantages
Easy and fast installation
seamless finish
Long term durability and wear-resistant
UV and weather-resistant
Resistant to alkaline cleaners, battery acid and
fuels
No significant load increase on lightweight decks
and roofs
Resistance to freezing temperature
Strong adhesion
Easy and fast installation
Perfect and aesthetic appearance
Resistance to corrosion
3. The application method of
Polyurethane Waterproofing
Membrane
The roof surface must be thoroughly cleaned
Any cracks on the surface preparation bed is
cut to V section, cleaned and filled with a 1 part
polyurethane based crack filling compound
The surface must be neutralized by removing
alkalinity
A two pack polyurethane primer coat is first
applied to the surface to serve as an adhesion
coat
Primer coat is mixed in the ratio as per
Manufacturers’ specification.
4. The application method of
Polyurethane Waterproofing
Membrane
A single coat of this primer is applied by brush over the prepared
bed as an adhesion coat. The primer is then allowed to dry for a
minimum of 8 hours before the successive finishing coats of PU
are applied
Allow to dry for at least 8 hours.
PU coat is applied by brush or roller in 2 layers. The first layer is
applied 2-3 hours after priming/ The second layer should be
applied crosswise after 8-24 hours, depending on the weather
conditions.
The PU coating is continued 150 mm up the parapets or walls. It
should also be continued at least 100 mm into the rainwater pipes
The final Polyurethane coat is sprinkled with a micron layer of
clean sand.
5. Application areas
Flat roofs
Pitched roofs
Balconies
Plaza decks
Patio
Water tanks
In wet damp floor areas from internally
and externally
Used to fill the gaps and cracks formed
in the walls or floors of buildings such as
tunnels, bridges, concrete wall
6. Different types of
Polyurethane Waterproofing
Membrane Products
Single component, ready to use elastic
material
One-component polyurethane primer
Two-component polyurethane primer
Polymer-modified, fiber-reinforced repairing
cement mortar
Polyester fleece for reinforcing waterproofing
layers
Polyurethane sealants
Aliphatic polyurethane-based, ready-to-use
membrane