Polyurethane is a base material technology for liquid membranes and at the same time it is a key competence of Sika for many years. Developments and know-how, modern production facilities, wide product range and extensive experience allows Sika to be a solid world market leader for polyurethanes in variety of application fields.

Advantages of Sika PU Waterproofing Membrane

FEATURES ADVANTAGES BENEFITS

Liquid applied

  • Easy to adjust to complex details
  • Ideal for refurbishment
  • No penetration of the existing roof deck
  • Fast, easy and safe application
  • Extend life cycle of old or leaking roofs without interruption
  • Lower risk of roof failure

Versatile

  • Suitable for various type of roof structures and substrates
  • Ideal for refurbishment
  • More possible applications
  • Extend life cycle of old or leaking roofs without interruption
Highly elastic, retains flexibility even at low temperatures
  • Good crack bridging property even at low temperatures
  • Lower risk of roof failure even in cold climate

Seamless

  • No joints or seams
  • Lower risk of roof failure

Zero flame technology

  • Reduction of fire risk
  • Safety
Fully adhered to the substrate
  • No water infiltration between substrate and membrane in case of a leakage
  • Easy locating in case of leakage
  • Lower risk of roof failure
High UV resistance
  • Durable waterproofing for exposed roofs
  • Lower risk of roof failure
  • Longer life expectancy
Vapor permeable
  • Allows the substrate to breath
  • Entrapped moisture can evaporate: no blistering
Variety of color options
  • Allow design freedom
  • More possible applications
High solar reflectance index when applied in white color
  • Ideal for cool roofs and solar roof
  • Energy efficiency improvement
Need technical assistance?

One-Component Polyurethane

One-component polyurethane based liquid applied membranes and roof coatings were invented in 1960s and represent an indispensable technology in today’s roofing industry. Due to their high mechanical properties and flexibility, particularly at lower temperatures, as well their capability to cure under a wide range of conditions, polyurethane based liquid applied membranes can also be used in climatically challenging environments.

FEATURES ADVANTAGES BENEFITS

Fast curing

  • Rain resistant almost immediately after application
  • Fast overcoating
  • More flexibility of application in unstable weather situation
  • Time saving
UV stable and resistant to yellowing
  • Keeps high solar reflectance index (SRI)
  • Constant energy efficiency performance
One-component
  • Easy and ready to use
  • Time saving in application
  • No risk of mixing errors
Convenient packaging in tins
  • Handy transportation
  • Easy handling
  • Flexibility in application
  • Cost saving for site handling
Technology
MTC Technology

Sika’s Moisture Triggered Chemistry (MTC) systems incorporate a unique technology that allows the material to use atmospheric moisture to trigger the curing process. This means the waterproofing membranes are capable of curing in a wide range of conditions including extreme temperature ranges and humidity variations. Unlike traditional polyurethane systems they do not release CO2 , which often causes gassing, and application is not delayed by adverse weather conditions.

i-Cure Technology

Sika’s i-CURE based liquid applied membranes represent the new generation polyurethane liquid applied membrane technology. Featuring a reduced solvent content and a new Sika patented i-Cure hardener for lower odor development during and after the curing process, this technology has overall reduced odor emission and makes the products suitable for sensitive projects such as hospitals, schools, food and pharma industries, etc..

Products

Two-component Polyurethane / Polyurea

The demand for two-component polyurethane/polyurea (PU/PUA) based liquid applied membranes has risen in the last decade.

The fast and efficient application method by two-component spray machines makes it particularly suitable for large surface application and industrial application. Once the product is mixed in front of the application nozzle and applied to the surface it cures within seconds, allowing a fast over coating or early pedestrian traffic.

Sika has adapted the two-component PU/PUA hybrid technology to cold applications and hand-applied systems, making it now possible to do installations where hot spray is not efficient, while maintaining the same performance characteristics.

FEATURES ADVANTAGES BENEFITS
Very fast curing
  • Trafficable almost immediately after application
  • Rain resistant almost immediately after application
  • Fast overcoating
  • More flexibility of application in unstable weather situation
  • Time saving
Fast application especially for large area
  • Fast project progress
  • Time saving
Solvent free and 100% solids
  • High material yield
  • Economical waterproofing solution: very cost saving
Technology
Two-component Hot Spray Technology

Sika’s two-component hot spray applied roofing membranes are based on polyurethane/polyurea hybrid, and combine the high mechanical strength and abrasion resistance of a polyurea with the flexibility and low modulus of elasticity of a polyurethane, making the systems ideal for roof waterproofing, were a durable and flexible membrane is required.

Sika’s two-component hot spray applied roofing membranes are solvent free with solid content of 100%, resulting in efficient consumption rates without any material loss due to evaporation of water or solvents. Combined with its fast application method with two-component spray equipment this type of technology is very efficient and economic, particularly for large surface applications. In addition the fast curing of this technology allows pedestrian traffic and the application of a UV protective top coat on exposed roofs after a few minutes and makes it ideal for projects where a fast progress is important.

Products

Applicable Substrates for PU Waterproofing Membrane

Liquid applied membrane substrate bitumen
Bitumen
Liquid applied membrane substrate metal
Metal
Liquid applied membrane substrate concrete
Concrete
Liquid applied membrane substrate bricks and stones
Bricks and stones
Liquid applied membrane substrate roof tiles
Roof tiles
Liquid applied membrane substrate copper
Copper
Liquid applied membrane substrate wood
Wood
Liquid applied membrane substrate fiber cement
Fiber cement

PU Waterproofing Membrane Application Area

Cool Roof
Cool roof
Liquid applied membrane detail on roof
Exposed Roof
Sustainability: High Rise building with green terraces
Green Roof
Roof refurbishment work of the Leaf Factory in Italy
Refurbishment of old roof

Easy Detailing with PU Waterproofing

Liquid applied membrane
Liquid applied membrane on roof terrace
Liquid applied membrane
Liquid applied membrane

You May Also Be Interested In