A professional, hybrid sealing polymer, liquid emulsion, made from polyurethane resins and when dry, creates a long lasting sealing membrane.



  • Easy application
  • Excellent adhesion
  • Resistant to UV rays 
  • All Weather resistance
  • Long lasting protection of the substrate
  • Crack-bridging  
  • Highly elastic
  • Extremely waterproof



Ideal for all types of exposed roofs (old or new) and balconies.

Product Identity

  • Appearance: Paste – Acrylic Styrene
  • Colour: White
  • Packaging & Weight: Plastic buckets of 1kg, 5kg, 10kg and 20 kg
  • Storage: 12 months in unopened packing
  • Solids Content (% w/w): 60 ± 2 %  

Application Data

  • Application temperature: +5ºC-+35ºC
  • Waiting time between two coats: 4-6 h
  • Consumption: 0.7 kg/m2 for two coats
  • Drying time: about 6 hours  

Final Performance

  • Elongation, at  23oC: 600%
  • Tensile Strength, at 23oC  : 1.5 Ν/mm2
  • The product is ready to use (optionally 10 – 15% dilution with water, only for the application of 1st layer).
  • If necessary stir the content before use, until of obtaining a homogeneous mixture.
  • ALFALIQUID SEAL is applied in 2 layers of 0.4 – 0.5 mm thickness by roller or brush or spray machine, after the primer has dried. 
  • Start applying the 2nd layer once 1st layer has been completely dry. (about 4-6 hours, depends on temperature, humidity and substrate conditions). The 2nd layer should follow crosswise of the 1st one.
  • Protect the primed surface from dust or rain until it becomes completely dry (about 6 hours, depends on weather conditions

Substrates Preparation

  • All substrates, whether they are new or old, must be solid, clean, dry and free of all traces of oil, old paint, grease, mould and any other material which could compromise the bond.
  • Αny existing cavities in concrete surfaces should be repaired in advance.
  • Standing water should not exist at time of applying Alfa Liquid Seal. If your roof is experiencing pitching issues which have caused ponding water, consult with a professional to help you taking the right course of action.
  • Pre-treat the surface with primer or dilute Alfa Liquid Seal with 10-20% water to allow using it as primer.

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