Technical Data Sheet

Date: 01.06.2011 – Version 10

e-lastic 250 Liquid-applied polyurethane waterproofing membrane

Product description

e-lastic 250 is a premium, liquid-applied, semi-thixotropic, highly permanent elastic, cold applied and cold curing, one component polyurethane membrane used for long lasting waterproofing. e-lastic 250 is based on pure elastomeric hydrophobic polyurethane resins, which result in excellent mechanical, chemical, thermal, UV and natural element resistance properties. Cures by reaction with ground and air moisture.


  • Simple application (roller, brush or airless spray).
  • Semi-thixotropic (for use on sloped surfaces)
  • When applied forms a seamless membrane without joints.
  • Resistant to water.
  • Resistant to frost.
  • Resistant to root penetration, so it can be used in green roofs.
  • Crack-bridging up to 2mm, even at -10°C.
  • Provides water vapour permeability, so the surface can breathe.
  • Provides excellent thermal resistance, it never turns soft.
  • Waterproofs old bitumen and asphalt felts by covering them, without the need to remove them prior to application.
  • Provides excellent weather and UV resistance.
  • Provides high sun reflectivity, contributing to thermo-insulation.
  • Maintains its mechanical properties over a temperature span of -40°C to +90°C.
  • Provides excellent adhesion to almost any type of surface.
  • The waterproofed surface can be used for domestic and public pedestrian and vehicular traffic.
  • Resistant to detergents, oils, seawater and domestic chemicals.
  • Even if the membrane gets mechanically damaged, it can be easily repaired locally within minutes.
  • Does not need the use of open flames (torch) during application.
  • Over 15 years of positive feedback worldwide.


  • Waterproofing of Roofs
  • Waterproofing of Balconies, Terraces and Verandas
  • Waterproofing of Wet Areas (under-tile) in Bathrooms, Kitchens, Balconies, Auxiliary Rooms, etc
  • Waterproofing of Pedestrian and Vehicular traffic Decks
  • Waterproofing of Green Roofs, Flowerbeds, Planter Boxes
  • Waterproofing of old Bitumen felts, Asphalt felts, EPDM and PVC membranes and old Acrylic coatings
  • Protection of Polyurethane Foam Insulation
  • Waterproofing and protection of Concrete constructions like Bridge-Decks, Tunnels, Stadium Stands, Car Parks, etc.


1.4 to 2.5 kg/m² applied in two or three layers. This coverage is based on application by roller onto a smooth surface in optimum conditions. Factors like surface porosity, temperature and application method can alter consumption.


e-lastic 250 is supplied in white and light grey. Other colors can be supplied by special order, subject to minimum quantity requirements.


e-lastic 250 was tested by the German state testing institute for construction materials MPA-Braunschweig according the European Union Directive for liquid-applied roof waterproofing kits ETAG 005 and was found conforming.

e-lastic 250 was certified by the German state Institute for construction techniques DIBt–Berlin with the European Technical Approval (ETA) and with the CE-mark and certification according to the EOTA (European Organization of Technical Approval).

e-lastic 250 was also tested and approved by various laboratories in different countries around the world.

European Technical Approval: ETA05/0197 DIBt. Levels of use categories according to ETAG005, for liquid-applied Polyurethane waterproofing kits
Working life W2 10 Years
Climate Zone M and S All
Imposed loads P1 to P3 High
Roof slopes S1 to S4 <5° to >30°
Lowest surface temp. TL3 -30°C
Highest surface temp. TH4 +90°C
Reaction to fire Class E EU Norm
Resistance to wind loads ≥50 kPa EU Norm

Technical Data *

Elongation at Break ≥ 800 % ASTM D 412 / DIN 52455
Tensile Strength ≥ 4 N/mm² ASTM D 412 / DIN 52455
Water Vapour Permeability ≥ 25 gr/m²/day ISO 9932:91
Resistance to mechanical damage by static impression High Resistance (class:P3) EOTA TR-007
Resistance to mechanical damage by dynamic impression High Resistance (class:P3) EOTA TR-006
Resistance to Water Pressure No Leak (1m water column, 24h) DIN EN 1928
Adhesion to concrete ≥2,0 N/mm² (concrete surface failure) ASTM D 903
Crack Bridging Capability up to 2mm crack EOTA TR-008
Hardness (Shore A Scale) 65 ASTM D 2240 (15”)
Resistance to Root Penetration Resistant UNE 53420
Solar Reflectance (SR) 0.87 ASTM E903-96
Solar Emittance (⫕) 0.89 ASTM E408-71
Thermal Resistance (80°C for 100 days) Passed - No significant changes EOTA TR-011
UV accelerated ageing, in the presence of moisture Passed - No significant changes EOTA TR-010
Resistance after water ageing Passed EOTA TR-012
Hydrolysis (5% KOH, 7days cycle) No significant elastomeric change Inhouse Lab
Construction Material Fire class Β2 DIN 4102-1
Resistance to Flying Sparks and Radiating Heat Passed DIN 4102-7
Service Temperature -30°C to +90°C Inhouse Lab
Shock Temperature (20 min) 200°C Inhouse Lab
Rain Stability Time 4 hours Conditions: 20°C, 50% RH
Light Pedestrian Traffic Time 12 hours
Final Curing time 7 days  
Chemical Properties Good resistance against acidic and alkali solutions (5%), detergents, seawater and oils.

* All values represent typical values and are not part of the product specification.