Technical Data Sheet

Date: 01.06.2011 – Version 10

e-lastic 420 Topcoat Aliphatic Polyurethane Top-Coat, UV-stable Domestic pedestrian traffic areas

Product description

e-lastic 420 Topcoat is a pigmented, color- and UV-stable, highly permanent elastic, cold applied and cold curing, one component aliphatic polyurethane coating, used as a top-coat for protection over exposed, polyurethane waterproofing coatings.

Cures by reaction with ground and air moisture over a unique moisture triggered chemical reaction.

Protects very efficiently, especially if a dark final colour is desired.


  • Simple application (roller or airless spray).
  • One component.
  • Increases the abrasion and wear resistance of the waterproofing membrane underneath.
  • UV and colour stable.
  • Gives a glossy and easy-to-clean surface.
  • Does not show the chalking effect of aromatic polyurethane coatings.
  • Resistant to water, heat and frost.
  • Maintains its mechanical properties over a temperature span of -40°C to +90°C.
  • The waterproofed surface can be walked on (domestic pedestrian traffic).


  • Waterproofing of Roofs
  • Waterproofing of Balconies, Terraces and Verandas
  • Waterproofing of Pedestrian Decks and Walkways
  • Protection of Polyurethane Foam Insulation

Used over e-lastic 250 Waterproofing Membrane on surfaces with domestic pedestrian traffic (e.g. Roofs, Terraces, Residential Walkways) that require a glossy, color-stable and non-chalking finish.


120 to 250 g/m² applied in one or two layers. This coverage is based on practical application by roller onto a smooth surface in optimum conditions. Factors like surface porosity, temperature, humidity, application method and finish required can alter consumption.


e-lastic 420 Topcoat is supplied in white, light grey and red. Other RAL colors can be supplied by special order, subject to minimum quantity requirements.

Technical Data *

Composition Pigmented Aliphatic moisture triggered
Polyurethane polymer. Solvent based
Resistance to Water Pressure No Leak DIN EN 1928
Elongation at break 289% DIN EN ISO 527
Tensile strength 3.72 N/mm² DIN EN ISO 527
Elongation at break after 2000h of accelerated
ageing (DIN EN ISO 4892-3, 400 MJ/m²)
372% DIN EN ISO 527
Tensile strength after 2000h of accelerated aging
(DIN EN ISO 4892-3, 400 MJ/m²)
2.68 N/mm² DIN EN ISO 527
Gloss retention after 2000h of accelerated aging
(DIN EN ISO 4892-3, 400 MJ/m²)
Good DIN 67530
Surface chalking after 2000h of accelerated aging
(DIN EN ISO 4892-3, 400 MJ/m²)
No chalking observed.
Chalking grade 0
DIN EN ISO 4628-6
Adhesion to the e-lastic 250 >2 N/mm² ASTM D 903
Hardness (Shore A Scale) 65 ASTM D 2240 (15”)
Solar Reflectance (SR) (White Colour) 93.5% ASTM E903-96
UV accelerated ageing, in the presence of moisture Passed - No significant changes EOTA TR-010
Hydrolysis (5% KOH, 7days cycle) No significant elastomeric change Inhouse Lab
Service Temperature -40°C to +90°C Inhouse Lab
Tack Free Time 1-3 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.