Sikalastic® 625 - Liquid Applied Roof Waterproofing Membrane

Sikalastic-625® is a single component, cold-applied, moisture-triggered polyurethane membrane. It cures to form a seamless, durable and weather-resistant waterproofing solution for exposed roof areas.


  • Single component, ready to use.
  • Cold applied.
  • Easy and quick application – by spray, brush or roller.
  • Economic – provides a cost efficient life cycle extension of failing roofs.
  • Seamless membrane based upon moisture-triggered chemistry.
  • Vapour permeable.
  • Retains flexibility at low temperatures.
  • Fast curing, develops early rain resistance.
  • Minimal disruption and low maintenance.
  • Elastic properties – tolerant of thermal movement.
  • Flexible, impact resistant membrane.
  • Can be applied all year round above 2°C.


  • Waterproofing of flat and pitched roof structures.
  • Treatment of new construction and refurbishment of existing structures.
  • Applicable to existing concrete, roofing felt, brickwork, asbestos cement decks (subject to condition and priming requirements).


  • European Technical Approval No. ETA – 12/0788.
  • External fire performance: BRoof (t4) and classification under BS476-3: 2004 EXT.F.AC allowing unrestricted use under the current building regulations.