Aquastop Liquid


Semi liquid, self-levelling MS-polymer

Environmentally friendly and almost odourless

Easy to use

View technical details
Available packages & colors

General info

Why is it perfect for experts?


Semi liquid, self-levelling MS polymer which, after hardening, creates a 300% stretchable and 100% waterproof membrane.

Replaces most products such as liquid rubbers, tar coatings,...


  • UV-, chemical and weather resistant
  • Environmentally friendly and almost odourless
  • Easy to use
  • Fast curing (2,4mm/24h. at +23°C and 50% > RH)
  • Immediately waterproof
  • Polymerisation by humidity
  • Contains no rubber or bitumen
  • Free of isocyanates, solvents and plasticizers (phthalates)
  • VOC free (volatile organic compounds)

Why use Aquastop Liquid ?

Aquastop Liquid is a thick, self-levelling liquid which is applied with a spatula, floor squeegee, brush or foam roller.


  • Waterproofing of sub-floor* (bathroom, shower, laundry room, etc.).
  • Repair of metal and plastic roof gutters and drains.
  • Bonding of floor coverings such as tiles, cork, laminate, carpet, insulation panels, rigid foam, PIR, PUR, etc.
  • Renovation and protection of timber structures such as porches, decks, garden panels, etc.
  • Repair of lead and zinc corrosion.
  • Renovation and repair of boats, caravans, mobile homes, etc.
  • Roof repair: on bitumen, tiles, slates, PVC, zinc, etc.
  • Protection of underground garden timber.



  • Make sure the substrate is stable, dust- and grease-free.
  • Start by strengthening weak and porous substrates with Fixprimer.
  • Fill joints or cracks with Aquaseal. Aquastop Liquid can be applied after 30 minutes.
  • Reinforce areas that are weak and/or prone to cracks with Aquastop Tape:
    • Roof pass-throughs, connections, corners
    • Cracks or joints
    • Transitions between different materials or structures


  • Apply Aquastop Liquid in a single layer at least 2 mm thick for optimal waterproofing and UV resistance.
  • Apply with a spatula, brush or squeegee.


  • Immediately clean tools with TEC7 Cleaner and hands with Powerwipes. Cured Aquastop Liquid can only be removed mechanically.
  • A rain or hail shower can deform the surface if it strikes during the first 6 hours.
  • Keep a container of Aquastop Liquid as airtight as possible once opened, by closing the inner liner.

This prolongs the shelf life of the opened pot of Aquastop Liquid for a short period of time.

Technical information

Aquastop Liquid
Aquastop Liquid


  • Basis: MS polymer.
  • Colour: black.
  • Density: 1,45 kg/dm³.
  • Viscosity: thick liquid.
  • Shore hardness - DIN 53505: after 3 weeks at 23°C and 50% R.H.: 35 Shore A.
  • Shrinkage - DIN EN ISO 10563: ≤ 4.0%.
  • Tensile strenght: 10 kg/cm².
  • Elongation at break: approx. 300%.
  • In conformity with the European standard ETAG Nr. 005.
  • Module at 100% elongation and +23°C - DIN 53504 S2: ≥ 0.6 N/mm².
  • Application temperature: +5°C to +35°C.
  • Temperature resistance (cured): -40°C to +90°C.
  • Open working time at 23°C and 50% R.V.: max. 30 min.
  • Curing 24h: 2,5 mm (+23°C, 50% RH) 100% chemically stable and resilient after 7 days (at 23°C and 50% RH).
  • Chemical resistance: good: water, aliphatic solvents, oils, greases, diluted organic acids and alkalis; moderate: esters, ketones and aromatics; bad: concentrated acids and chlorinated hydrocarbons.
  • Weather resistance: perfect.
  • Water vapour transmission (DIN EN ISO 12572): 3,3.
  • Shelf life: 12 months in unopened original packaging, stored in cool, dry and frost-free environment.
  • Safety measures: Please consult the safety data sheet.