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ULTRASEAL® XL - Active polymer waterproofing membrane

Verified by manufacturer 6 months ago


An active polymer waterproofing membrane.

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Suitable for below ground applications such as backfilled cast-in-place concrete and property line construction such as contiguous/ secant piling and steel sheet piling.

Applications include:

  • Foundation walls.
  • Earth-covered structures.
  • Under slab.
  • Tunnels.


An active polymer waterproofing membrane, suitable in a wide range of ground contaminates, including high-saline

conditions. Unlike passive membranes when used alone, the self-sealing ability of the active XP technology enables the ULTRASEAL® XP waterproofing membrane to seal minor cuts or damage to the membrane.

Features and benefits:

  • Suitable as waterproofing protection for structural concrete surfaces under continuous hydrostatic and non-hydrostatic or intermittent hydrostatic conditions, including high-saline and contaminated environments.
  • Works by forming a low permeability membrane upon contact withwater.
  • When hydrated, the unconfined membrane can swell many times its dry volume.
  • When confined by backfill or concrete the swell is controlled, forming a dense, impervious waterproofing membrane.
  • This swelling action can seal small concrete cracks caused by ground settlement and concrete shrinkage.
  • When concrete is poured against the XP geotextile side, ULTRASEAL® XP forms a strong mechanical bond.
  • Contains zero VOCs, and can be installed in almost any weather condition directly to green concrete.
  • The membrane can be continued under the floor slab to provide a continuous, uniform waterproofing system.

General information








35000 mm

8700 mm


2300 mm

1150 mm


Pr_25_57_65_60 Plastics sheetsPrimary


J40/145 Loose-laid weldable polyethylene gas-retardant membranes

J20/110 Tanking

J40/285 Loose-laid bentonite damp-proofing/ tanking membranes

J40/20 Loose-laid plastics or rubber sheet damp-proofing

J40/30 Loose-laid plastics or rubber sheet oversite damp-proofing

Specification data - Plastics sheets




Waterproofing membrane.

Performance characteristics


Tensile strength (minimum)

8.0 N/mm² to EN ISO 527.

Elongation to break

25% to EN ISO 527.

Third-party certification

British Board of Agrément (BBA) Certificate.

Physical properties






Thickness (minimum)

Consult manufacturer for further information.


Width (minimum)

1.15 m.

Roll width, L = 8.7 m (10 m²/roll).

2.3 m.

  • Roll width, L = 8.7 m (20 m²/roll).
  • Roll width, L = 35 m (80.5 m²/roll).

Roll length (minimum)

8.7 m.

35 m.


Hydrostatic Pressure Resistance: 70 m to ASTM D 5385 (Mod).

Adhesion to concrete

1.7 kN/m (peel adhesion) to ASTM D 903 (Mod).

Puncture resistance

3.0 kN to EN ISO 12236.

Flexibility at low temperature

Unaffected at –32°C to ASTM D 1970.

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