Two-part elastomeric joint sealant based on polyurethane technology. It includes a base compound and curing agent which when mixed cure to form a tough rubber-like gun applied material. It is resistant to the bacteriological conditions associated with sewage treatment and silt accumulations in water storage and is designed to meet many of the requirements of the water industry in water retaining structures, sewage treatment and sea defence works. The abrasion resistance of Nitoseal PU12 also makes it suitable for use in sealing movement joints in concrete sea walls subject to tidal scour.


  • Abrasion resistant.
  • Excellent adhesion under immersed conditions.
  • Resistant to aerobic and anaerobic bacteriological attack.
  • Separate component available for accelerating the initial cure.

Primers can be specified separately.

General information


Abrasion resistant

Excellent adhesion under immersed conditions

Resistant to aerobic and anaerobic bacteriological attack

Separate component available for accelerating the initial cure

Primers can be specified separately

Uniclass 2015

Pr_30_31_76_02 Acrylic construction joint sealantsPrimary

Specification data - Acrylic construction joint sealants

Product Reference

Nitoseal PU12


Not required


Standard product features


  • Base: White paste.
  • Curing agent: Dark grey paste.

Technical properties:

  • Application temperature: 5–50°C.
  • Cure time: 48 hours (25°C), 96 hours (10°C).
  • Density: 1.44 kg/L.
  • Solids: 100%.

Product Options


For use in special circumstances to enhance the initial cure rate, such as sealing sea defence works in tidal areas.


Fosroc Sealants Brochure 2011

Fosroc Sealants Brochure 2011

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