Home > Companies > Langley Waterproofing Systems Ltd > PR-20 Pararapide Balcony and Walkway System

A two-component, resin-based, high performance, polymethylmethacrylate (PMMA) cold applied liquid waterproofing system with a catalytic action ensuring a fast, controlled curing. Designed to be mixed on-site.

Features and benefits:

  • Robust.
  • Seamless and flexible.
  • Includes reinforcement with a polyester fleece.
  • Permanently elastic.
  • UV stable.
  • Skid-inhibiting finish.
  • Not temperature dependent.
  • Quick to install, wet-on-wet application.
  • Good point load resistance.
  • The catalytic action ensures fast curing, even at low temperatures.
  • Life expectancy of approximately 25 years.
  • BBA certified.
  • Comes with a 20-year independently insured guarantee for materials and workmanship (only valid when installed by approved contractors).


  • Preparation: Pararapride primer (0.2–0.5 kg/m²) and Parapride self-levelling mortar (4 kg/m²).
  • Liquid applied waterproof coating: Parapide Quartz granules with clear coat sealer (3 kg/m²).
  • Surface protection: Pararapide Sealer Coat (0.5–0.6 kg/m²).
  • Reinforcement: Pararapide Fleece (110 g/m²).
  • Parapide WP (3 kg/m²).


Suitable for use for refurbishment where a skid-inhibiting finish is required, in areas such as walkways, stairways, and balcony areas. Can be used in conjunction with most common types of waterproofing, including asphalt and bituminous membranes.

A full range of supporting products is available - consult manufacturer for details.

Standard product features


PMMA quartz.


Dark grey.


10.8–11.2 kg/m².

Technical characteristics:

  • Fire performance: Broof [t4].
  • Curing time: 30 minutes per coat (the wet-on-wet application creates a total cure time of approximately three hours).
  • Slip resistance value: R12.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
20-50-30/130 Liquid applied cold roof covering system
20-50-30/140 Liquid applied warm roof covering system

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Langley Waterproofing Systems Ltd


+44 (0)1327 704778

Product reference

PR-20 Pararapide Balcony and Walkway System

Manufacturer details

Langley House,
Lamport Drive,
Heartlands Business Park,
Northamptonshire, NN11 8YH
Tel +44 (0)1327 704778
Fax +44 (0)1327 704845
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