Roofing Underlayments

Premium performance underlayment, protecting roofs since 1978.

For architects and roofing contractors, roofs are a source of everlasting concern.  70% of all construction litigation is related to leaks, and every leak is a lost opportunity, representing a cost to repair and a corresponding loss of customer trust. Severe weather seems to be the new normal and the risk of damage from ice dams and wind-driven rain are higher than ever.  Underlayments are the last line of defense in a roofing system, and selection of high quality underlayments can be the difference between success and failure.

Protecting the roofs of over 2 million homes, and installed on marquee projects in 25 countries since its introduction in 1978, these high performance solutions provide superior performance and excellent value.

Outperforming the competition, letting contractors shine and keeping families safe and dry.

Full System

PREPRUFE Plus and BITUTHENE membranes are designed to give you the ultimate below grade waterproofing system for your project.

From residential to large scale commercial projects, PREPRUFE Plus and BITUTHENE have proven to be the most reliable solution for any project.

Pre-Applied: Below Slab Horizontal

High performance, durable, below grade waterproofing.

The immense hydrostatic pressure outside structures puts foundations at high risk of water infiltration.  In addition, many projects are suseptible to corrosion and dangerous fumes from contiminated soil.

PREPRUFE Plus Waterproofing Membranes provide a high performance barrier against water and moisture, aggressive soils, as well as hazardous gases such as radon and methane.

GCP Applied Technologies are the pioneers in this market with PREPRUFE Membrane Waterproofing Systems, the first ever bonded, pre-applied waterproofing membrane.  Since its introduction, GCP Applied Technologies has continued to refine this unique and innovative technology.  Building on a 25 year track record of success, the PREPRUFE Plus Waterproofing Membrane system delivers unparallelled performance and ease of installation.

Pre-Applied: Walls

With the PREPRUFE Plus Waterproofing Membrane, structures can be protected throughout their lifetime.  Made of a patented HDPE geomembrane, PREPRUFE Plus Waterproofing Membranes form an intimate bond with poured concrete, helping to prevent costly damage from floods, mold, mildew and gas fumes.

PREPRUFE Plus Waterproofing Membranes also stand up to dirt, foot traffic and UV exposure, preventing damage before the concrete is poured.

Post Applied: Vertical

Basement walls, tunnels, metro stations and infrastructure projects.

BITUTHENE 3000 developed by GCP Technologies is suitable for eachof these applications and more. 

BITUTHENE 3000 waterproofing system is the most trusted post-applied waterproofing membrane.  Its effectiveness has been proven time and again in countless projects.

Long lasting, versatile and easy to install, BITUTHENE 3000 gets the job done.

Supadeck BG

Supadeck BG is a polyurethane waterproofing system which displays excellent elongation and flexibility.

For use in non habital space situations such as retaining walls.

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Technical Information

Product Technical Data Sheets Specifications
(green / damp surface)
B2 Primer
Bituthene water Dispersed
Primer Type C
Bituthene Liquid Memrane
Bituthene 3000 TDS Specification
Bitustik 4000 TDS  
Preprufe Plus 160 and 300 TDS Specification

Preprufe Tape
Detail 50mm x 15m
Standard 100mm x 15m
Construction Joint 200mm x 15m
Allnex K80 
Re-profilling Pile Caps
Swellseal Mastic WA TDS  
NPX Drainage and Protection Board TDS  
Adcor 500T TDS  
Supadeck BG TDS Specification