The Best External Waterproofing For Below Ground Structures

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1 The Best External Waterproofing For Below Ground Structures Preprufe Advanced Bond Technology TM

2 Preprufe...the most advanced Poured concrete bonds to Preprufe... zero tracking between waterproofing and structure. Innovative Technology Preprufe is the world s first waterproofing system engineered for below slab and blind side applications. 1. Preprufe membrane is applied to prepared substrate or formwork before concreting. 2. Steel rebar and concrete is placed directly on membrane with no need for additional protection. 1. Microporous surface layer for weather ability and trafficability 2. Highly aggressive pressure sensitive adhesive layer 1. Microporous surface layer 3. for Robust weather HDPE ability membrane and trafficability self adhesive lap 2. Highly aggressive pressure sensitive adhesive layer 3. Robust HDPE membrane self adhesive lap Designed with synergistic adhesive layers, Grace s patented Advanced Bond Technology enables concrete to aggressively adhere to Preprufe. The unique Preprufe bond prevents any water tracking between the waterproofing and the structure. No other system on the market protects a substructure better from the harmful effects of water, vapour and gas than Preprufe. 3. A permanent, continuous adhesive bond develops as concrete hardens. concrete slab Mechanical and adhesive forces combine at concrete/membrane interface to provide a unique continuous bond and seal The Value of Preprufe The problem of water migration water tracking between the membrane and structure is well recognised by industry experts. Once a conventional membrane is breached the whole structure is vulnerable, so where a leak becomes visible is often a considerable distance from the actual source. This can make leak remediation haphazard and expensive. Preprufe keeps water in its place Preprufe is a reliable, practical and effective solution to the risks of water migration on any project, large or small. Only Preprufe s unique adhesive bond to poured concrete fully localises any leak and keeps water on the outside. Preprufe s intimate bond to concrete shown under a microscope.

3 waterproofing available. Engineered Durability Backed with resilient HDPE, Preprufe is inherently waterproof, with excellent chemical resistance and low vapour permeability. There is no risk of premature activation caused by wet weather, or performance variability depending on soil type. Crucial properties are retained for the life of the structure. Preprufe is durable enough to withstand traffic and weather and still retain premium waterproofing performance. Once concrete is poured, mechanical and adhesive forces combine to generate a powerful and permanent bond. Preprufe removes the variables from waterproofing protection Other technologies require activation by water, confining pressure or favourable soil conditions, or rely on a basic mechanical interlocking. Preprufe excels in all soils, withstanding both intermittent and permanent hydrostatic pressure, and is unaffected by ground settlement. Advantages Continuous adhesive bond to poured concrete Zero water tracking for low cost leak remediation Fully sealed laps that also maintain continuous bond to concrete Water, vapour and gas-proof Unaffected by ground settlement Lightweight and easy to install Backed by Grace expertise Proven performance on major projects worldwide Applications Basements Underground parking Foundations Tunnels Metros Libraries and archives Underpasses Retaining walls CERTIFICATE No. BRITISH BOARD OF AGREMENT 97/ /3526

4 waterproofing available. Double Sealing Performance The effectiveness of a waterproofing system relies on the performance of both the membrane overall and the overlaps. Preprufe uniquely provides a double level of protection with self-sealing overlaps plus a membrane that seals integrally to the structural concrete. 1. Laps formed using the self-adhesive selvedge provides the first barrier to water infiltration. 2. The special Preprufe adhesive matrix forms a continuous and intimate seal to the concrete to provide the second level of protection. Proven Resistance to Water Migration Preprufe has been proven to resist water migration under independent supervision by measuring the resistance to hydrostatic pressure at a simulated break in the membrane. potential water path P ASTM D5385 test method was modified using Preprufe membrane with a patch removed. Tubes were placed remote from the opening to simulate water paths through the concrete. No leaks or water migration was detected up to 80m head of water. Detailing Ancillaries Penetrations through slabs and walls are highly vulnerable to water ingress. At these points, it is essential to achieve an effective seal between the membrane and the penetration. Grace have developed Bituthene LM, a two component trowel applied liquid membrane to seal these penetrations. Bituthene LM has excellent adhesion to most substrates and is elastomeric when cured. This key ancillary product further reduces the risk of water penetration into structures. Adcor Bituthene LM Preprufe

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7 Complete Waterproofing Systems From Grace Construction Products Preprufe is compatible with Grace s post- applied products, Procor and Bituthene, and allows effective enveloping of foundations with a flexible, fully adhered waterproofing barrier. Grace is a single source solution for virtually any below ground application. For System Information call +44 (0) KEY WATERPROOFING PRODUCTS SALES LOCATIONS WORLDWIDE HEADQUARTERS United States of America W.R. Grace Co.-Conn. 62 Whittemore Avenue Cambridge MA Tel Fax EUROPE France Grace Produits de Construction S.A.S rue de Maisonneuve F Saillenard Tel +33 (0) Fax +33 (0) Poland Grace Sp. z o.o Al. Jerozolimskie 92 PL WARSZAWA Tel Fax EUROPEAN HEADQUARTERS United Kingdom Grace Construction Products Ajax Avenue Slough Berkshire SL1 4BH Tel +44 (0) Fax +44 (0) Italy W. R. Grace Italiano S.p.A. Via Trento, Passirana di Rho Milano Tel Fax Visit our web site at Grace Construction Products Ltd Ajax Avenue Slough Berkshire SL1 4BH UK Tel +44 (0) Fax +44 (0) Adcor, Bituthene and Preprufe are registered trademarks of W R Grace & Co.-Conn. Advanced Bond Technology is a trademark of W R Grace & Co.-Conn. The information given is based on data and knowledge considered to be true and accurate and is offered for the user s consideration, investigation and verification. Since the conditions of use are beyond our control we do not warrant the results to be obtained. Please read all statements, recommendations or suggestions in conjunction with our conditions of sale including those limiting warranties and remedies which apply to all goods supplied by us. No statement, recommendation or suggestion is intended for any use which would violate or infringe statutory obligations or any rights belonging to a third party. Products included in this publication may be covered by patents. Copyright Grace Construction Products Limited. Printed in England Ref. PPBR001