Pre-applied waterprooﬁng membranes that bond integrally to poured concrete for use below slabs or behind basement walls on conﬁned sites
GCP Applied Technologies (“GCP”) PREPRUFE® 300R Plus & 160R Plus pre-applied waterproofing membranes are unique composite sheets comprised of a thick HDPE ﬁlm, pressure sensitive adhesive, and weather resistant protective coating. Designed with Advanced Bond Technology™ and dual adhesive ZipLap™ seams, PREPRUFE® Plus membranes form a unique, integral bond to poured concrete. This integral bond is specifically designed to provide a robust barrier to water, moisture and gas and prevents both the ingress and lateral migration of water.
PREPRUFE® 300R Plus & 160R Plus membranes are release liner free and designed for eﬃcient, reliable installation. PREPRUFE® Plus ZipLap™ seams allow for an adhesive to adhesive bond at membrane sheet overlaps and deliver superior performance in harsh conditions without the need for specialized equipment, heat or power.
Ancillary Components (refer to the most current Data Sheets for all system components available on gcpat.com)
Limitations of Use
Safety and Handling
Users must read and understand the product label and Safety Data Sheets (SDS’s) for each system component before use. All users should acquaint themselves with this information prior to working with the material. Carefully read detailed precaution statements on the product labels and SDS’s before use. The most current SDS’s can be obtained from the GCP web site at gcpat.com or by contacting GCP toll free at 1-866-333-3SBM (3726).
Technical Support, Details and Technical Letters
The most up to date detail drawings and technical letters are available at gcpat.com. For complete application instructions, please refer to the current GCP Applied Technologies Contractor Handbook and Literature on (www.gcpat.com). Documents in hardcopy as well as information found on websites other than www.gcpat.com may be out of date or in error. Before using this product it is important that information be conﬁrmed by accessing www.gcpat.com and reviewing the most recent product information, including without limitation Product Data Sheets, Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations. Please review all materials prior to installation of PREPRUFE® 300R Plus & 160R Plus membranes.
Support is also available by full-time technically trained GCP Applied Technologies ﬁeld sales representatives and technical service personnel, backed by a central research and development technical services staﬀ. For technical assistance with detailing and problem solving please call toll-free at (866) 333-3SBM (3726).
All surfaces – It is essential to create a sound and solid substrate to eliminate movement during the concrete pour. Substrates must be regular and smooth with no gaps or voids greater than 0.5 in. (12 mm). Grout around all penetrations such as utility conduits, etc. for stability.
Horizontal – The substrate must be free of loose aggregate and sharp protrusions. Avoid curved or rounded substrates. When installing over earth or crushed stone, ensure substrate is well compacted to avoid displacement of substrate due to traﬃc or concrete pour. The surface does not need to be dry, but standing water must be removed.
Vertical – Use concrete, plywood, insulation or other approved facing to sheet piling to provide support to the membrane. Board systems such as timber lagging must be close butted to provide support and not more than 0.5 in. (12 mm) out of alignment. HYDRODUCT® 200 or 220 drainage sheet can be used to bridge voids, gaps and out of alignment up to 50mm prior to PREPRUFE® membrane installation.
PREPRUFE® 300R Plus and 160R Plus membranes have colored zip strips at the top and bottom of the seam area on the edge of the roll. Both zip strips cover an aggressive adhesive. Once the green zip strip on the top of the membrane and the blue zip strip on the bottom of the membrane are removed, a strong adhesive to adhesive bond is achieved in the overlap area. This PREPRUFE® ZipLap™ provides an enhanced sealing of the overlaps in harsh conditions combined with a fast and easy way of execution without specialized equipment, heat or power.
Horizontal substrates – (PREPRUFE® 300R Plus membrane only)
PREPRUFE® 300R Plus membrane can be applied in horizontal applications to smooth prepared concrete, carton forms or well rolled and compacted earth or crushed stone substrate. Kick out or roll out the membrane HDPE ﬁlm side to the substrate with the green zip strip facing towards the concrete pour. End laps should be staggered to avoid a buildup of layers. Leave green and blue zip strips on the membrane until overlap procedure is completed. When completed remove release liner. When installing over carton forms, contact your local GCP representative.
Accurately position succeeding sheets to overlap the previous sheet 3 in. (75 mm) along the marked selvedge with the blue zip strip on top of the green zip strip. Ensure the underside of the succeeding sheet is clean, dry and free from contamination before attempting to overlap. Peel back and remove both the green and blue zip strips in the overlap area to achieve an adhesive to adhesive bond at the overlap. Ensure a continuous bond is achieved without creases and roll ﬁrmly with a heavy roller.
Vertical substrates –
PREPRUFE® 300R Plus & 160R Plus membranes can be applied vertically to permanent formwork or adjoining structures. Mechanically fasten the membrane vertically using fasteners appropriate for the substrate with the green zip strip facing towards the concrete pour. The membrane may be installed in any convenient length. Fastening can be made through the selvedge within 0.5 in. from the leading edge of the membrane using a small low proﬁle head fastener so that the membrane lays ﬂat and allows ﬁrmly rolled overlaps. Accurately position each succeeding sheet to overlap the previous sheet 3 in. (75 mm) along the marked selvedge with the blue zip strip on top of the green zip strip.
Ensure the underside of the succeeding sheet is clean, dry and free from contamination before attempting to overlap. Peel back and remove both the green and blue zip strips in the overlap area to achieve an adhesive to adhesive bond at the overlap. Roll ﬁrmly to ensure a watertight seal.
Note that PREPRUFE® 300R & 160R membranes should not be used with conventional two-sided formwork. (See PREPRUFE® Technical Letter # 13 Forming Systems For Use with PREPRUFE® Membranes)
Roll ends and cut edges –
Overlap all roll ends and cut edges by a minimum 3 in. (75 mm) and ensure the area is clean and free from contamination, wiping with a damp cloth if necessary. Allow surface to dry and apply PREPRUFE® Tape LT (or HC in hot climates) centered over the lap edges and roll ﬁrmly. Immediately remove tinted plastic release liner from the tape.
Inspect the membrane before installation of reinforcement steel, formwork and ﬁnal placement of concrete. The membrane can be easily cleaned by power washing if required. Repair damage by wiping the area with a damp cloth to ensure the area is clean and free from dust, and other contaminants and allow the membrane to dry. Repair small punctures and slices (0.5 in. (12 mm) or less by applying PREPRUFE® Tape centered over the damaged area. Repair punctures and holes larger than 0.5 in. (12mm) by applying a patch of PREPRUFE® membrane. Extend the patch 6 in. (150 mm) beyond the damaged area. Seal all edges of the patch with PREPRUFE® Tape. Where exposed selvedge has lost adhesion or laps have not been sealed, ensure the area is clean and dry and cover with fresh PREPRUFE® Tape. Any areas of damaged adhesive should be covered with PREPRUFE® Tape. All PREPRUFE® Tape must be rolled ﬁrmly and the tinted release liner removed.
Slices or relief cuts can be butted or overlapped and repaired by applying PREPRUFE® Tape centered over the edge of the overlap or center of the butt joint. Where it is not possible to create a butt joint or overlap, repair with fresh membrane and PREPRUFE® Tape as detailed above.
Pouring of Concrete
Prior to placing concrete ensure the plastic release liner is removed from all areas of PREPRUFE® membranes and PREPRUFE® tape. The PREPRUFE® membrane surface must be free of contaminants, dirt and debris and all standing water prior to placement of the concrete.
It is required that concrete be poured within 56 days (42 days in hot climates) of placement of the membrane. Following proper ACI guidelines, concrete must be placed carefully and consolidated properly to avoid damage to the membrane. Never use a sharp object to consolidate the concrete. Provide temporary protection from concrete splash over for areas of the PREPRUFE® membrane that are adjacent to the concrete pour.
Removal of Formwork
A minimum concrete compressive strength of 3000 psi (20 N/mm2) is required prior to stripping formwork supporting PREPRUFE® membranes. Premature stripping may result in displacement of the membrane and/or spalling of the concrete. (see PREPRUFE® Technical Letter #17 Removal of Formwork Placed against PREPRUFE® membranes)
After removal of the formwork and prior to backﬁlling, all exposed PREPRUFE® membrane must be protected from damage with an approved protective course
|DIMENSIONS (NOMINAL)||PREPRUFE® 300R PLUS MEMBRANE||PREPRUFE® 160R PLUS MEMBRANE|
|Roll size Note#1||3 ft. 10 in. x 102 ft. (1.17m x 31.15m)||3 ft. 10 in. x 120 ft. (1.17m x 36.6m)|
|Roll weight||108 lbs (49 kg)||92 lbs (42 kg)|
|Note: when calculating coverage account for the Minimum side/end laps||3 in. (75 mm)||3 in. (75 mm)|
Note#1 Individual roll length may vary +/-1%
|PROPERTY||TYPICAL VALUE PREPRUFE® 300R PLUS||TYPICAL VALUE PREPRUFE® 160R PLUS||TEST METHOD|
|Thickness||0.046 in. (1.2 mm)||0.032 in. (0.8 mm)||ASTM D3767|
|Lateral Water Migration Resistance||Pass at 231 ft (71 m) of hydrostatic head pressure||Pass at 231 ft (71 m) of hydrostatic head pressure||ASTM D53851|
|Low temperature flexibility||Unaffected at -20°F (-29°C)||Unaffected at -20°F (-29°C)||ASTM D1970|
|Resistance to hydrostatic head||231 ft (71 m)||231 ft (71 m)||ASTM D53852|
|Tensile strength, film||4000 psi (27.6 MPa)||4000 psi (27.6 MPa)||ASTM D412|
|Crack cycling at -9.4°F (-23°C), 100 cycles||Unaffected, Pass||Unaffected, Pass||ASTM C8364|
|Puncture resistance||200 lbs (890 N)||100 lbs (445 N)||ASTM E154|
|Peel adhesion to concrete||5 lbs/in. (880 N/m)||5 lbs/in. (880 N/m)||ASTM D9035|
|Lap peel adhesion||8 lbs/in. (1408 N/m)||8 lbs/in. (1408 N/m)||ASTM D18766|
|Permeance to water vapor transmission||0.01 perms (0.6 ng/(Pa x s x m2))||0.01 perms (0.6 ng/(Pa x s x m2))||ASTM E96, method B|
1. Lateral water migration resistance is tested by casting concrete against membrane with a hole and subjecting the membrane to hydrostatic head pressure with water. The test measures the resistance of lateral water migration between the concrete and the membrane.
2. Hydrostatic head tests of PREPRUFE® Membranes are performed by casting concrete against the membrane with a lap. Before the concrete cures, a 0.125 in. (3 mm) spacer is inserted perpendicular to
membrane to create a gap. The cured block is placed in a chamber where water is introduced to the membrane surface up to the head indicated.
3. Elongation of membrane is run at a rate of 2 in. (50 mm) per minute.
4. Concrete is cast against the PREPRUFE® membrane and allowed to cure (7 days minimum).
5. Concrete is cast against the protective coating surface of the membrane and allowed to properly dry (7 days minimum). Peel adhesion of membrane to concrete is measured at a rate of 2 in. (50 mm) per minute at room temperature.
6. The test is conducted 15 minutes after the lap is formed and run at a rate of 2 in. (50 mm) per minute at 72°F (22°C).
Source – GCP Applied Technologies