PREPRUFE® Liquid Flashing Data Sheet

A Pre-Applied detailing bonded to poured concrete

 

Product Description

PREPRUFE® Liquid Flashing is a two-component elastomeric, cold applied, trowel grade material designed for use with PREPRUFE® waterproofing membranes in pre-applied waterproofing systems. The VOC (volatile organic compound) content is 3 grams per liter.
The two parts of PREPRUFE® Liquid Flashing are mixed on site and troweled on to provide a simple, quick, and fully bonded waterproofing detailing aid in conjunction with PREPRUFE® waterproofing systems.

Product Advantages

  • Bonds to poured concrete – Advanced Bond Technology™ maintains unique fully bonded performance
  • Liquid applied – conforms to irregular profiles
  • Cold applied – no flame hazard or special equipment needed
  • Waterproof – resistant to water pressure
  • Chemically cured – good through cure in thick applications
  • System compatible – complements PREPRUFE® waterproofing system
  • Reduced labor – simplifies detailing by reducing steps and materials

Use

PREPRUFE® Liquid Flashing is ideally suited for the following uses:

  • Fillet material around pipe or rebar penetrations
  • Sealing material at H-piles, columns, and terminations
  • Damage repair for PREPRUFE® surface

The two parts of PREPRUFE® Liquid Flashing are mixed on site and troweled on to provide a simple, quick, and fully bonded waterproofing detailing aid in conjunction with PREPRUFE® waterproofing systems.

Physical Properties

ModuleTypical ValueTest Method
Part A ColorBlue-
Part B ColorClear-
Mixture of Parts A and B ColorBlue-
Application Temperature25°F to 104°F-
Pot life45 minutes 
Elongation1000%ASTM D412
Low temperature flexibilityUnaffected at -20°F (-29°C)ASTM D1970
Crack cyclingPassASTM C1305
Resistance to hydrostatic head, functional details231 ft (71 m)ASTM D53851
Lateral Water Migration Resistance231 ft (71 m)ASTM D53852
Peel adhesion to post-cast concrete10 lbs/in. (1750 N/m)ASTM D9033
Peel Adhesion, Concrete10 lbs/in. (1750 N/m)ASTM D9034
Peel Strength, Steel10 lbs/in. (1750 N/m)ASTM D9034
Peel Strength, PVC10 lbs/in. (1750 N/m)ASTM D9034
Peel adhesion to PREPRUFE® Grout EG 7510 lbs/in. (1750 N/m)ASTM D9034
Peel adhesion to PREPRUFE® Plus membrane10 lbs/in. (1750 N/m)ASTM D18764
Peel adhesion to PREPRUFE® SCS membrane10 lbs/in. (1750 N/m)ASTM D18764
Peel adhesion to BITUTHENE® Liquid Membrane10 lbs/in. (1750 N/m)ASTM D18764
Environmental Stress ResistancePassASTM D1693
1. Test is performed by casting concrete against the membrane with detail prepared with PREPRUE® Liquid Flashing.
2. 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.
3. Sample is prepared by casting concrete against cured membrane.
4. Tested at crosshead speed of 2 inches per minute using Bituthene B2 LVC Primer over EG 75
 

Application Procedures

Safety, Storage and Handling Information

Safety Data Sheets (SDS) are available on request. Carefully read detailed precaution statements on product labels and the SDS before use.

Surface Preparation

Substrates should be dry and free from surface condensation or standing water. All surfaces should be clean and free from dust, dirt, site debris, grease and any other contaminants that may compromise adequate adhesion.
For concrete, prime with BITUTHENE® Adhesive Primer B2 LVC. For steel, rust and mill scale should be removed by wire brush or grinding, followed by solvent wipe. PVC surfaces should be wiped free of any debris.

Mixing and Installation

Add the entire contents of the Part B container to Part A and mix for 3 to 5 minutes using a low shear mixer until uniform, being careful to avoid trapping air in the mix. Part A is blue and Part B is clear. Take care to scrape material from the side and bottom of the containers to ensure thorough mixing. Do not apply any material if streaks or chunks can be seen due to insufficient mixing. Once mixed, PREPRUFE® Liquid Flashing must be applied by trowel within 45 minutes at 70°F. More time is available at lower temperatures. 

PREPRUFE® Liquid Flashing may be applied at temperatures of as low as 25°F (-5°C). During cold weather installation less than 40°F (5°C), product must be stored above 50°F (10°C) for a minimum of 24 hours prior to application to improve workability and overall product installation. At high temperatures, thickening and curing will be faster. Material that has thickened must be discarded. The material will cure to a slightly tacky, very flexible, rubber-like material.

PREPRUFE® Liquid Flashing must be applied at a target thickness of 80 mil minimum for optimized application performance. Use a wet film thickness gauge to ensure the minimum thickness has been achieved. In fillet applications, the face of the fillet should be a minimum of ¾ in. (20 mm). PREPRUFE® Liquid Flashing will adhere to primed concrete, steel, PVC, epoxy grout, and PREPRUFE® membranes.

PREPRUFE® Liquid Flashing will remain tacky. Prior to casting concrete inspect cured PREPRUFE® Liquid Flashing for adhered trash or contamination and remove where applicable. Excessive debris build up on the membrane should be washed clean. Light power washing will not damage the membrane. Normal construction site debris, dust, etc. will not compromise the fully bonded performance of the applied membrane. Ponding water should be removed prior to concrete pour. Follow QA/QC procedure as prescribed by GCP Technical Services applicable to below grade waterproofing products like but not limited to PREPRUFE® Liquid Flashing and BITUTHENE® Liquid Membrane. Do not install if rain is imminent. 3hrs after the application light rain does not compromise the performance of PREPRUFE® Liquid Flashing. Allow PREPRUFE® Liquid Flashing to cure for 24 hrs before concrete pour.

Coverage

As a fillet material, 1 gal (3.8 L) will cover approximately 100 linear feet (30 m). As a flashing material, 1 gal (3.8 L) will cover approximately 17 ft (1.6 m). As a fillet and reinforcement, 1 gal (3.8 L) will cover approximately 14 linear feet (4.3 m).

Damage Repair

Damaged PREPRUFE® Liquid Flashing can be repaired using PREPRUFE® Liquid Flashing. Fully or partially cured PREPRUFE® Liquid Flashing can be repaired using fresh PREPRUFE® Liquid Flashing which will bond very well to already applied PREPRUFE® Liquid Flashing. The PREPRUFE® Liquid Flashing that needs repairing needs to be cleaned of debris.
PREPRUFE® Liquid Flashing can be used to repair damaged surface of PREPRUFE® Plus membranes and punctures less than ½” diameter. Applied PREPRUFE®  Liquid Flashing for repair should extend beyond damaged membrane 4” in all directions. For punctures larger than ½” diameter, use PREPRUFE® Tape and/or PREPRUFE® membrane patch per standard application guidelines.

UV Protection

PREPRUFE® Liquid Flashing is not designed for permanently exposed applications, it should be covered within 56 days of application.

Equipment Cleaning

Clean tools and equipment with acetone before PREPRUFE® Liquid Flashing has cured. Acetone is a combustible liquid and should be used only in accordance with the manufacturer’s safety recommendations. Do not use solvents to clean hands or skin.

gcpat.com | North America Customer Service: +1 (877) 423 6491

This document is only current as of the last updated date stated below and is valid only for use in the United States. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on www.gcpat.com. Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

GCP, and PREPRUFE® are trademarks, which may be registered in the United States and/or other countries, of GCP Applied Technologies Inc. This trademark list has been compiled using available published information as of the publication date and may not accurately reflect current trademark ownership or status.

© Copyright 2023 GCP Applied Technologies Inc. All rights reserved.


GCP Applied Technologies Inc., 2325 Lakeview Parkway, Suite 400, Alpharetta, GA 30009, USA
GCP Canada, Inc., 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6
This document is only current as of the last updated date stated below and is valid only for use in the United States. It is important that you always refer to the currently available information at the URL below to provide the most current product information at the time of use. Additional literature such as Contractor Manuals, Technical Bulletins, Detail Drawings and detailing recommendations and other relevant documents are also available on www.gcpat.com. Information found on other websites must not be relied upon, as they may not be up-to-date or applicable to the conditions in your location and we do not accept any responsibility for their content. If there are any conflicts or if you need more information, please contact GCP Customer Service.

Last Updated: 2024-05-28

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