Product Description
BITUTHENE® HRA NEOPRENE is an uncured neoprene rubber membrane designed to reinforce wall, base flashings, expansion joints and other details in hot rubberized asphalt waterproofing systems.
For other HRA system products see the individual product data sheets
Product Details
BITUTHENE HRA NEOPRENE is a thermoset neoprene rubber membrane used in conjunction with BITUTHENE HRA. BITUTHENE HRA NEOPRENE is an uncured sheet material that is easy to mold around penetrations and can be used to detail flashings, drains, transitions, irregular shapes, and expansion joints. It has excellent tensile and elongation strength and can easily withstand thermal expansion and contraction. BITUTHENE HRA NEOPRENE is typically placed within BITUTHENE HRA but can be used as a protection course in certain approved exposed conditions.
| Roll Dimensions | 6” x 100’ 12” x 100’ |
| Standard Thickness | 60 mils (1.5mm) |
| Approximate Weight | 6” / 20lb, 12” / 40lb |
| Shelf life | maximum 9 months from the date of manufacturing |
System Components
BITUTHENE® HRA – Hot Rubber Membrane
BITUTHENE® HRA FABRIC– Polyester Reinforcement
BITUTHENE® HRA NEOPRENE 12” x 100’ – Neoprene for Flashing
BITUTHENE® HRA NEOPRENE 6” x 100’ – Neoprene for Flashing
BITUTHENE® HRA PROTECTION G – Fiberglass Protection Sheet
BITUTHENE® HRA PROTECTION P – Polyester Protection Sheet
BITUTHENE® ADHESIVE PRIMER B2 LVC - Primer
BITUTHENE® HRA CAP – Cap Sheet for Wall Flashing
For other BITUTHENE HRA products details, see the individual product data sheet.
Safety & Handling
BITUTHENE® products must be handled properly. Do not handle until all safety precautions and instructions have been read and understood. Refer to product label and SDS before use. SDSs can be obtained from www.gcpat.com or by contacting your local representative.
STORAGE & USE
Rolls should be stored upright off the ground and completely protected from the weather. Do not attempt application if ice, snow, moisture, or dew are present or inclement weather is expected. Do not use material that is 9 months old or has become inflexible and hard to mold.
APPLICATION
Remove green protective film from top of BITUTHENE HRA NEOPRENE prior to application of membrane. Apply BITUTHENE HRA at 90 mils (2.3 mm) and while hot install the BITUTHENE HRA NEOPRENE. Mold to shape as needed to flash transitions. A minimum 2” (50.8 mm) overlap is required between sections of neoprene. BITUTHENE HRA must be applied between membrane overlaps to completely seal the joints. Cover the neoprene with additional BITUTHENE HRA at about 125 mils (3.2 mm) to fully encapsulate it within the hot rubber.
Cold weather applications require special handling to prevent damage to the rolls and ensure satisfactory installation. Do not apply waterproofing systems over improperly prepared substrates or substrates that contain moisture. Rubberized asphalt temperature in the melter must be 380°-400°F (193°-204°C) to ensure proper adhesion.
Typical PROPERTIES after vulcanization
| Test Description | Test Method | Results* |
| Tensile Strength | D412 Die C | 1484 PSI |
| Elongation | D412 Die C | 267% |
| Tear Resistance | D412 Die C | 171 Lb./in |
| Brittleness Point @ - 40°F | D2137 | Does not Break |
| Ozone Resistance | No Cracks @ 7 X | |
| 168 Hrs./100pphm/104°F/50% Ext. | D1149 | Magnification |
| Water Absorption, Max. Mass 166 Hrs. @ 158°F | D471 | 8.50% |
TECHNICAL ASSISTANCE & SERVICES
GCP provides technical assistance in the product selection, specification, and application guidelines for all GCP HRA systems. Field representatives are available for consultation in each region.
For more information, contact GCP Technical Services
gcpat.com | North America Customer Service: +1 (877) 423 6491
We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate, and is offered for consideration, investigation and verification by the user, but we do not warrant the results to be obtained. Please read all statements, recommendations, and suggestions in conjunction with our conditions of sale, which apply to all goods supplied by us. No statement, recommendation, or suggestion is intended for any use that would infringe any patent, copyright, or other third party right.
BITUTHENE is a 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 sta
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: 2025-05-30
https://gcpat.com/en/solutions/products/bituthene-hra-waterproofing-system/bituthene-hra-neoprene-data-sheet