Quick drying, all temperature primer to enable same hour application of Bituthene membranes


BITUTHENE® Primer B1 is a solvent-based bituminous primer used to prepare vertical and sloping surfaces and suspended slabs, for BITUTHENE® GP, BITUTHENE® MRX and BITUTHENE® HC grade membrane application.


  • All temperatures above +5 °C
  • Compatible with BITUTHENE® GP, BITUTHENE® MRX and BITUTHENE® HC grade membranes
  • High coverage - low cost per square metre


This primer cannot be use to prime “green” concrete or damp to touch substrates and need dry substrates. It is suitable for use on masonry or wood surfaces. Primer B1 can be used at -5 °C or above.


BITUTHENE® Primer B1 may be applied by a roller or a brush. Apply it to clean, dirt free, surfaces at a coverage rate of 8-10 m2 per litre. Allow the primer to dry 30 minutes or until tack-free. Dry time may be longer in cold temperatures. Deep puddles of primers should be avoided as this will lengthen drying time. Do not apply directly to BITUTHENE® membrane.

In general, priming should be limited to an area that can be covered with membrane on the same day. Areas that accumulate significant amounts of dust or dirt must be re-primed before membrane is applied.

Key Data

VOC 473 g/l
Curing at 20 °C 30 minutes


BITUTHENE® Primer B1 5 & 25 litre can
Coverage 8-10 m2 per litre*

* Depending upon method of application, surface porosity and ambient temperature
All declared values shown in this data sheet are based on test results determined under laboratory conditions and with the product sample taken directly from stock in its original packing without any alteration or modification of its component parts.

Health and Safety

BITUTHENE® Primer B1 must be handled properly and stored in a well ventilated place. Read the product label and Safety Data Sheet (SDS) before use. Users must comply with all risk and safety phrases. SDS’s can be obtained from GCP Applied Technologies or from our website at | United Arab Emirates customer service: +971 4 5139560

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 trademark, 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 2018 GCP Applied Technologies Inc. All rights reserved.

GCP Applied Technologies Inc., 2325 Lakeview Parkway, Alpharetta, GA 30009, USA
P. O. Box 5006, Office 2104, 21 Floor, The Exchange Tower, Opp. JW Marriott Marquis Hotel, Business Bay, Dubai – United Arab Emirates
This document is only current as of the last updated date stated below and is valid only for use in the UAE. 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 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: 2022-11-18