PREPRUFE® SC1 Primer (UK/IE Version)

Non-bituminous, quick drying, damp and green concrete tolerant , solvent based primer for use with PREPRUFE® 800PA cold applied, self adhesive waterproof membrane

Product Description

PREPRUFE® SC1 primer is a green coloured, non-bituminous, solvent based primer, which provides superior adhesion of PREPRUFE® 800PA non-bituminous adhesive membrane to a wide variety of substrates.

Typical Use

Used to prime concrete surfaces including ‘green’ or damp to touch, as well as wood surfaces to which PREPRUFE® 800PA membrane will be applied. PREPRUFE® SC1 primer can be used on vertical and horizontal foundation applications at -5°C or above.


  • Quick drying - fast membrane application. 
  • Damp and green concrete tolerant.
  • Active formulation for enhanced membrane adhesion. Specifically formulated to be compatible with PREPRUFE® 800PA membrane.
  • Green colour to ensure proper coverage, to aid identification, and to avoid substitution.

This document is applicable to projects and applications in the UK only. Please refer to the local website for further information or contact your GCP representative. 

System Components

Surface Primer

PREPRUFE® SC1 primer is a companion product that is specifically designed to provide high bond of PREPRUFE® 800PA waterproofing membrane.

Limitations of Use

PREPRUFE® SC1 primer is not intended for any other use other than those specifically detailed in this product data sheet and any other current product data sheets available at Contact GCP Technical Services where any other use is anticipated or intended.

Note that because of local regulations, test standards and customs, product literature and offerings may be different in various locations.  If you have any questions or comments, please contact your local customer service at  or +44 (0) 1480 478421.

Safety and Handling Information

Users must read and understand the product label and safety data sheet (SDS) for each system component. All users should acquaint themselves with this information prior to working with the products and follow the precautionary statements. SDSs can be obtained by contacting your local GCP representative or office, by calling GCP at +44 (0) 1480 478421 and in some cases from our web site at


  • All products must be handled and stored consistent with current related GCP methods statement and current Safety Data Sheets
  • All PREPRUFE® SC1 primer must be stored upright in its original container in a well ventilated place. 
  • Observe shelf life

Technical Support, Details and Technical Letters

The most up to date detail drawings and technical letters are available at For complete application instructions, please refer to the current GCP Applied Technologies Contractor Handbook and Literature on ( Documents in hardcopy as well as information found on websites other than may be out of date or in error. Before using this product, it is important that information be confirmed by accessing and reviewing the most recent product information, including without limitation product data sheets and contractor manuals, technical bulletins, detail drawings and detailing recommendations. Please review all materials prior to installation of PREPRUFE® SC1 primer. For technical assistance with detailing and problem solving please contact your local GCP representative or, by calling GCP at +44 (0) 1480 478421. 


PREPRUFE® SC1 primer may be applied by a roller or brush. Apply to clean, dirt free, frost-free surfaces at a coverage rate of 10-12 m2 per litre. Allow the primer to dry 30 minutes or until tack-free. Dry time may be longer in cold temperatures. Puddles of primer should be avoided as this will lengthen drying time. Do not apply directly to PREPRUFE® 800PA membrane. Priming should be limited to an area that can be covered with membrane within the same day. Areas that accumulate significant amounts of dust or dirt must be re-primed before membrane is applied.

PREPRUFE® SC1 primer 5 & 20 litre can
Coverage 10-12 sq m per litre*
* Depending upon method of application, surface porosity and ambient temperature.


Typical Properties
Property Typical Value
Colour Green
VOC 592 g/L
Curing at 20°C 30 minutes

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. | United Kingdom customer service: +44 (0) 1480 478421

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.

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 2020 GCP Applied Technologies Inc. All rights reserved.
GCP Applied Technologies Inc., 62 Whittemore Avenue, Cambridge, MA 02140 USA.
GCP Applied Technologies (UK) Limited, 487-488 Ipswich Road, Slough, Berkshire, SL1 4EP, UK.

This document is only current as of the last updated date stated below and is valid only for use in the United Kingdom. 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: 2021-02-05