Traitement de surface à faible viscosité utilisé pour niveler et réparer les plate-formes de béton brut avant d'installer l'imperméabilisant Bituthene

Product Description

BITUTHENE® Deck Prep is a low viscosity, two component, asphalt-modified urethane coating. It is used to level and repair rough concrete decks to which BITUTHENE® waterproofing membranes will be applied. The VOC (Volatile Organic Compound) content is 10 g/L.

Architectural and industrial maintenance regulations limit the VOC content in products classified as architectural coatings. Refer to Technical Letters at for the most current list of allowable limits.

Product Advantages

  • Flexible—cures to rubber-like coating
  • Low viscosity—easy to use, self leveling compound
  • Fully adhered—seals to concrete substrate to provide temporary waterproofing layer
  • No primer necessary—apply directly to dry, unprimed concrete


BITUTHENE® Deck Prep is ideally suited as a:

  • Leveling agent for rough concrete decks for new and rehab construction
  • Non-structural repair material for defects in concrete decks for new and rehab construction
  • Temporary waterproofing layer
  • Primer layer for BITUTHENE® waterproofing membranes


BITUTHENE® Deck Prep is completely compatible with all other BITUTHENE® products and with existing asphalt or coal tar-based waterproofing materials. It is also compatible with cured silicone and polyurethane sealants. It is not compatible with creosote, pentachlorophenol, linseed oil or polysulfide-based sealants. For further compatibility qualifications consult BITUTHENE® Technical Letters 4 and 10.


Clean tools and equipment with mineral spirits before BITUTHENE® Deck Prep has cured. Mineral spirits 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.

Application Procedures

Safety, Storage and Handling Information

BITUTHENE® products must be handled properly. Vapors from solventbased primers and mastic are harmful and flammable. Protection Board Adhesive is extremely flammable. For these products, the best available information on safe handling, storage, personal protection, health and environmental considerations has been gathered. SDS (Safety Data Sheet) are available at and users should acquaint themselves with this information. Carefully read detailed precaution statements on product labels and the SDS before use.

Surface Preparation

All surfaces must be dry and free from dirt, grease, oil, dust or other contaminants. BITUTHENE® Deck Prep may be applied at temperatures of 25 °F (-4 °C) or above. Below 40 °F (5 °C), store in a warm place before application.


Add the entire contents of the Part B container to Part A and mix for 3 to 5 minutes until uniform. Part A is black and Part B is clear. Take care to scrape material from the side and bottom of the containers to ensure thorough mixing. A low speed (150 rpm) mechanical mixer with flat paddle blades is required. Do not apply any material if streaks can be seen due to insufficient mixing.

Once mixed, BITUTHENE® Deck Prep should be poured directly onto the deck and spread with a squeegee over all areas that are to be waterproofed with BITUTHENE® waterproofing membranes. Apply BITUTHENE® Deck Prep within one hour afer mixing. More time may be available at lower temperatures, however, at high temperatures thickening and curing may be faster. Material that has cured should be discarded.

BITUTHENE® Deck Prep should be applied in suffcient thickness to smooth all rough areas and fill all voids. The coverage rate is approximately 25 f2/gal (0.6 m2/L) at 1⁄16 in. (1.5 mm) thickness. 16 On very rough surfaces, the coverage could be lower. Apply material in thicknesses not to exceed ½ in. (13 mm) per coat. BITUTHENE® Deck Prep will adhere to dry, unprimed concrete.

The product will support light foot traffic after an overnight cure. For interior applications, it may remain tacky even after fully cured.

Apply BITUTHENE® waterproofing membranes directly to cured BITUTHENE® Deck Prep. No priming or conditioning is necessary.


Unit size 4 gal (15.1 L)
Weight per unit 44 lbs (20 kg)
Units per pallet 24

Physical Properties

Part A Color Black  
Part B Color Clear  
Mixture of Parts A and B Color Black  
Solids content 100% ASTM D1644
Elongation 250% minimum ASTM D412
Peel strength 5 lbs/in. (880 N/m) minimum ASTM D903
Flexibility, 180° bend over 1 in.
T(25 mm) mandrel at -25 °F (-32 °C)
Unaffected ASTM D1970 | North America customer service: 1-877-4AD-MIX (1-877-423-6491)

Nous espérons que les renseignements ci-dessus s’avéreront utiles. Ces renseignements sont basés sur des données et des connaissances jugées véridiques et exactes. Ils sont soumis pour considération, étude et vérification, mais nous ne garantissons aucunement les résultats obtenus. Lire toutes les déclarations, recommandations, suggestions et conditions de vente relatives aux produits que nous fournissons. Aucune déclaration, recommandation ou suggestion ne doit être interprétée comme une incitation à commettre une contrefaçon de brevet quelconque.

Bituthene, Deck Prep, Ripcord, Preprufe et Hydroduct sont des marques déposées qui peuvent être enregistrées aux États-Unis et dans d'autres pays, de GCP Applied Technologies Inc. Cette liste de marques a été établie à l'aide des informations publiées disponibles à la date de publication et peut ne pas refléter fidèlement la propriété ou le statut actuel de la marque.

© Copyright 2017 GCP Applied Technologies Inc. All rights reserved.

GCP Applied Technologies Inc., 62, avenue Whittemore, Cambridge, MA 02140, États-Unis.

Au Canada, 294 Clements Road, West, Ajax, Ontario, Canada L1S 3C6.

GCP Applied Technologies Inc., 2325 Lakeview Parkway, Suite 450, 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 Canada. 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: 2023-06-29