Introduction
Grace Bituthene 3000 is a high-performance, self-adhesive rubberized asphalt/polyethylene waterproofing membrane designed for both elevated and below-grade applications. Ideal for use in concrete decks, plaza areas, parking decks, and subterranean structures, this material offers a combination of flexibility, durability, and chemical resistance. It is manufactured by GCP Applied Technologies and is engineered to adhere to cured concrete surfaces, providing a reliable barrier against water, moisture, and gases.
The product is available in two variants: Bituthene 3000 for standard temperature applications and Bituthene Low Temperature for use in colder conditions. Both variants are supplied in rolls and must be applied under specific temperature and surface conditions to ensure optimal performance. The installation process involves careful surface preparation, the use of appropriate primers, and precise overlap and adhesion techniques to maintain continuity.
This article provides a detailed overview of the installation procedures, application guidelines, and technical considerations for using Bituthene 3000 in waterproofing projects. It draws exclusively from official documentation provided by GCP Applied Technologies, ensuring the accuracy and reliability of the information presented.
Key Features and Technical Specifications
Bituthene 3000 is a factory-made sheet membrane with a consistent thickness of 1/16 inch (1.5 mm), a width of 3 feet (0.9 m), and a length of 66.7 feet (20 m). It is constructed using a cross-laminated high-density polyethylene (HDPE) carrier film combined with a self-adhesive rubberized asphalt compound. This design provides dimensional stability, high tear strength, and resistance to punctures and impacts.
The membrane is cold-applied, eliminating the need for open flames during installation, and is chemically resistant to aggressive soils and groundwater. It is also highly flexible, with an elongation capacity of over 300%, allowing it to accommodate minor structural movements such as shrinkage and settlement.
For ease of installation, especially in detailed areas, Bituthene 3000 features a RIPCORD® integrated filament split release system. This allows the release paper to be split on demand, improving the precision and efficiency of membrane placement. The controlled thickness of the factory-produced sheet ensures consistent performance across different project sites.
Surface Preparation and Priming
Before applying Bituthene 3000, the surface must be properly prepared to ensure optimal adhesion and long-term performance. The following steps are essential for effective surface preparation:
- Structural Integrity: The surface must be structurally sound, free of voids, spalled areas, loose aggregate, and sharp protrusions.
- Contaminants: Remove grease, oil, wax, dust, dirt, loose stone, and debris from all exposed surfaces.
- Concrete Curing: Concrete must be fully cured. Normal structural concrete should be cured for a minimum of 7 days, while lightweight structural concrete requires 14 days of curing. For horizontal applications over non-vented decks, double the curing time.
- Moisture Conditions: The surface must be dry to the touch. In certain conditions, such as unusually wet weather or late form removal, extended drying times may be necessary.
Priming is a critical step in the application process. Bituthene 3000 is compatible with several primer types, each with specific application guidelines:
- Bituthene Primer WP-3000: Applied via spray or roller at a coverage rate of 500–600 ft²/gal (12–15 m²/L). It should be applied in dry weather above 40°F (5°C) and allowed to dry for one hour or until the concrete returns to its original color.
- Bituthene Primer B2: Applied using a lamb’s wool roller at a coverage rate of 250–350 ft²/gal (6–8 m²/L). It should be applied in dry weather above 25°F (–4°C) and allowed to dry for one hour or until tack-free.
- Bituthene Primer B2 LVC: A low-VOC primer applied using a lamb’s wool roller at a coverage rate of 325–425 ft²/gal (7.5–10.0 m²/L). It should be applied in dry weather above 25°F (–4°C) and allowed to dry for one hour or until tack-free.
If the primed surface becomes contaminated with dust or debris, it should be re-primed before membrane application. In dusty environments, the membrane should be applied as soon as the primer is dry to prevent contamination.
Application Conditions and Environmental Considerations
Bituthene 3000 must be applied under specific temperature and weather conditions to ensure proper adhesion and performance:
- Weather Conditions: The membrane should only be applied in dry weather.
- Ambient and Surface Temperatures:
- Bituthene 3000 membrane should be applied when ambient and surface temperatures are at or above 40°F (5°C).
- Bituthene Low Temperature membrane is suitable for use when ambient and surface temperatures are between 25°F (–4°C) and 60°F (16°C).
- Primer Application Temperatures:
- Bituthene Primer WP-3000 should be applied in dry weather above 40°F (5°C).
- Bituthene Primer B2 and B2 LVC should be applied in dry weather above 25°F (–4°C).
Failure to adhere to these temperature guidelines can result in poor adhesion, reduced performance, and potential failure of the waterproofing system.
Installation Process and Overlapping Techniques
The installation of Bituthene 3000 involves unrolling the membrane with the adhesive side down onto the primed surface. The following steps should be followed:
- Unrolling the Membrane: Carefully unroll the membrane roll to avoid kinking or tearing. The membrane should be unrolled sticky side down onto the primed surface.
- Overlap Requirements: To ensure continuity, a minimum overlap of 2 inches (50 mm) is required. The overlapping joint must be firmly rolled to ensure proper adhesion.
- Rolling and Compaction: After unrolling, the membrane must be firmly rolled using a suitable roller to eliminate air pockets and ensure full contact with the surface.
- Detailing and Complex Areas: In areas with complex geometries, the RIPCORD® split release system can be used to split the release paper on demand, allowing for precise membrane positioning.
Bituthene 3000 is capable of bridging shrinkage cracks in concrete and can accommodate minor differential movement throughout the service life of the structure. However, for large or active cracks, additional measures such as the use of Bituthene Deck Prep as a leveling agent may be necessary.
Ancillary Components and System Integration
Bituthene 3000 is part of a comprehensive waterproofing system that includes several ancillary components. These components are designed to enhance the performance, durability, and ease of installation of the membrane system:
- BITUTHENE® Primer Adhesive B2 LVC: A low-VOC, solvent-based primer that enhances adhesion between the membrane and the concrete surface.
- BITUTHENE® Liquid Membrane: A two-component, elastomeric, liquid-applied detailing compound used for sealing joints and complex details.
- BITUTHENE® Mastic: A rubberized asphalt-based mastic used for sealing and repairing the membrane.
- PREPRUFE® Detail Tape: A double-sided, self-adhesive tape used for sealing and reinforcing membrane edges and joints.
- HYDRODUCT® Drainage Sheet: A high-impact and creep-resistant geocomposite used as a drainage and protection layer.
These components should be used in accordance with the latest product data sheets available on the manufacturer’s website. The system components are intended to work together to provide a continuous, durable, and long-lasting waterproofing solution.
Storage and Handling Guidelines
Proper storage and handling of Bituthene 3000 are essential to maintain product integrity and ensure safe and effective installation. The following guidelines should be followed:
- Storage Conditions:
- Store the material in dry conditions between 40°F (4.5°C) and 90°F (32°C).
- Store the rolls off the ground, under tarps, or otherwise protected from rain and ground moisture.
- Refer to Technical Letter #TL-0030 for detailed shelf life and storage information.
- Handling Precautions:
- Vapors from solvent-based primers and mastics are harmful and flammable.
- Material Safety Data Sheets (MSDS) are available at graceconstruction.com and should be reviewed before use.
- Carefully read all precautionary statements on product labels and MSDS before installation.
Proper handling and storage not only ensure the safety of the installation team but also protect the quality and performance of the product.
Technical Support and Documentation
GCP Applied Technologies provides extensive technical support and documentation to ensure the correct application of Bituthene 3000. The following resources are available to users:
- Technical Letters and Detail Drawings: The most up-to-date technical letters and detail drawings can be accessed at gcpat.com.
- Contractor Handbook and Literature: For complete application instructions, refer to the current GCP Applied Technologies Contractor Handbook and Literature available on the manufacturer’s website.
- Technical Assistance: For assistance with detailing and problem-solving, contact the manufacturer’s technical support team at (866) 333-3SBM (3726).
It is important to note that documents available in hardcopy or on third-party websites may be outdated or incorrect. Users should always confirm the most recent product information by visiting gcpat.com and reviewing the latest data sheets, technical bulletins, and detail drawings.
Limitations of Use
Bituthene 3000 is approved for use in the applications specifically outlined in the product data sheets and other current technical documents available on gcpat.com. The following limitations should be considered:
- Temperature Limitations: Bituthene 3000 is suitable for use in structures where in-service temperatures do not exceed 130°F (54°C).
- Approved Applications: The product is approved for use in elevated plaza and parking decks, below-grade basements, tunnels, and other subterranean applications.
- Rehabilitation and New Construction: Bituthene 3000 can be used in both new construction and rehabilitation projects. For leveling and non-structural repair, Bituthene Deck Prep may be used in conjunction with the membrane.
Users should ensure that their intended application is within the approved uses specified in the product documentation.
Safety and Environmental Considerations
The use of Bituthene 3000 and its associated primers and ancillary components involves certain safety and environmental considerations:
- Harmful Vapors: Vapors from solvent-based primers and mastics are harmful and flammable. Appropriate personal protective equipment (PPE) should be worn during application, and work areas should be well-ventilated.
- Material Safety Data Sheets (MSDS): Users should acquaint themselves with the information provided in the MSDS for each product. These documents outline safe handling procedures, storage requirements, and health and environmental considerations.
- Environmental Impact: The use of low-VOC primers such as Bituthene Primer B2 LVC helps reduce environmental impact. However, all products should be disposed of in accordance with local regulations and manufacturer guidelines.
By following the recommended safety and environmental practices, users can ensure the safe and responsible use of Bituthene 3000 in their waterproofing projects.
Conclusion
Grace Bituthene 3000 is a high-performance, cold-applied waterproofing membrane designed for both elevated and below-grade applications. Its self-adhesive properties, chemical resistance, and flexibility make it an ideal solution for concrete decks, plaza areas, parking decks, and subterranean structures. The product is available in two variants—Bituthene 3000 for standard temperature applications and Bituthene Low Temperature for use in colder conditions.
Proper surface preparation, priming, and installation techniques are essential for ensuring the long-term performance of the membrane. The use of ancillary components such as primers, liquid membranes, mastics, and drainage sheets enhances the durability and effectiveness of the waterproofing system. Users should follow the recommended application conditions, storage guidelines, and safety precautions to achieve optimal results.
For detailed information and technical support, users are encouraged to consult the latest product data sheets, technical letters, and detail drawings available on the manufacturer’s website. By adhering to the specified installation procedures and guidelines, users can ensure the successful application of Bituthene 3000 in their waterproofing projects.