Bituthene Low Temprature

Advantages

• Waterproof—high hydrostatic head resistance
• Gas resistant - methane, carbon dioxide and radon gas protection in excess of the standard membrane requirements in BRE Reports 211 (radon) and 212 (methane and carbon dioxide).
• Cross laminated film - Cross laminated film—provides dimensional stability, high tear strength, puncture and impact resistance
• Cold applied -no flame hazard; self-adhesive overlaps ensure continuity
• Flexible—accommodates minor settlement and shrinkage movement
• Controlled thickness - factory-made sheet ensures constant, non-variable site application.
• Wide application window—
• Bituthene® Low Temperature surface and ambient temperatures between 25°F (-4°C) and 60°F (16°C)
• New or rehab constructionuse with Bituthene Deck Prep® as a leveling agent and non-structural repair material
• Ripcord®—this split release on demand feature allows the splitting of the release paper into two pieces for ease of installation in detailed areas

Use
Bituthene is ideal for waterproofing concrete decks where in-service temperatures will not exceed 130°F (54°C). It can be applied to split slab construction, such as in plaza areas and parking decks. Interior uses may include mechanical rooms, laboratories, kitchens and bathrooms. (For below grade applications, see Below Grade Waterproofing Bituthene 3000 and Bituthene Low Temperature.) Bituthene is 1/16 in. (1.5 mm) thick, 3 ft (0.9 m) wide and 66.7 ft (20 m) long and is supplied in rolls. It is unrolled sticky side down onto concrete slabs primed with Bituthene Primer WP-3000, Bituthene Primer B2 or Bituthene Primer B2 LVC. Continuity is achieved by overlapping a minimum 2 in. (50 mm) and firmly rolling the joint. Bituthene is extremely flexible. It is capable of bridging shrinkage cracks in the concrete and will accommodate minor differential movement throughout the service life of the structure.

Application Procedures:

Safety, Storage and Handling Information
Bituthene products must be handled properly. Vapors from solvent-based primers and mastic are harmful and flammable. For these products, the best available information on safe handling, storage, personal protection, health and environmental considerations has been gathered. Material Safety Data Sheets (MSDS) are available at graceconstruction.com and users should acquaint themselves with this information. Carefully read detailed precaution statements on product labels and the MSDS before use.

Surface Preparation
Surfaces should be structurally sound and free of voids, spalled areas, loose aggregate and sharp protrusions. Remove contaminants such as grease, oil and wax from exposed surfaces. Remove dust, dirt, loose stone and debris. Concrete must be properly cured (minimum 7 days for normal structural concrete and 14 days for lightweight structural concrete).If time is critical, Bituthene Primer B2 or Bituthene Primer B2 LVC may be used to allow priming and installation of membrane on damp surfaces or green concrete. Priming may begin in this case as soon as the concrete will maintain structural integrity. Use form release agents which will not transfer to the concrete. Remove forms as soon as possible from below horizontal slabs to prevent entrapment of excess moisture. Excess moisture may lead to blistering of the membrane. Cure concrete with clear, resin-based curing compounds which do not contain oil, wax or pigment. See Technical Letter 5 for more information. Except with Bituthene Primer B2 or Bituthene Primer B2 LVC, allow concrete to thoroughly dry following rain. Do not apply any products to frozen concrete. Repair defects such as spalled or poorly consolidated areas. Remove sharp protrusions and form match lines. For rough or uneven deck surfaces use Bituthene Deck Prep as a repair and leveling agent. See Above Grade Waterproofing Bituthene Deck Prep product information sheet for details. On masonry surfaces, apply a parge coat to rough concrete block and brick walls or trowel cut mortar joints flush to the face of the concrete blocks.

• Apply Bituthene 3000 Membrane only in dry weather and at air and surface temperatures of 40°F (5°C) and above.
• Apply Bituthene Low Temperature Membrane only in dry weather and when air and surface temperatures are between 25°F (-4°C) and 60°F (16°C).
• Apply Bituthene Primer WP-3000 in dry weather above 40°F (5°C).
• Apply Bituthene Primer B2 or Bituthene Primer B2 LVC in dry weather above 25°F (-4°C). (See separate product information sheet.)

• Apply Bituthene Primer WP-3000 by spray or roller at a coverage rate of 500–600 ft2/gal (12–15 m2/L). Allow to dry one hour or until concrete returns to original color.
• Apply Bituthene Primer B2 by a lamb’s wool roller at a coverage rate of 250–350 ft2/gal (6–8 m2/L). Allow primer to dry one hour or until tack-free.
• Apply Bituthene Primer B2 LVC by a lamb’s wool roller at a coverage rate of 325–425 ft2/gal (7.5–10.0 m2/L). Allow primer to dry one hour or until tack-free.
• Dry time may be longer in cold temperatures. Reprime areas if contaminated by dust. If the work area is dusty, apply membrane as soon as the primer is dry.
• Do not apply any primer onto Bituthene membrane.

Corner Details
The treatment of corners varies depending on the location of the corner. For detailed information on Bituthene Liquid Membrane, see separate product information sheet.

• At plaza deck to wall inside corners
  • Option 1: Apply membrane on wall and deck to within 1 in. (25 mm) of corner. Treat the inside corner by installing a 3/4 in. (20 mm) fillet of Bituthene Liquid Membrane. Extend Bituthene Liquid Membrane at least 21/2 in. (65 mm) onto deck membrane, and 21/2 in. (65 mm) onto wall membrane. Terminate top of wall flashing with Bituthene Mastic, Bituthene Liquid Membrane or termination bar.
  • Option 2:Apply membrane on deck to within 1 in. (25 mm) of corner. Treat the inside corner by installing a 3/4 in. (20 mm) fillet of Bituthene Liquid Membrane. Extend Bituthene Liquid Membrane at least 21/2 in. (65 mm) onto wall.
  • Option 3:Apply membrane on deck to within 1 in. (25 mm) of corner. Treat the inside corner by installing a 3/4 in. (20 mm) fillet of Bituthene Liquid Membrane. Apply membrane flashing sheet on wall, over fillet and 6 in. (150 mm) onto deck membrane. Apply 1 in. (25 mm) wide troweling of Bituthene Mastic or Bituthene Liquid Membrane over all terminations and seams within 12 in. (300 mm) of corner. Terminate top of wall flashing with mastic, Bituthene Liquid Membrane or termination bar.
• In planters, reflecting pools and fountains, apply membrane on wall and deck to within 1 in. (25 mm) of corner. Treat the inside corner by installing a 3/4 in. (20 mm) fillet of Bituthene Liquid Membrane. Extend Bituthene Liquid Membrane at least 21/2 in. (65 mm) onto deck membrane, and 21/2 in. (65 mm) onto wall membrane. Terminate top of wall membrane with Bituthene Liquid Membrane or termination bar.
• Wall to wall inside corner, apply 12 in. (300 mm) sheet membrane strip centered on corner. Press membrane tightly into corner to assure full contact. Cover the treated corner with a full sheet of membrane to ensure 2-ply coverage.
• Outside corners, apply 12 in. (300 mm) sheet membrane strip centered on corner. Cover the treated corner with a full sheet of membrane to ensure 2-ply coverage.

Insulation
Always apply Bituthene membrane directly to primed or conditioned structural substrates. Insulation, if used, must be applied over the membrane. Do not apply Bituthene membranes over lightweight insulating concrete.

Approvals

• City of Los Angeles Research Report RR 24386
• Miami-Dade County Code Report NOA 04-0114.03
• U.S. Department of Housing and Urban Development (HUD) HUD Materials Release 628E
• Bituthene 3000 and Low Temperature Membranes carry a Underwriters’ Laboratory Class A Fire Rating (Building Materials Directory, File #R7910) when used in either of the following constructions:
• Limited to noncombustible decks at inclines not exceeding 1/4 in. (6 mm) to the horizontal 1 ft (0.3 m). One layer of Bituthene waterproofing membrane, followed by one layer of 1/8 in. (3 mm) protection board, encased in 2 in. (50 mm) minimum concrete monolithic pour.
• Limited to noncombustible decks at inclines not exceeding 1/4 in. (6 mm) to the horizontal 1 ft (0.3 m). One layer of Bituthene waterproofing membrane, followed by one layer of DOW Styrofoam PD Insulation Board [2 in. (50 mm) thick]. This is covered with one layer of 2 ft x 2 ft x 2 in. (0.6 m x 0.6 m x 50 mm) of concrete paver topping.

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