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• Flexible—accommodates minor structural If time is critical,Bituthene Primer B2 or movements and will bridge shrinkage cracks Bituthene Primer B2 LVC may be used to • UL approval Class A Fire Rating—see allow priming and installation of membrane approvals section inside for details on damp surfaces or green concrete. Priming • Ripcordt—this Split Release on Demand may begin in this case as soon as the concrete feature allows the splitting of the membrane will maintain structural integrity. Use form into two(2)pieces for ease of installation in release agents which will not transfer to the detailed areas concrete. Remove forms as soon as possible from below horizontal slabs to prevent Use entrapment of excess moisture. Excess mois- Bituthene is ideal for waterproofing concrete ture may lead to blistering of the membrane. decks where in-service temperatures will not Cure concrete with clear, resin-based curing exceed 130°F(54°C). It can be applied to compounds which do not contain oil,wax or split slab construction such as in plaza areas pigment. Except with Bituthene Primer B2 or and parking decks.Interior uses may include Bituthene Primer B2 LVC,allow concrete to mechanical rooms,laboratories,kitchens and thoroughly dry following rain. Do not apply bathrooms. (For below grade applications,see any products to frozen concrete. "Below Grade Waterproofing Bituthene Repair defects such as spalled or poorly System 4000.") consolidated areas. Remove sharp protrusions Bituthene is ''/e in. (1.5 mm)thick,3 ft(0.9 m) and form match lines. For rough or uneven wide and 66.7 ft(20 m) long and is supplied surfaces use Bituthene Deck Prep"as a repair in rolls. It is unrolled adhesive side down onto and leveling agent. See"Bituthene Deck concrete slabs primed with System 4000. Prep"product information sheet for details. Surface Conditioner. Continuity is achieved On masonry surfaces,apply a parge coat to by overlapping a minimum 2 in.(50 mm)and rough concrete block and brick walls or firmly rolling the joint. trowel cut mortar joints flush to the face of Bituthene is extremely flexible. It is capable the concrete blocks. of bridging shrinkage cracks in the concrete Temperature and will accommodate minor differential • Apply Bituthene System 4000 Membrane movement throughout the service life of the and Conditioner only in dry weather and structure, when air and surface temperatures are 25°F (-4°C)or above. Application Procedures • Apply Bituthene Primer B2 in dry weather Safety, Storage and Handling above 25°F(-4°C). (See separate product Information information sheet.) Bituthene products must be handled properly. Conditioning Vapors from solvent-based primers and Bituthene System 4000 Surface Conditioner mastic arc harmful and flammable.For these is ready to use and can be applied by spray or products, the best available information on roller. For best results,use a pump-type air safe handling,storage,personal protection, P p-Typ health and environmental considerations sprayer with fan tip nozzle, like the Bituthene has been gathered.Material Safety System 4000 Surface Conditioner Sprayer,to Data Sheets(MSDS)are available at apply the surface conditioner. www.graceconstruction.com and users should Apply Bituthene System 4000 Surface Condi- acquaint themselves with this information. tioner to clean,dry, frost-free surfaces at a Carefully read detailed precaution statements coverage rate of 300 ft2/gal(7.4 m2/L). Cover- on product labels and the MSDS before use. age should be uniform. Surface conditioner Surface Preparation should not be applied so heavily that it Surfaces should be structurally sound and free puddles or runs.Do not apply conditioner to of voids,spalled areas, loose aggregate and Bituthene membrane. sharp protrusions. Remove contaminants such Allow Bituthene System 4000 Surface Condi- as grease, oil and wax from exposed surfaces. boner to dry one hour or until substrate Remove dust,dirt,loose stone and debris. returns to its original color.At low tempera- Concrete must be properly dried(minimum tures or in high humidity conditions, dry time 7 days for normal structural concrete and may be longer. 14 days for lightweight structural concrete).