Waterstop Strip

TechCrete® Waterstop Strip is a hydrophilic strip waterstop designed to stop water infiltration through cast-in-place concrete construction joints by expanding upon contact with water to form a positive seal against the concrete. TechCrete Waterstop Strip is designed to be used in the TechCrete 2500 Waterproofing System on new construction projects. The key to TechCrete Waterstop Strip effectiveness is its superior expansion to seal and fill voids and cracks in the concrete. TechCrete Waterstop Strip is an active bentonite/butyl-rubber based waterstop that is designed to replace passive PVC/rubber dumbbell waterstops, thereby eliminating the requirement of special pieces, split-forming and seam welding. TechCrete Waterstop Strip has been successfully tested by independent testing firms to over 60 meters (200 feet) of hydrostatic water pressure, under both continuous immersion and wet/dry cycling. TechCrete Waterstop Strip is available in three sizes. 3/4” x 1”, 1/2” x 1.25” and 3/8” x 3/4”.
Though TechCrete Waterstop Strip possesses good resistance to many chemicals, the waterstop is not intended to be used as the primary joint sealant for chemical containment vessels. Consult manufacturer for guidance regarding chemical compatibility for secondary chemical containment applications. Additionally, TechCrete Waterstop Strip is not an expansion joint sealant.

Shelf Life & Storage

No known limit to shelf life. Keep container sealed and avoid prolonged exposure to direct sunlight.

Packaging

• TC-100 3/4” x 1” x 16’-8” 6 rolls / box
• TC-150 1/2” x 1.25” x 16’-8” 6 rolls / box
• TC-00 3/8” x 3/4” x 25’ 8 rolls / box

Application

Applications include both vertical and horizontal non-moving concrete construction joints, new to existing concrete construction, irregular surfaces, and around through-wall penetrations, such as plumbing and utility pipes. Additionally TechCrete Waterstop Strip can seal around concrete pilings and steel H-piles passing through the slab. TechCrete Waterstop Strip works in both continuous hydrostatic and intermittent hydrostatic conditions.
TechCrete Waterstop Strip is designed for reinforced structural concrete with a minimum of 3,000 psi (20N/ mm2) compressive strength. TC-101 and TC-101T are designed for concrete 8” (200 mm) thick or greater with two rows of reinforcing steel. TC-102 is designed for vertical concrete 6” (150 mm) thick or greater; and horizontal concrete no less than 4” (100 mm) thick. TC-102 should be used in concrete with one row of steel reinforcement,
concrete curbs, planter walls, fountains, and lightweight structural concrete.

Installation

Surface preparation: Surfaces should be clean and dry. Remove all dirt, rocks, rust or other construction debris. Do not install TechCrete Waterstop Strip in standing water or on an iced substrate.
Adhesive: Apply a continuous bead of TechCrete Waterstop Adhesive along the substrate where TechCrete Waterstop Strip will be installed. Keep the
nozzle tip pressed against the concrete at a 450 angle during application.
Installation: After applying a continuous bead of TechCrete Waterstop Adhesive, firmly press the entire length of TechCrete Waterstop Strip onto the adhesive. For vertical and overhead applications, firmly press a minimum of 15 seconds to assure adhesion.


Tightly butt coil ends together to form a continuous waterstop – do not overlap coil ends. Place in maximum practical lengths to minimize coil end joints. Where required, cut coils with a sharp knife or utility blade to fit coil ends together. Make horizontal to vertical transitions by abutting product coil sections together. No special accessory pieces are required. At structural and pipe penetrations, cut into strips to fit around the penetration.
Apply to adhesive and abut coil ends together.
There should not be any air gap between the TechCrete Waterstop Strip and the substrate.

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