PRODUCT NAME:

Basic Use:  "A Waterstop is usually a section of flexible waterproof material placed at any joint in concrete to prevent the passage of water."  Williams Products, Inc. has been a pioneer supplier to constructors with the Williams Everlastic® Waterstop System since 1954.  Joints in concrete structure, on one side of which is subject to hydrostatic load, are generally provided with waterstops bridging joints and embedded in concrete on either side.  In concrete joints where expansion and contraction cause the joints to close and open, the waterstop must be designed to accommodate itself to movement.  The primary reason for specifying Rubber Waterstops rather than metal or PVC is their superior performance in withstanding shear movements and to resisting hydrostatic pressure.

Rubber Waterstops will elongate over four times original size (ASTM D 412-75) and will continue returning to near original shape after repeated movement.  They have very low compression set and perform well at low temperatures.

The Williams System features sleeve type fittings that provide fast positive splicing and precise waterstop alignment.  Fittings are manufactured from the same elastomers/polymers as the waterstop.

Sewer plants, water filtration plants, aqueducts, resevoirs, locks, tanks, channels, swimming pools, culverts, tunnels, underpasses, bridge decks and abutments, roofs, dams, foundations, mineshafts, retaining walls and any concrete structure requiring watertight joints.

The Dumbell Waterstop is adequate for all vertical and horizontal stress across the joint in the same plane as the waterstop.  6" Dumbell Waterstop is adequate for all vertical and horizontal construction joints.  6" Dumbell is also used on expansion joints up to 1".  9" and 12" Dumbell is used in expansion joints of 1" to 2".  6" Centerbulb is used in expansion joints up to 1" where shear movement is expected and 9" centerbulb is used in expansion joints up to 2" where shear movement is expected.  The Centerbulb is hollow so it can deform to absorb shear movements.  Split Waterstops are used for short straight runs only.  When Split Waterstops are spread against forms, connecting unions cannot be used.

SBR (Styrene Butadiene Rubber) is the industry standard and used in most applications.  Neoprene rubber is more expensive and is used where hostile environmental conditions are present and the waterstop is exposed to continuous heavy concentrations of oil, gasoline, sewerage, ozone, ultra-violet rays or injurious chemicals.  Special situations may require special materials and designs.  These are available from Williams Products, Inc.

Williams SBR Hi-Tensile Rubber Waterstop meets Williams Products, Inc. specification 2010 and exceeds U.S. Army Corps of Engineers specification CRD-C 513-71 (complete) and specification CRD-C 513-74 (less ozone) and contains 100% neoprene polymer.  Waterstops and fitting are manufactured in accordance with the Rubber Manufacturers.

Nuclear Standards:  Williams Products Waterstops that conform to the quality material and conditions of service (seismic movement, hydrostatic head and radiation dosage) standards set forth by the U.S. Atomic Energy Commission, Nuclear Regulatory Commission and the Nuclear Power Plant Contractors.  Williams Products SBR Hi-Tensile Waterstops are currently being installed at numerous nuclear power plants.

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