Sika Sika Greenstreak Flexible PVC Waterstop Ribbed Centerbulb 709

Sika Greenstreak Flexible PVC Waterstop is a heavy-duty joint sealing solution engineered to stop water infiltration in demanding concrete construction applications. The ribbed centerbulb profile is specifically designed to handle lateral, transverse, and shear movement at active joints, ensuring long-term watertight integrity even as structures shift and settle over time. At 9 inches wide and 3/8 inch thick, this large-format waterstop delivers the robust cross-section needed to perform in high-hydrostatic pressure environments where undersized profiles simply won’t hold up.

This waterstop is a go-to choice for engineers and contractors working on critical infrastructure projects, including retaining walls, underground tunnels, water treatment and wastewater facilities, bridge abutments, and below-grade foundations. The wider profile provides greater embedment depth on each side of the joint, improving the waterstop’s ability to resist hydrostatic head pressure and prevent water migration through the concrete joint.

Manufactured from premium virgin PVC compound, every foot of Sika Greenstreak waterstop is formulated to meet or exceed the physical property requirements of the Army Corps of Engineers PVC Waterstop Specification CRD-C 572-74. The material’s inherent chemical resistance makes it well-suited for exposure to a wide range of waterborne chemicals encountered in industrial and municipal water containment applications. Whether specified for new construction or a major infrastructure rehabilitation project, this 9-inch ribbed centerbulb waterstop offers the performance, reliability, and compliance that demanding projects require.

Key Features

The 709 is built around a ribbed centerbulb profile — the most versatile waterstop geometry available for movement joints. The centerbulb flexes to absorb lateral, transverse, and shear movement at the joint, while the ribbed flanges improve mechanical bond and sealing performance within the surrounding concrete. This combination makes it one of the most reliable options available for joints where long-term movement and high-hydrostatic pressure are both a concern.

Constructed from high-quality virgin PVC, this waterstop resists a broad spectrum of waterborne chemicals, UV exposure, and temperature extremes without cracking, stiffening, or degrading over time. It carries NSF/ANSI Standard 61 certification, confirming its suitability for potable water contact — an important requirement for water treatment plants, reservoirs, and municipal infrastructure projects. It also fully complies with the Army Corps of Engineers PVC Waterstop Specification CRD-C 572-74, meeting the stringent physical property benchmarks required on federally specified and heavy civil construction projects.

In the field, the 709 installs using standard heat welding techniques, allowing contractors to create continuous, watertight splices at transitions and intersections. Factory-fabricated fittings are strongly recommended for corners and changes of direction to minimize the risk of field weld failures. The result is a seamless waterproofing diaphragm through the full length of the joint, well-suited for tunnels, bridge abutments, below-grade foundations, containment structures, and anywhere high-hydrostatic pressure resistance is required.

Technical Specifications

Frequently Asked Questions

What applications is the Sika Greenstreak 709 PVC Waterstop used for? The 709 is widely specified for heavy civil and infrastructure projects where reliable, long-term joint waterproofing is critical. Common applications include retaining walls, underground tunnels, bridge abutments, water and wastewater treatment plants, below-grade foundation walls, reservoirs, and concrete containment structures. Its large 9-inch profile and high-hydrostatic pressure resistance make it particularly well-suited for deep below-grade construction and high head pressure environments.

How is the 709 waterstop installed? The waterstop is positioned within the formwork prior to concrete placement, with the centerline of the profile aligned with the center of the joint. Half of the waterstop is encapsulated in the first concrete pour, with the remaining half projecting out to be embedded in the second pour. Proper concrete consolidation around the profile is essential for a fully watertight installation. Transitions, corners, and intersections should be heat welded — factory-fabricated fittings are strongly recommended to reduce the risk of field weld failure.

What size is the 709 waterstop? The 709 profile measures 9 inches in width and 3/8 inch in thickness and is supplied in a standard 50-foot roll. The wider profile provides greater embedment on each side of the joint, improving resistance to hydrostatic pressure and water migration.

Is the 709 approved for potable water applications? Yes. The Sika Greenstreak 709 meets NSF/ANSI Standard 61, certifying it as safe for contact with potable water. This makes it an approved choice for drinking water treatment facilities, reservoirs, aqueducts, and other municipal water infrastructure projects.

Is this waterstop resistant to chemicals? Yes. The virgin PVC compound used in the 709 offers strong resistance to a wide range of waterborne chemicals, making it a dependable choice for industrial containment structures, wastewater treatment facilities, and environmentally sensitive applications where chemical exposure is a factor.

Does the 709 comply with Army Corps of Engineers specifications? Yes. The 709 meets the physical property requirements of the Army Corps of Engineers PVC Waterstop Specification CRD-C 572-74, making it suitable for federally specified projects and heavy civil construction where strict material compliance is required.

Can the 709 handle joint movement? Yes. The ribbed centerbulb geometry is specifically engineered for movement joints. The centerbulb accommodates lateral, transverse, and shear movement, allowing the joint to expand, contract, and shift without compromising the watertight seal. It is not recommended for joints expected to experience large-scale structural movement, in which case a tear web profile may be more appropriate.