Sika Sika Greenstreak Flexible PVC Waterstop Ribbed Centerbulb 732

The Sika Greenstreak 732 Flexible PVC Waterstop is a premium concrete joint sealing solution engineered to deliver long-term watertight protection across a wide range of demanding construction environments. Specifically designed for both expansion joints and construction joints, this ribbed centerbulb profile creates a secure, continuous seal capable of withstanding high-hydrostatic pressure conditions where joint integrity is critical.

With a 6-inch profile width and 3/8-inch thickness, the 732 RCB strikes the ideal balance between flexibility and structural durability. The ribbed centerbulb geometry is purpose-built to accommodate lateral, transverse, and shear joint movement — ensuring the waterstop maintains a watertight barrier even as the surrounding concrete structure shifts or settles over time.

Manufactured from high-quality virgin PVC compound, the Greenstreak 732 meets or exceeds all relevant industry waterproofing standards, making it a dependable specification choice for engineers and contractors alike. Its chemical resistance, dimensional stability, and long service life make it well-suited for infrastructure projects exposed to continuous or intermittent water contact.

Common applications for the 732 ribbed centerbulb waterstop include retaining walls, underground tunnels, water and wastewater treatment plants, bridge abutments, below-grade foundation walls, reservoirs, and containment structures — anywhere a proven, code-compliant concrete joint waterproofing solution is required.

Key Features

The Sika Greenstreak 732 is built around a ribbed centerbulb profile — one of the most effective waterstop geometries available for concrete joint waterproofing. The centerbulb design directly addresses the demands of movement joints by accommodating lateral, transverse, and shear displacement, while the ribbed flanges improve mechanical bonding within the surrounding concrete for a more secure, long-lasting seal.

Material quality is a defining characteristic of the Greenstreak 732. Formulated from high-grade virgin PVC, this waterstop resists a broad spectrum of waterborne chemicals, stands up to UV exposure, and maintains performance across extreme temperature ranges — making it a reliable choice in both harsh industrial environments and outdoor infrastructure applications. It is also NSF/ANSI Standard 61 certified, confirming its suitability for potable water contact in drinking water systems, treatment facilities, and related structures.

From a compliance standpoint, the 732 meets the physical property requirements of the Army Corps of Engineers PVC Waterstop Specification CRD-C 572-74 — a benchmark specification widely referenced in municipal, civil, and federal construction projects. This makes it straightforward to specify with confidence across a variety of project types, from below-grade foundations and tunnels to reservoirs, containment structures, and water treatment plants.

Installation is handled through heat welding, the only recognized method for joining PVC waterstop. This allows for continuous, field-spliced runs and factory-fabricated transitions at corners and intersections, helping ensure the integrity of the watertight diaphragm throughout the entire joint system.

Technical Specifications

Frequently Asked Questions

What applications is the Sika Greenstreak 732 PVC Waterstop used for? The 732 ribbed centerbulb waterstop is widely specified across heavy civil and municipal construction projects. Common applications include retaining walls, underground tunnels, bridge abutments, water and wastewater treatment plants, below-grade foundation slabs, reservoirs, aqueducts, flood walls, and containment structures. Any concrete joint application requiring a proven, long-term watertight seal is a strong candidate for this profile.

How is the Greenstreak 732 waterstop installed? The waterstop is embedded directly into the concrete joint prior to placement, allowing the concrete to fully encapsulate both flanges of the profile. Proper positioning is critical — the centerline of the waterstop should be aligned with the center of the joint. The outer edges of the waterstop are typically tied off to adjacent reinforcing steel to prevent shifting or misalignment during the pour. Split formwork is generally required for slab-to-slab, slab-to-wall, and wall-to-wall joints when using a ribbed centerbulb profile.

What size is the Greenstreak 732 waterstop? This specific model features a 6-inch profile width and 3/8-inch thickness, supplied in a convenient 50-foot roll. This sizing makes it well-suited for moderate to high-demand joint applications where a robust, flexible profile is needed without oversizing the installation.

Is the Greenstreak 732 resistant to chemicals? Yes. The high-grade virgin PVC compound used in the Greenstreak 732 provides excellent resistance to a wide range of waterborne chemicals, making it a dependable choice for industrial facilities, chemical containment structures, and wastewater treatment environments where exposure to aggressive fluids is a concern.

Does the Greenstreak 732 meet potable water standards? Yes. The 732 is NSF/ANSI Standard 61 certified, meaning it has been independently tested and approved for contact with potable water. This certification makes it suitable for use in drinking water infrastructure, municipal water treatment plants, reservoirs, and other applications where water safety compliance is required.

Can the Greenstreak 732 accommodate joint movement? Yes. The ribbed centerbulb geometry is specifically engineered to handle lateral, transverse, and shear movement at concrete joints. This makes the 732 appropriate for expansion joints and construction joints where some degree of movement due to thermal cycling, settlement, or live load deflection is anticipated.

How are splices and transitions handled during installation? Heat welding is the only recognized method for splicing PVC waterstop and should be used at all transitions, intersections, and changes of direction. Sika strongly recommends factory-fabricated fittings for corners and intersections to minimize the risk of field weld failures. A Sika Greenstreak splicing iron with the appropriate replacement cover should be used for any field welding required on the jobsite.

What is the difference between a ribbed centerbulb and a dumbbell waterstop profile? Both profiles are used in concrete joint waterproofing, but they serve slightly different purposes. The ribbed centerbulb design — like the Greenstreak 732 — is the more versatile of the two and is generally preferred for movement joints due to its superior sealing characteristics and ability to accommodate multi-directional movement. Dumbbell profiles are better suited for non-moving joints where little to no joint displacement is expected.