Sika Sika Greenstreak Flexible PVC Waterstop Ribbed Centerbulb 705

The Sika Greenstreak 705 is a high-performance flexible PVC waterstop system engineered to stop water infiltration at concrete construction and expansion joints. Featuring a ribbed centerbulb (RCB) profile, this waterstop is purpose-built to accommodate lateral, transverse, and shear joint movement — delivering a durable, watertight seal even in dynamic structural environments where lesser materials would fail.

At 6 inches wide and 3/8 inch thick, the 705 profile provides a robust cross-section that stands up to high-hydrostatic pressure conditions, making it a trusted solution for engineers and contractors working on critical infrastructure projects. Whether specified for underground retaining walls, below-grade foundations, water storage reservoirs, cast-in-place tunnels, or industrial containment structures, this waterstop delivers the performance margins needed to protect long-term structural integrity.

Manufactured from premium-grade virgin PVC, the Greenstreak 705 offers superior material consistency, exceptional elongation, and outstanding resistance to waterborne chemicals — properties that hold up across decades of continuous water exposure. Its ribbed flange design improves mechanical bond within the concrete pour, reducing the risk of blowouts or joint failure during and after placement. Factory-fabricated fittings and intersections are available and strongly recommended to ensure a fully continuous waterproofing diaphragm throughout the structure.

The 705 ribbed centerbulb waterstop meets the rigorous physical property requirements of the Army Corps of Engineers PVC Waterstop Specification CRD-C 572-74 and is NSF/ANSI Standard 61 certified for potable water contact — making it equally suitable for drinking water infrastructure, wastewater treatment facilities, and environmentally sensitive containment applications. Each roll is supplied in a convenient 50-foot length, ready for installation via standard heat welding techniques.

Key Features

The Greenstreak 705 is constructed from high-quality virgin flexible PVC, providing the material integrity and long-term durability that critical waterproofing applications demand. Its ribbed centerbulb profile is the defining performance feature — the centerbulb geometry actively accommodates lateral, transverse, and shear joint movement, while the ribbed flanges create a stronger mechanical bond within the surrounding concrete, reducing the likelihood of joint failure or water bypass over time.

Durability in harsh environments is a core strength of the 705 profile. The flexible PVC compound resists waterborne chemicals, UV exposure, and extreme temperature fluctuations, ensuring consistent performance across a wide range of service conditions — from below-grade foundations and buried tunnel linings to exposed containment structures and water treatment basins. The material is rated for high-hydrostatic pressure conditions, making it a reliable choice where significant water head pressure is present.

The 705 meets the physical property requirements of the Army Corps of Engineers PVC Waterstop Specification CRD-C 572-74 and carries NSF/ANSI Standard 61 certification, qualifying it for use in potable water systems, drinking water treatment facilities, and other infrastructure where water contact safety is a regulatory requirement.

Installation is straightforward using standard heat welding techniques, allowing contractors to create secure, continuous splices in the field. Factory-fabricated transitions and intersections are available for complex joint configurations and are strongly recommended to maximize system integrity and minimize the risk of field weld failures.

Technical Specifications

Frequently Asked Questions

What applications is the Sika Greenstreak 705 PVC Waterstop used for? The 705 ribbed centerbulb waterstop is engineered for a wide range of concrete joint waterproofing applications. It is commonly specified for retaining walls, cast-in-place tunnels, bridge abutments, below-grade foundations, water and wastewater treatment plants, reservoirs, and industrial containment structures. Any application where a concrete construction or expansion joint must remain watertight under sustained hydrostatic pressure is a strong candidate for this profile.

How is the Sika Greenstreak 705 waterstop installed? The 705 is installed prior to concrete placement by positioning it across the joint so that each ribbed flange is fully encapsulated within its respective concrete pour. Split formwork is typically required for wall-to-wall and slab-to-wall joints. The centerline of the waterstop should be aligned with the center of the joint. Transitions, corners, and intersections should be heat welded using a PVC waterstop splicing iron to maintain a continuous, uninterrupted waterproofing diaphragm. Factory-fabricated fittings are strongly recommended for intersections and directional changes.

What size is the Greenstreak 705 waterstop? The 705 profile measures 6 inches in width and 3/8 inch in thickness, supplied in a 50-foot roll. This wider, thicker profile provides an increased surface area for concrete bond and a more robust cross-section for resisting high-hydrostatic head pressure compared to thinner, narrower profiles.

Is the 705 waterstop resistant to chemicals? Yes. The 705 is manufactured from flexible virgin PVC, which offers excellent resistance to a broad spectrum of waterborne chemicals commonly encountered in industrial, municipal, and environmental applications. It is well-suited for wastewater treatment facilities, chemical containment structures, and other environments where the waterstop may be exposed to aggressive fluids over extended periods.

Is the Sika Greenstreak 705 certified for potable water use? Yes. The 705 carries NSF/ANSI Standard 61 certification, meaning it has been independently tested and approved for use in structures that come into contact with drinking water. This makes it a compliant choice for municipal water treatment plants, water storage tanks, reservoirs, and related potable water infrastructure.

What is a ribbed centerbulb waterstop and why does it matter? A ribbed centerbulb waterstop features two key design elements working together: the ribbed flanges, which improve mechanical bond and sealing performance within the concrete, and the centerbulb, which acts as a flexible reservoir at the joint centerline to absorb lateral, transverse, and shear movement without placing the material under damaging tension. This makes ribbed centerbulb profiles the most versatile and best-sealing waterstop geometry available for movement joints.

Does the 705 meet Army Corps of Engineers specifications? Yes. The Sika Greenstreak 705 meets the physical property requirements of Army Corps of Engineers PVC Waterstop Specification CRD-C 572-74, which is one of the most widely referenced industry benchmarks for PVC waterstop performance. This compliance makes it suitable for federally funded infrastructure projects and other work where adherence to Corps of Engineers standards is required.

Can field splices be made on the jobsite? Yes. The 705 is heat weldable, allowing field splices to be made using a Sika Greenstreak splicing iron. However, for intersections, tees, crosses, and changes in direction, factory-fabricated fittings are strongly recommended over field welds. Factory fabrications are produced under controlled conditions, resulting in more consistent, reliable joints and a lower risk of waterstop system failure.