Engineered to fit over a wide variety of expansion board materials, the Sika Greenstreak G-Seal PVC cap seal delivers a proven, long-lasting, and maintenance-free concrete joint sealing solution for both new construction and retrofit applications. Functioning similarly to an embedded PVC waterstop, the G-Seal is designed to accommodate joint movement — including expansion, contraction, and lateral shift — without seal failure, making it a reliable choice for high-traffic and high-stress concrete pavement environments. Available in multiple profile styles to suit new construction and retrofit applications alike, the G-Seal provides the versatility and performance needed to meet the demands of any concrete joint sealing project.
Key Features and Advantages
The Sika Greenstreak G-Seal is engineered for long-term performance with virtually zero maintenance requirements, delivering significant cost savings over the life of the structure compared to traditional joint sealant systems. Its unique PVC formulation is specifically designed to withstand harsh environmental conditions, offering exceptional abrasion resistance and durability in even the most demanding concrete pavement applications.
Installation is straightforward and cost-effective — no special tools or equipment are required, and the G-Seal can be installed in any weather condition without delays or complications. Once placed, it creates a clean, professional joint appearance that blends seamlessly with surrounding concrete thanks to its grey coloring, which is produced specifically to complement finished concrete surfaces.
The G-Seal forms a strong mechanical bond within the concrete joint, accommodating movement without failure while simultaneously acting as a debris shield to prevent contamination and deterioration of the joint over time. Its flexible PVC construction also makes it well suited for radius forming applications, giving contractors greater versatility on complex or curved joint layouts.
Factory-made fabrications are available to simplify transitions and ensure consistent performance across the entire joint system. The G-Seal is offered in standard, retrofit, and screed cap profiles to address the full range of project needs, and is available in both 10-foot pieces and 50-foot rolls to suit projects of any scale.
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Shore A Hardness | 81 ± 3 | ASTM D2240 |
| Tensile Strength | 2,350 psi min. | ASTM D412 |
| Elongation | 375% | ASTM D412 |
| Color | Grey | — |
| Packaging | 10 ft pieces / 50 ft rolls | — |
Frequently Asked Questions
What is the Sika Greenstreak G-Seal used for? The G-Seal is a modified PVC paving cap seal designed for use in control, expansion, and construction joints in concrete pavement. It creates a continuous watertight diaphragm over expansion board materials to prevent fluid migration, debris accumulation, and long-term joint deterioration.
What makes the G-Seal different from a traditional waterstop? While the G-Seal shares many performance characteristics with an embedded PVC waterstop, it is installed by placing it over expansion board materials rather than embedding it within the concrete. This makes it suitable for both new construction and retrofit applications without requiring full joint reconstruction.
Does the G-Seal require any special tools or equipment to install? No. One of the key advantages of the G-Seal is that it requires no special tools or equipment for installation. It is attached to the expansion board using standard staples or nails driven through the bottom flange area prior to concrete placement.
Can the G-Seal be installed in cold or wet weather conditions? Yes. The G-Seal is designed for installation in any temperature or climate condition, making it a reliable choice for projects where weather delays are a concern.
What profiles and sizes are available? The G-Seal is available in standard, retrofit, and screed cap profiles to address a wide range of project requirements. It is supplied in both 10-foot pieces and 50-foot rolls depending on project scale and preference.
Is the G-Seal suitable for curved or radius joint applications? Yes. The flexible PVC construction of the G-Seal makes it well suited for use in radius forming applications, giving contractors the versatility to work with curved or non-linear joint layouts without compromising sealing performance.
What color is the G-Seal? The G-Seal is produced in grey to blend naturally with finished concrete surfaces, maintaining a clean and professional appearance across the joint.
Are factory fabrications available? Yes. Factory-made fabrications are available for transitions and directional changes, ensuring consistent watertight performance throughout the joint system and reducing the risk of field installation errors.
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