Sika 515306 Polyurethane Concrete Crack Sealant 10.1 Oz Gray

Product Description

The SIKA 515306 is a one-part polyurethane crack sealant designed to repair cracks up to 1 inch wide in horizontal concrete surfaces. Sold in a 10.1 oz cartridge, it uses an elastic technology formulation that keeps the sealant flexible after cure, allowing it to move with the crack rather than break away. The result is a permanent, watertight seal suited for both indoor and outdoor applications. The gray color blends with standard concrete. The product is safe to apply on green and damp concrete, which reduces downtime on active job sites.

This sealant is used by concrete contractors, masons, and general trade professionals repairing driveways, slabs, warehouse floors, sidewalks, and other horizontal concrete surfaces. Because it gradually self-levels, it works well in flat or near-flat applications where tooling a surface finish is impractical. Its tolerance for green and damp concrete makes it a practical choice in construction schedules where full concrete cure cannot be waited on before sealing begins.

Key Features

• One-part polyurethane formula — no mixing required
• Repairs cracks up to 1 inch wide in horizontal concrete
• Elastic technology allows the sealed joint to flex and move with the substrate
• Self-leveling on horizontal surfaces — minimal tooling needed
• Bonds to green and damp concrete
• Permanent watertight seal for indoor and outdoor use
• 12-month shelf life

Compatibility

Designed for use on horizontal concrete surfaces including slabs, driveways, floors, and sidewalks. Suitable for both indoor and outdoor applications. Compatible with green and damp concrete substrates.

Installation Notes

Application is typically performed by concrete or masonry trades using a standard 10 oz caulk gun. Clean the crack of loose debris, dust, and standing water before application. In very deep cracks, use a backer rod to control sealant depth before applying. Allow adequate cure time before exposing the sealed area to foot or vehicle traffic.