Flex Seal FSH8W-4 Rubber Sealant 8 Oz White

Product Description

The FLEX SEAL FSH8W-4 is a thick rubber adhesive sealant designed to caulk, bond, and seal a wide range of surfaces in one application. Dispensed as a smooth, even bead, it fills cracks and holes without runs, drips, or mess. The cured bead expands and contracts with surface movement, maintaining a waterproof barrier over time. At 8 oz per unit, it is sized for targeted repairs and small-to-medium sealing jobs. Plumbers, HVAC technicians, roofers, and general contractors reach for this type of product when a flexible, waterproof seal is needed fast without mixing or priming.

This sealant is suited for both residential and light commercial applications. Typical use cases include sealing around sink basins, shower surrounds, tub edges, tile joints, window frames, skylights, roof penetrations, and gutter seams. Its adhesion to virtually any clean, dry surface makes it a versatile option for trade professionals who carry it as a general-purpose sealing compound on service calls.

Key Features

• Thick rubber formula caulks, bonds, and seals in a single step
• Waterproof barrier fills cracks and holes with no runs or drips
• Flexible bead expands and contracts with substrate movement
• Adheres to a wide variety of surfaces without priming
• White finish suitable for sinks, tubs, tile, and trim applications
• 8 oz unit size for precise, targeted application

Compatibility

Designed as a general-purpose rubber sealant suitable for use on plumbing fixtures, roofing components, gutters, tile, glass, and window assemblies in residential and light commercial settings.

Installation Notes

Surface preparation is critical — clean and dry the substrate thoroughly before applying. This product is typically applied by plumbers, roofers, or general maintenance technicians. Allow adequate cure time before exposing the bead to water or mechanical stress. Follow local building codes and manufacturer ventilation guidelines when working in confined spaces.

Technical Specifications

• Net Weight: 1 pound
• Container Size: 8 oz
• Color: White
• UOM: Each
• UPC: 00855647003385

Standard Information

• Brand: FLEX SEAL
• Manufacturer Part Number: FSH8W-4