Black Net Wt. 14 oz. - Flex Seal

Part #: FSR20

The Flex Seal FSR20 Black Net Wt. 14 oz. is a professional-grade rubberized sealant engineered for demanding automotive and industrial applications. This robust formula provides a durable, waterproof, and flexible coating, essential for technicians requiring reliable sealing and protection against moisture, corrosion, and vibrations across various surfaces.

Key Features

  • Durable Rubberized Coating: Forms a strong, flexible, and waterproof barrier that resists cracking and peeling, even under extreme conditions.
  • Leak and Crack Sealing: Effectively seals leaks and cracks on a wide range of materials, including metal, plastic, PVC, concrete, and masonry.
  • Corrosion and Impact Protection: Provides a protective layer against rust, corrosion, and minor impacts, extending the lifespan of treated components.
  • Temperature and Weather Resistant: Engineered to withstand harsh environmental factors, including extreme temperatures, UV exposure, and chemicals.
  • Professional Black Finish: Dries to a consistent black finish, suitable for exposed applications where aesthetics are important.
  • Versatile Adhesion: Adheres securely to multiple substrates, making it a versatile solution for diverse repair and maintenance tasks.

Applications

The Flex Seal FSR20 is an invaluable tool for professional technicians across numerous fields. It is ideal for sealing leaky automotive pipes, repairing damaged roofs on vehicles or industrial buildings, and waterproofing electrical connections to prevent shorts and corrosion. This sealant can also be effectively used for coating undercarriages in automotive applications for rust prevention and sound deadening, or for sealing seams in HVAC systems and industrial machinery. Common uses extend to marine maintenance, general facility upkeep, and heavy equipment repair where a durable, flexible, and waterproof seal is critical.

We have 225 in stock

$14.99

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  • Model: 474075
  • Shipping Weight: 1.26lbs
  • UPC: 00108556470030
  • Manufacturers Part #: FSR20
  • Manufactured by: Flex Seal
  • Also Known As: FLX-FSR20

This product was added to our catalog on Tuesday 30 June, 2026.

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