Swift Response Llc LFSBLKR01 Flex Seal Liquid 1 Gallon

Product Description

The SWIFT RESPONSE LLC LFSBLKR01 is a liquid rubber sealant coating sold in a 1-gallon container. It applies by pouring, brushing, or rolling and cures to a flexible, watertight membrane that seeps into cracks and voids to stop water intrusion. The formula is non-toxic, stays pliable after cure, and resists sagging in summer heat as well as cracking and peeling in winter cold. Plumbers, roofers, waterproofing contractors, and maintenance technicians use it where a brushable or pourable rubber barrier is required on metal, concrete, wood, or other surfaces.

The LFSBLKR01 is suited for residential and light commercial applications including roof repairs, gutters, foundations, decks, HVAC plenums, drain areas, and any surface prone to water infiltration or corrosion. It can be applied to wet or dry surfaces, making it practical for field conditions where full drying is not always possible before treatment. The black finish blends with asphalt and dark substrates commonly encountered on rooftops and mechanical equipment exteriors.

Key Features

• Pours, brushes, or rolls on for versatile application methods
• Seeps into cracks and voids to form a continuous watertight seal
• Stays flexible and pliable after cure — resists cracking in cold and sagging in heat
• Protects surfaces from corrosion and moisture-related degradation
• Dampens vibration and deadens noise on treated surfaces
• Non-toxic formula — safe for use in enclosed or occupied areas with standard ventilation precautions
• Applies to wet or dry surfaces

Compatibility

Designed as a general-purpose liquid rubber sealant suitable for use on metal, concrete, wood, roofing materials, and most other porous or non-porous surfaces requiring waterproofing or corrosion protection.

Installation Notes

Surface preparation is critical — remove loose debris, dirt, and grease before application for best adhesion. Apply with a brush, roller, or by pouring directly into the area to be sealed, working material into cracks thoroughly. Allow adequate cure time between coats and before exposing the surface to standing water; cure time will vary with temperature and humidity. Follow all applicable building and safety codes for the project type, and ensure adequate ventilation when working in confined spaces.