Liquid Rubber Waterproof Sealant – Flexible, Water-Based Leak Repair Coating for Roofs & Foundations (1 Gallon, Black)

Overview

Liquid Rubber Waterproof Sealant delivers a versatile, water-based coating engineered to form a seamless, flexible membrane that protects surfaces from water intrusion. It is designed for flat roofs, metal roofs, low-slope surfaces, foundations, gutters, concrete, planters, and more, offering a practical alternative to traditional tar or patch products.

The formula stays tough as your building shifts, blends with temperature changes, and resists UV exposure. With an elongation rate well over 950%, the coating remains capable of moving with the substrate while staying adhered, reducing the likelihood of cracks or peeling over time.

Key benefits at a glance

• Industrial strength bitumen foundation creates a seamless waterproof barrier on a wide range of surfaces.
• Remarkable flexibility (950%+ elongation) helps maintain adhesion through movement and temperature shifts.
• Water-based formula with no VOCs and low odor, suitable for indoor and outdoor projects.
• Brush, roll, or spray application supports versatile project approaches and professional-looking results.

Ideal application scenarios

• Flat roofs, metal roofs, and other low-slope or standing-water surfaces.
• Foundations, basements, gutters, concrete surfaces, and planter boxes.
• Preventative maintenance as well as targeted leak repairs to protect vulnerable areas.

Complete system notes

For maximum protection, pair with Liquid Rubber Seam Tape or Geo-Textile to bridge joints, seams, vents, and protrusions where movement may occur. This approach helps create a cohesive waterproofing system for longer-lasting leak prevention on roofs or foundations.

Usage guidance

• Apply by brush, roller, or spray; adjust coat thickness to achieve the desired membrane depth.
• Not intended for heavy foot traffic or walking surfaces; use where protection is needed without daily wear.

With millions of gallons sold, Liquid Rubber has become a trusted option for professionals, property managers, and DIY enthusiasts tackling roof repairs, basement waterproofing, and exterior sealing projects. The formula aims to deliver a durable, flexible layer that adapts to your project needs without harsh solvents or strong odors.