10 Best Basement Waterproofing Paint of December 2025

• This premium, interior/exterior paint is formulated to waterproof and seal porous concrete and masonry surfaces both inside and outside your home.
• Using nanotechnology, this paint forms a barrier to help stop water infiltration while an alkali resistant coating provides a long-lasting, durable and decorative finish.
• Apply this paint on properly prepped and cured above and below grade basement walls, masonry walls, retaining walls, cinder and concrete blocks, stucco and brick. Do not use on floors or on walls with active water leaks.
• Prime all uncoated, patched, chalky, and adjacent wood and/or metal surfaces with KILZ Premium Primer. For below grade application, fill all holes/cracks with hydraulic cement prior to painting.
• This is a 1-gallon can of Interior/Exterior Basement and Masonry Waterproofing Paint, White, 1-gallon in white. Depending on surface porosity, 1 gallon covers 75 to 125 square feet per.
• A minimum of two coats of this product are required for optimal results. Paint dries to touch in one hour and can be re-coated in 4 hours depending on humidity.
• Apply using a high quality 1/2"-3/4" nap roller, 4" nylon/polyester brush or an airless sprayer capable of delivering 2200-3200 PSI or greater using a .023"-.025" spray tip.
• KILZ has been making premium primers and paints for 40 years. KILZ was named Paint Brand of the Year in 2015 in the Harris Poll EquiTrend  Rankings.

Kilz

• MasterSeal 583 Formerly Super Thoroseal Waterproof Coating
• Harder than the wall itself
• This Product is manufactured in United States

MasterSeal

• Flex Seal Liquid is liquid rubber in a can! Now you can brush, roll, dip or pour it on!
• Use anywhere you need a watertight, flexible rubberized coating
• Goes on smooth and covers fast, sealing out water, air and moisture
• Non-hazardous, non-toxic, non-flammable, UV-resistant. Even safe for plants and animals once cured
• Prevents rust and corrosion. Mildew and chemical resistant

Flex Seal Liquid

• PROTECTIVE FINISH FOR - Flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, metal, wood, concrete and more
• HIGHLY FLEXIBLE & DURABLE - Final membrane has over 1000% elongation preventing adhesion failure, and is UV Stable stopping the sun from degrading the product
• COVERAGE - Vertical Surfaces - 1 gallon/30 sq ft (2.8 sq m). 3-4 heavy coats to achieve a 30 mil (0.76 mm) membrane. Flat/Ponding Surfaces - 1 gallon/15 sq ft (1.4 sq m). 4-5 heavy coats to achieve a 60-80 mil (1.5-2 mm) membrane
• ENVIRONMENTALLY FRIENDLY - Liquid Rubber Waterproof Sealant/Coating is water based, containing no solvents, VOC's or harmful odors. Safe for humans and pets alike, can be used indoors and outdoors with no special breathing apparatus
• FOR A BULLETPROOF SYSTEM - Bridge joints, seams, vents, gaps, protrusions…. With Liquid Rubber Seam Tape or Liquid Rubber Geo-Textile where possible movement may occur

L R

• Weather and corrosion resistant coating protects exterior/interior surfaces like wood, metal, concrete, masonry and more
• Oil-based formula provides a durable protective coating with excellent rust prevention
• Dries to the touch in 2-4 hours and covers up to 90 sq. ft.
• Excellent resistance to abrasion, fading and chipping
• Glossy finish provides a fresh shine to surfaces
• Superior Coverage
• Superior Durability
• Excellent chip resistance
• Resists fading
• This item is not for sale in Catalina Island

Rust-Oleum

• Penetrates Concrete (up to 4") – Internally Seals the Matrix of Concrete, Blocking the Pores and Capillaries to Prevent Water Seepage, Water Vapor, and Radon Gas. Ideal for use on basement floors, interior basement walls, foundation walls, slab-on-grade, indoor and outdoor poured concrete slabs and walls.
• Hardens & Strengthens Concrete – Helps to Protect Against and Reduce Concrete Dusting, Efflorescence, Damage Caused by Salts, De-Icing Chemicals, and Freeze Thaw. Does Not Trap Moisture.
• ECO-Friendly & Easy to Apply Formula – ZERO VOCs, No Odors, No Solvents, Non-Toxic, Non-Flammable. Water-based.
• Permanent & Paintable – No Reapplication Needed. Resistant to Hydrostatic Water Pressure. Does Not Form a Surface Film. No Peeling or Fading. Leaves Surface Paintable. Great Primer for Epoxies, Tiles, and Overlay Flooring.
• Commercial-Grade Backed by a Money-Back Guarantee - Trusted Since 1997

RadonSeal

• Solar Reflectance Up to 98%
• Solvent: Water
• Permeability: .016 perm rating with 10 mils/min. of coating
• Elongation: Up to 700%
• Strength: 250 PSI

AMES

• Water Based mold and mildew resistant coating for interior and exterior concrete walls. Great for basement walls, foundations and retaining walls.
• Fast Drying waterproof paint for interior/exterior basement walls, cinder blocks, stucco and brick, and masonry.
• High alkali resistance – up to pH-13.
• Waterproofing paint keeps basement walls dry, and provides a mildew resistant coating
• Paint only when surface and air temperatures are between 50 ° (10 °C) and 90 °F (32.2 °C).
• Withstands up to 12 psi hydrostatic pressure.
• Before painting, review the INSL-X Waterblock label for proper preparation and application tips.

INSL-X

• PROTECTIVE FINISH FOR - Foundations, ICF's, Basements, Shower Liners, Deck and Fence Posts, Planter Boxes, Metal, Wood, Concrete and more
• HIGHLY FLEXIBLE - Sealant final membrane has over 900% elongation in the sealing material preventing adhesion failure causing cracks and taring. Flat/Ponding Surface: 50 sq ft/G per coat
• EASY TO APPLY - No mixing required! Apply by brush, roller or high quality piston paint sprayer. Container can be closed and left over material used later. No pot life or working time like 2 component products
• ENVIRONMENTALLY FRIENDLY - Liquid Rubber Foundation Sealant is water based, containing no solvents, VOC's or harmful odors. Safe for humans and pets alike, can be used indoors and outdoors with no special breathing apparatus
• FOR A BULLETPROOF SYSTEM - Bridge joints, seams, vents, gaps, protrusions…. With Liquid Rubber Seam Tape or Liquid Rubber Geo-Textile where possible movement may occur

L R

• Latex-Base Mold and Mildew-Proof Waterproofing Paint
• Guaranteed to stop water- resists up to 20-Pound of water pressure
• Very smooth, bright white, non-gritty finish applies easily to dry walls with brush or roller
• Ultra low odor, easy soap and water clean-up
• Backed by two guarantees: 15 year waterproof and 5 year mold and mildew-proof paint film

Rust-Oleum