Top 9 Cinder Block Sealer – Hardware Sealers

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1. Rain Guard Water Sealers


Rain Guard Water Sealers CR-0205 Blok-Lok Ready to USE Sealer Covering Up to 750 Sq. Ft. on All Block Surfaces. 5 Gallon Clear Penetrating Silane and Siloxane Professional Grade.

Rain Guard Water Sealers #ad - Water-based, & made in usa. Protects against water intrusion, lime, mold, mildew, efflorescence, freeze/thaw damage, stains, spalling, and uv damage.100 percent breathable water repellent for vertical concrete, brick and masonry surfaces. Backed by FIVE year material. Dries with a natural finish that will not yellow.
BrandRain Guard Water Sealers #ad
ManufacturerRainguard International #ad
Height15 Inches
Length12 Inches
Weight48 Pounds
Width12 Inches
Part NumberCR-0205



White, KILZ Basement and Masonry Waterproofing Oil Paint, Interior/Exterior, 1 Gallon

KILZ #ad - Advanced formula: this low odor, masonry paint is formulated for waterproofing and uses nanotechnology to form a barrier to help stop water infiltration. Waterproofing paint: kilz basement & Masonry Waterproofing Paint is a premium, interior/exterior waterproofing paint designed for porous concrete and masonry surfaces.

Multiple uses: use on interior and exterior above and below grade basement walls, retaining walls, cinder and concrete blocks, stucco and brick. Not for use on floors or on walls with active water leaks. Lifetime Limited Warranty see label for details. This alkali resistant coating provides a long-lasting, durable and decorative finish. Kilz has been making premium primers and paints for 40 years and leverage this experience in every gallon of KILZ Paint.

Paint dries to touch in one hour and can be re-coated in 4 hours depending on humidity. A minimum of two coats of this product are required for optimal results. For below grade application, masonry walls, fill all holes/cracks with hydraulic cement prior to painting. Named paint brand of the year in 2015 in the Harris Poll EquiTrend  Rankings. Superior coverage: this 1 gallon can of interior/exterior basement and masonry waterproofing Paint COVERS 75-100 square feet depending on surface porosity.
BrandKILZ #ad
ManufacturerMasterchem Industries LLC (Drop Ship) #ad
Height7.8 Inches
Length7.2 Inches
Weight12.5 pounds
Width7.2 Inches
Part Number239041

3. Liquid Rubber


Indoor & Outdoor Waterproof Coating, Black, 5 Gallon, Easy to Apply, Liquid Rubber Concrete Foundation and Basement Sealant

Liquid Rubber #ad - With liquid rubber seam Tape or Liquid Rubber Geo-Textile where possible movement may occur. Safe for humans and pets alike, containing no solvents, can be used indoors and outdoors with no special breathing apparatus.

Container can be closed and left over material used later. No pot life or working time like 2 component products. Flat/ponding surface: 50 sq ft/G per coat. For a bulletproof system - bridge joints, gaps, seams, vents, protrusions…. Highly flexible - sealant final membrane has over 900% elongation in the sealing material preventing adhesion failure causing cracks and taring.

Protective finish for - foundations, deck and Fence Posts, Wood, icf's, planter Boxes, Metal, Basements, Shower Liners, Concrete and more. Easy to apply - no mixing required! apply by brush, roller or high quality piston paint sprayer. Scroll down for full application steps. Environmentally friendly - liquid rubber foundation Sealant is water based, VOC's or harmful odors.
BrandLiquid Rubber #ad
ManufacturerLiquid Rubber USA #ad
Height16 Inches
Length12 Inches
Width12 Inches
Part Number20602



AMES BWRF5 Water Base High Strength Elastomeric Liquid Rubber, 5 Gallon White

AMES #ad - Block & wall liquid rubber waterproofer will fill cracks and crevices up to ⅛ inch. Ames block & wall liquid rubber is non-toxic, environmentally friendly, low odor, and made in the USA.

Ames' block & wall liquid rubber is a specially formulated blend of adhesive, liquid rubber for waterproofing concrete walls, cinder block, high strength elastomeric, and more. Block & wall is thick, yet easy to apply and has up to 1800% elongation. Ames block & wall liquid rubber is an excellent coating for ICF insulated concrete forms, metal, concrete, wood, and many other surfaces. It is low odor and can be sprayer, roller, or brush applied. 5 gallon, white - ames block & wall is packaged in 5 gallon pails - It is high in solids and dries to a nearly impenetrable tough elastic membrane that has up to 1800% elongation to resist cracking and peeling.
BrandAMES #ad
ManufacturerAmes Research Laboratories, Inc. #ad
Height13.75 Inches
Length12 inches
Weight44 Pounds
Width12 Inches
Part NumberBWRF5

5. MasonryDefender


Exterior, Brick, Brick & Stone Sealer, Sandstone, Clear Penetrating Water Sealant for Porous, Limestone & Granite Siloxane Sealer, Cultured Stone, Concrete, All Purpose Concrete, 1 Gallon, Stone

MasonryDefender #ad - Clear, limestone, porous masonry & concrete surfaces including Concrete, Brick, Granite, Waterproofing Protection for All Exterior, cultured stone stone veneer/manufactured stone, Sandstone, Natural Stone, and More. Water-based - soap & Water Cleanup, Low Odor. 100% breathable - doesn't form a film, allows Trapped Moisture to Escape Which Prevents Pitting, Cracking & Delaminating. 5 year warranty on Vertical Concrete & Masonry Surfaces. Waterproofs and protects masonry & Concrete Surfaces from Water Damage & Freeze/Thaw Damage.
BrandMasonryDefender #ad
ManufacturerSaverSystems #ad
Weight8.56 Pounds
Part Number300602

6. DAP


DAPConcrete Watertight Filler and Sealent 10.1 ounce Gray

DAP #ad - Waterproof, weather resistant seal. Clean up before curing can be accomplished with soap and water. Contains no flammable or toxic solvents. This is manufactured in United states. 101-ounce. Provides a weather-tight seal that stays flexible, prevents ice and water damage and resists cracking. This is highly durable.
BrandDAP #ad
ManufacturerDap #ad
Height11.25 Inches
Length2 Inches
Weight1.3 Pounds
Width2 Inches
Part Number18096
WarrantyIf not satisfied with product performance when used as directed, return used container and sales receipt to DAP Products Inc., Technical Customer Service, 2400 Boston St., Suite 200, Baltimore, MD 21224, for product replacement or sales price refund. DAP will not be liable for incidental or consequential damages.

7. Red Devil


10.1 oz., Pack of 12, Red Devil 0646 Masonry and Concrete Acrylic Sealant, Gray

Red Devil #ad - Water clean up: Cleans up easily with soap and water. Seals cracks & joints: Works on concrete, stone, masonry, cinder block and brick. Textured like concrete: Blends easily with concrete and mortar. Won't stain or bleed: Mimics the look of concrete or mortar. Excellent adhesion: Provides a long lasting repair.
BrandRed Devil #ad
ManufacturerRed Devil #ad
Height12 Inches
Length6 Inches
Weight11.28 Pounds
Width8 Inches
Part Number064612

8. Liquid Rubber


Multi-Surface Leak Repair Indoor and Outdoor Coating, 5 Gallon, Easy to Apply, Barn Red, Water-Based, Liquid Rubber Color Sealant

Liquid Rubber #ad - Safe for humans and pets alike, can be used indoors and outdoors with no special breathing apparatus. Flat/ponding surfaces - 1 gallon/15 sq ft 1. 4 sq m. With liquid rubber seam Tape or Liquid Rubber Geo-Textile where possible movement may occur.

For a bulletproof system - bridge joints, gaps, vents, seams, protrusions…. Protective finish for - flat roofs, metal, metal roofs, planter boxes, basements, foundations, sheds, sloped roofs, wood, concrete and more.33-4 heavy coats to achieve a 30 mil 076 mm membrane. Coverage - vertical surfaces - 1 gallon/30 sq ft 2.

8 sq m. 4-5 heavy coats to achieve a 60-80 mil 1. 5-2 mm membrane. Highly flexible & durable - final membrane has over 1000% elongation preventing adhesion failure, and is UV Stable stopping the sun from degrading the product. Environmentally friendly - liquid rubber waterproof Sealant/Coating is water based, containing no solvents, VOC's or harmful odors.
BrandLiquid Rubber #ad
ManufacturerLiquid Rubber USA #ad
Height16 Inches
Length12 Inches
Weight45 Pounds
Width12 Inches
Part Number23065

9. Ghostshield


Masonry & Pavers, Water-Based DOT Approved Silane/Siloxane for Concrete, Siloxa-Tek 8500 Ready to Use, 1 Gallon Penetrating Concrete Sealer, Brick, Water and Salt Repellent. Clear

Ghostshield #ad - Resists wind driven rain. Will not change the aesthetics, brick and stone with its original natural appearance. This low voc formula is 100% breathable and non film forming meaning it will never peel flake or delaminate. Excellent water beading effect, easy application with sprayer, roller or brush.

Siloxa-tek 8500 is a commercial grade, impregnating sealer for commercial and residential applications. Siloxa-tek 8500 is a water-based, leaving your concrete, pavers, silane/siloxane engineered to reduce water and moisture intrusion. Its high actives formula is UV stable and will not break down from direct sunlight. If installed by certified applicator vertical applications can last up to 10 years before reapplication is required. It mitigates cracking, spalling and pitting and protects against surface degradation from freeze thaw damage.

Covers up to 250 square feet per gallon per coat. Iloxa-tek 8500 is d. O. T department of transportation approved and resists surface damage caused by chlorides and deicing salts. Siloxa-tek 8500 is a supercharged penetrating sealer with 6x higher actives than any other water based concrete sealer on the market for long lasting protection that actually last. Use on driveways, basements, garages, patios, pool decks.
BrandGhostshield #ad
ManufacturerKretetek Industries, Inc. #ad
Weight9.08 Pounds
Part Number8500