Best Water Sealers for Basement Updated May 2025
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Best Water Sealers for Basement
2025 Buyer's GuideUpdated May 2025
Advertiser disclosure About our rankings
Sort by:
Best Overall
Premium Pick

9.9

1

9.9

RadonSeal Standard Deep-Penetrating Concrete Sealer - Basement Waterproofing & Radon Mitigation - 5 Gals
Ease of application
Functionality
Sealability
Scrubbing ability
Quality
Odor
Best Overall
Premium Pick

9.9

1
RadonSeal Standard Deep-Penetrating Concrete Sealer - Basement Waterproofing & Radon Mitigation - 5 Gals
Ease of application
Functionality
Sealability
Scrubbing ability
Quality
Odor
Popular

9.7

2

9.7

Aquastrong Sump Pump 1 HP 4500 GPH Submersible Water Pump Thermoplastic Portable Utility Pump High Flow Water Removal for Swimm...
Works well
Pump quality
Water drain
Value for money
Ease of use
Noise level
Save 13% + 5% Coupon
Save 13% + 5% Coupon
Popular

9.7

2
Aquastrong Sump Pump 1 HP 4500 GPH Submersible Water Pump Thermoplastic Portable Utility Pump High Flow Water Removal for Swimm...
Works well
Pump quality
Water drain
Value for money
Ease of use
Noise level
Save 13% + 5% Coupon

9.6

3

9.6

Flex Seal Liquid, 16 oz, Clear, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair,...
Works great
Ease of application
Sealability
Durability
Waterproof

9.6

3
Flex Seal Liquid, 16 oz, Clear, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair,...
Works great
Ease of application
Sealability
Durability
Waterproof

9.4

4

9.4

Applied Technologies 6-10' Fast Set Concrete Foundation Crack Repair Kit - Hydra Stop 300 Polyurethane Foam for Wall Cracks, Pr...
Functionality
Ease of use
Leak prevention
Crack repair
Kit quality

9.4

4
Applied Technologies 6-10' Fast Set Concrete Foundation Crack Repair Kit - Hydra Stop 300 Polyurethane Foam for Wall Cracks, Pr...
Functionality
Ease of use
Leak prevention
Crack repair
Kit quality

9.3

5

9.3

Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor ...
Functionality
Ease of application
Water resistance
Durability
Value for money
Sealant

9.3

5
Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor ...
Functionality
Ease of application
Water resistance
Durability
Value for money
Sealant

9.1

6

9.1

RadonSeal Plus Deep-Penetrating Concrete Sealer, Basement Waterproofing & Radon Mitigation (2.5-Gallon)
Effectiveness
Ease of application
Odor
Cleanliness
Concrete hardness
Moisture barrier

9.1

6
RadonSeal Plus Deep-Penetrating Concrete Sealer, Basement Waterproofing & Radon Mitigation (2.5-Gallon)
Effectiveness
Ease of application
Odor
Cleanliness
Concrete hardness
Moisture barrier

9.0

7

9.0

KILZ Basement and Masonry Waterproofing Paint, Interior/Exterior, White, 1 Gallon
Quality
Coverage
Paint quality
Ease of application
Water resistance
Value for money

9.0

7
KILZ Basement and Masonry Waterproofing Paint, Interior/Exterior, White, 1 Gallon
Quality
Coverage
Paint quality
Ease of application
Water resistance
Value for money

8.8

8

8.8

Ames Block & Wall™ Liquid Rubber Waterproofer Multi-Purpose Coating & Sealant - 1 Gallon - Perfect to Use As Concrete Sealer an...
Functionality
Water resistance
Ease of application
Smell
Look
Durability
Save 21%
Save 21%

8.8

8
Ames Block & Wall™ Liquid Rubber Waterproofer Multi-Purpose Coating & Sealant - 1 Gallon - Perfect to Use As Concrete Sealer an...
Functionality
Water resistance
Ease of application
Smell
Look
Durability
Save 21%
Best Value

8.7

9

8.7

Thompson’s WaterSeal Multi-Surface Waterproofer Stain, Clear, 1 Gallon
Works well
Water seal
Ease of application
Best Value

8.7

9
Thompson’s WaterSeal Multi-Surface Waterproofer Stain, Clear, 1 Gallon
Works well
Water seal
Ease of application

8.5

10

8.5

Flex Seal Liquid, 32 oz, Gray, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, ...
Works well
Leak resistance
Ease of application
Color match

8.5

10
Flex Seal Liquid, 32 oz, Gray, Liquid Rubber Coating Sealant, Waterproof, Flexible, Breathable, and UV Resistant, Roof Repair, ...
Works well
Leak resistance
Ease of application
Color match

Our Top Choice

Best Overall
Premium Pick

9.9

1

9.9

RadonSeal Standard Deep-Penetrating Concrete Sealer - Basement Waterproofing & Radon Mitigation - 5 Gals
Ease of application
Functionality
Sealability
Scrubbing ability
Quality
Odor
Best Overall
Premium Pick

9.9

1
RadonSeal Standard Deep-Penetrating Concrete Sealer - Basement Waterproofing & Radon Mitigation - 5 Gals
Ease of application
Functionality
Sealability
Scrubbing ability
Quality
Odor
Related Categories
Water Sealer for ConcreteConcrete SealerConcrete Patio SealerConcrete Sealer for DrivewayFoundation Crack RepairDeck Sealer
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Related Categories
Water Sealer for ConcreteConcrete SealerConcrete Patio SealerConcrete Sealer for DrivewayFoundation Crack RepairDeck Sealer
Related Categories
Water Sealer for ConcreteConcrete SealerConcrete Patio SealerConcrete Sealer for DrivewayFoundation Crack RepairDeck Sealer