10 Best Best Hot Tub Leak Sealer of 2025

Tested and Reviewed: Top 10 Best Hot Tub Leak Sealer deals with expert ratings from 8.1 to a perfect 10

July 2025 Edition

Editor's Choice

9.7

Save 5%

Marlig Industries

Marlig Fix-A-Leak Pool and Spa Leak Sealer - 32 oz

5% OffFree Shipping

Editor's bottom line:

“This best hot tub leak sealer is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

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This item will be delivered curbside. To have the item delivered to a location of choice on your property, kindly make additional arrangements with a third party provider ahead of delivery

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Picked by 338 people today

9.5

Save 7%

Marlig Industries

Fix-A-Leak by Marlig for Swimming Pool Spa Hot Tub Leaks 32 oz,White

7% OffFree Shipping

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With pump running add FIX-A-LEAK slowly through skimmer or in front of any other suction intake.
After adding FIX-A-LEAK adjust suction to main drain. If this is not possible, the vacuum cleaner could be used alternatively, simply by placing the vacuum in deepest part of pool and connect to normal vacuum connection. Set filter valve to normal vacuum position.
FIX-A-Leak is very heavy and will sink to the lowest point rather quickly. It must be stirred back into suspension, either manually using a pool broom or mechanically with an automated pool cleaner every 4-6 hrs. during circulation of water.
After the leak has stopped and given the proper time to cure, (24-48 hrs.) you may return to normal filtration. Sand filters: Set filter valve to filter and resume normal operation. Backwash out unused FIX A-Leak as required. Other Filters: Reinstall filter into tank and Resume operation. Rinse out unused FIX-A-Leak from filter as required.*NOTE* Never let cartridges or DE elements be left to dry before they are cleaned.
Suction Leaks are usually known by air mixed with the water at the return fittings. In most cases suction lines only leak water when the filter pump is shut off. Normal Circulation will simply draw FIX-A-LEAK away from the leak and if the pump is shut off the material will simply not get to the leak.

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9.5

Save 17%

MAV AquaDoc

Hot Tub Leak Sealer to Fix Leaks Easily - Spa Leak Sealer 16oz, Advanced Spa Repair Chemical Made in the USA - AquaDoc

17% OffFree Shipping

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Can't Find a Leak in your Spa or Hot tub? AquaDoc's advanced spa fix a leak sealer helps find and stop leaks - even if you can't find the water leak on your own. Seal a leak for hot tub or spas fast with our hot tub leak sealer.
Stop leaks within 24 Hours - With our Hot Tub Leak sealant, you can fix a leak for hottubs and spas quickly. Our spa leak sealer & hot tub leak seal works fast to seal minor hot tub leaks. Making a spa leak stop has never been faster.
Hot Tub Crack Repair Kit - Repair spa leaks without having to drain your water. If you own a hot tub stop leak sealing by draining water first. With our hot tub stop leak formula, you can seal water leaks while the tub is full.
The only Fix a Leak Seal Kit you Need - With AquaDoc's hot tub sealant, there's no need for spa sealant tools or extra hot tub sealing kits. Our hot tub liquid sealant formula works alone to help seal minor cracks and leaks in your spa or hot tub.

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9.2

Lo-Chlor

Lo-Chlor Leak Sealer - No Need to Drain Pool Water, Easily Fix a Leak Pool Leak Sealer - Hot Tub Leak Sealer Works in 24 Hours to Fix a Leak Spa and Hot Tub, Fast Acting Pool Leak Repair (32oz)

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Fast-Acting Leak Repair Solution: With Leak Sealer, leaks are sealed within 24 hours. Fix a leak in your pool or spa with this quick fix pipe leak sealant that provides fast results.
Seal Minor Pool and Spa Leaks Quickly: Lo-Chlor Leak Sealer works fast to stop leaks in pools and spas losing up to 1" of water per day, saving you time and costly repairs. Ideal for minor leak fix
No Need to Drain Water: This pool leak sealer saves water by fixing leaks without draining your pool or hot tub, making it a simple and eco-friendly leak repair solution.
Cost-Effective Leak Detection & Repair: Stop leak costs by sealing pool and spa leaks for a fraction of typical repair service expenses. Just pour into your pool or spa to fix leaks and save money.
Versatile Leak Sealer for Pools and Spas: Perfect for above ground pool leak sealer, hot tub leak sealer, and spa leak. Highly concentrated, one quart is sufficient to treat a 15,000 gallon pool.

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9.0

SpaChoice

SpaChoice 1-Pint Premium Seal A Leak, Hot Tub Leak Sealer, Made in USA

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Recommended for the repair of minor leaks and cracks in spas
1 ounce per 500 gallons of water
If the leak location is unknown, add the recommended dosage to the skimmer
If you are sure of the location of the leak, pour the recommended dosage directly into the water at the area of the leak

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8.8

Bespoke+

Need to Fix a Leak? Use The Ultimate Spa Leak Sealer for Spa Leak Repair - This Hot Tub Leak Sealant Works for Minor Cracks and Spa Leaks - Stop Leaks Fast with This Leak Sealer - No Puddy Needed

Free Shipping

Main Highlights

Advanced Formula for Effective Leak Sealing: Our Bespoke+ Leak Sealer features an advanced formula designed to tackle and seal leaks in spas and hot tubs. Whether it's a crack, gap, or small leak, our liquid sealant is here to fix that spa leak.
Seals Different Spa Surfaces: Works on various spa surfaces, including acrylic, fiberglass, and other common spa and hot tub surfaces. This versatile leak sealer works seamlessly, ensuring a watertight seal to stop leaks and prevent water loss.
No leak finder needed: Fixing leaks has never been easier! With Bespoke+ Leak Sealer, you can quickly and effortlessly fix leaks in your spa or hot tub. Simply add the leak sealing solution and it will find the leak & seal it.
Trusted by Professionals and Enthusiasts: Bespoke+ Leak Sealer is a trusted choice among professionals and spa enthusiasts. Its reliable performance and proven effectiveness make it the go to for fixing a leak.
Say Goodbye to Spa Leaks: Don't let leaks dampen your spa or hot tub experience. With Bespoke+ Leak Sealer, you can seal cracks effectively, and enjoy uninterrupted relaxation in your spa or hot tub.

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8.6

Marlig Industries

Marlig Industries Seal Marlig Fix Pool and Spa Leak Sealer-8 oz

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Designed to fix leaks for Pools, Spas, & Hot Tubs in virtually any material
Will permanently seal holes up to 1/8" in diameter
Use 8 oz per 1,000 gallons for minor leaks. A second bottle can be added for larger leaks
Country of Origin: USA

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8.3

Spa Depot

Spa Bond Hot Tub & Pool Leak Seal Patch Kit - Clear Ultra-Adhesive Waterproof Repair Fix for Vinyl, PVC, Acrylic

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PVC Pipe leak repair - conforms to any shape
Vinyl liner - spa cover tear repair - ultra adhesive bond - no messy liquids
Seals cracks in spa shell - even large holes
(2) 2"x2" and (2) 4"x4" Clear Patches (four total)
Just peel & stick for a perfect leak repair - Made in USA

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Best Value

8.1

Save 22%

Marlig Industries

Marlig Industries Fix A Leak Pool Leak Sealer - 8 oz

22% OffFree Shipping

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Brand: Marlig Industries
Country Of Origin: United States
Is Assembly Reqyuired: False
Size: 8 oz

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8.1

J-B Weld

J-B Weld 8277 WaterWeld Epoxy Putty Stick - 2 oz., Off White

Free Shipping

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J-B WELD WATERWELD: A hand mixable two part epoxy putty stick, that can cure under water and is ideal for repairing plumbing, fuel tanks, tubs and showers, drains, pool and spa, boats & potable water tanks and more! J-B Weld WaterWeld is certified by the NSF and is safe for contact with potable water.
CURE AND SET TIME: After kneading the two part formula together by hand, WaterWeld takes 25 minutes to set and cures in 1 hour. J-B Weld WaterWeld set and cure color is off white.
PRODUCT FEATURES AND STRENGTH: J-B Weld WaterWeld has lap shear strength of 1300 PSI, can withstand continuous temperatures up to 300F (149C) and intermittent temperatures of 350F (176 degrees Celsius) and is chemical resistant against petroleum, hydraulic fluids and other chemicals when fully cured.
SURFACE APPLICATIONS: Iron & Stainless Steel, Copper & Brass, Aluminum & Bronze, Fiberglass and Plastic & PVC.
DO IT YOURSELF: Big or small, you can DIY it with J-B Weld. Our heavy duty epoxy and adhesives repair & restore it right the first time. J-B Weld delivers superior performance, quality, and results for the Worlds Strongest Bond.

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Our Best Overall Choice

Best Choice

9.7

Marlig Industries

Marlig Fix-A-Leak Pool and Spa Leak Sealer - 32 oz

5% OffFree Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

This item will be delivered curbside. To have the item delivered to a location of choice on your property, kindly make additional arrangements with a third party provider ahead of delivery

Show Price

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Pool Leak Detection Dye Kit - with 2 Precision Applicators - Made in USA - Superior Long Lasting Pool Dye Easily Locates Leaks - for All Pool, Spa, & Hot Tub Types - 8 OZ Vibrant Blue

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10 Best Best Hot Tub Leak Sealer of 2025

Tested and Reviewed: Top 10 Best Hot Tub Leak Sealer deals with expert ratings from 8.1 to a perfect 10

Marlig Industries

Marlig Fix-A-Leak Pool and Spa Leak Sealer - 32 oz

Editor's bottom line:

Main Highlights

Marlig Industries

Fix-A-Leak by Marlig for Swimming Pool Spa Hot Tub Leaks 32 oz,White

Main Highlights

MAV AquaDoc

Hot Tub Leak Sealer to Fix Leaks Easily - Spa Leak Sealer 16oz, Advanced Spa Repair Chemical Made in the USA - AquaDoc

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Lo-Chlor

Lo-Chlor Leak Sealer - No Need to Drain Pool Water, Easily Fix a Leak Pool Leak Sealer - Hot Tub Leak Sealer Works in 24 Hours to Fix a Leak Spa and Hot Tub, Fast Acting Pool Leak Repair (32oz)

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SpaChoice

SpaChoice 1-Pint Premium Seal A Leak, Hot Tub Leak Sealer, Made in USA

Main Highlights

Bespoke+

Need to Fix a Leak? Use The Ultimate Spa Leak Sealer for Spa Leak Repair - This Hot Tub Leak Sealant Works for Minor Cracks and Spa Leaks - Stop Leaks Fast with This Leak Sealer - No Puddy Needed

Main Highlights

Marlig Industries

Marlig Industries Seal Marlig Fix Pool and Spa Leak Sealer-8 oz

Main Highlights

Spa Depot

Spa Bond Hot Tub & Pool Leak Seal Patch Kit - Clear Ultra-Adhesive Waterproof Repair Fix for Vinyl, PVC, Acrylic

Main Highlights

Marlig Industries

Marlig Industries Fix A Leak Pool Leak Sealer - 8 oz

Main Highlights

J-B Weld

J-B Weld 8277 WaterWeld Epoxy Putty Stick - 2 oz., Off White

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Our Best Overall Choice

Marlig Industries

Marlig Fix-A-Leak Pool and Spa Leak Sealer - 32 oz

Editor's bottom line:

Main Highlights

Related Deals You Might Like for Best Hot Tub Leak Sealer

LeakShot Pool and Spa Leak Sealer, Seals Leaks in Pools, Spas and Fountains, 32 oz., Fix a Leak Spa and Hot Tub, Easy to Use

SpaChoice 1-Pint 2-Pack Premium Seal A Leak, Hot Tub Leak Sealer, Made in USA

Marlig Industries Fix Pool Leak Sealer-8 oz (Twо Pаck)

Marlig Fix-A-Leak Pool and Spa Leak Sealer 8 oz - 2 Pack

Glow Leak New UV Hot Tub Leak Detection Kit Easy-to-Use Water Leak Locator for Hot Tubs and Spas (Neon Green) (Neon Red)

2-Pack Boss 802 Clear Pro Grade Silicone Sealant for Pool, spa, Household - 2 x 280ML. Tubes

for Marlig Fix-A-Leak for Pool Spa Hot Tub Leak Sealer Repair Liquid FIXALEAK 8oz

Epoxybond Pool Putty 2-Part Set | Swimming Pool & Spa Repair | Easy DIY | Fix Cracks Leaks Underwater or Above | Concrete, Fiberglass & Variety of Other Surfaces | by Atlas Minerals

Pool Leak Detection Dye Kit - with 2 Precision Applicators - Made in USA - Superior Long Lasting Pool Dye Easily Locates Leaks - for All Pool, Spa, & Hot Tub Types - 8 OZ Vibrant Blue

Leakmaster Pool Leak Detection Kit – 8 oz Blue Dye with Reusable Syringe – High-Visibility Leak Finder for Pools, Hot Tubs & Spas – 40+ Refills– Professional Water Tracing Tool

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