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Home Pools Pool Maintenance Find & Patch Immediately: Best Pool Leak Detection Kits & Sealers

Find & Patch Immediately: Best Pool Leak Detection Kits & Sealers

Best pool leak detection kits and sealers reviewed by Peter Rossi, a hot tub designer with 10+ years of experience. Find them all in our article.
Pool leak detection

Pool maintenance is a complex process that requires level balancing, regular garbage collection, and so on. However, even with outstanding care, force majeure situations can occur. One of these is water leakage.

At first glance, it may seem that finding and fixing a leak is easy. However, it can be tiny (less than 5 inches) or pass water very slowly. In this case, you may need pool leak detection services. However, the cost of pool leak services can reach $500. It is pricey!

If you want to save a few hundred dollars, you can use kits for detecting pool leaks. Therefore, to help you find the one that suits you best, we’ve gathered four leak dye testers and, as a bonus, two pool leak patching products. Also, we have described signs that can lead to a leak. Let’s get started!

💡 Note:
Before choosing pool leak detection kits, you should learn how to find a leak in a pool. We have collected everything you need in this article.

Best Pool Leak Detection Kits & Sealers

Pool Leak Detection Kits

Leakmaster Pool Leak Detection

Winner in the category:
The highest efficiency
Characteristics
Amazon rating: ⭐️ 4.2
Volume: 8 oz bottle (40 refills of a syringe)
Kit: refill bottle and syringe with a 6" needle
Color: blue

What makes it the best

The most effective – allows you to find leaks due to the visible blue color of the dye and its ability to penetrate the gap or hole;

The safest elimination – fully disappears in water with no residue remaining due to its biodegradability;

The most convenient filling of the tester – allows you to fill the syringe without spilling dye;

Works for chlorinated water – high chemical resistance and highly-concentrated dye formula;

Everything you need is at hand – a syringe with a needle presented in a kit.

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Anderson Dye Tester Pre-Filled

Winner in the category
The best in finding small holes
Characteristics
Amazon rating: ⭐️ 4.4
Volume: 0.2 oz
Kit: syringe with a 6" needle
Color: ‎fluorescent-yellow

What makes it the best

The best in finding small holes – 60% of users report that the liquid penetrates even the smallest gaps (< 5 inches) which is 3 times more than other dye testers;

The longest lingering in the place of application – the concentrated liquid lingering in water for a long time;

The best for finding holes in corners and shadows – the fluorescent dye absorbs light and glow;

Convenient use – allows you to apply dye accurately without spraying it over a large area due to the 6-inch needle;

As many as you need – the convenient volume of one syringe.

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Leakmaster Pool Leak Detection Kit

Winner in the category
The most extensive kit
Characteristics
Amazon rating: ⭐️ 4.1
Volume: 8 oz bottle (40 refills of a syringe) and 4.6 oz putty
Kit: refill bottle, syringe with a 6" needle, pool putty, and instructional step-by-step DIY
videos for mixing & applying epoxy
Color: ‎fluorescent-yellow

What makes it the best

The most extensive kit – allows you to fill each syringe up to 40 times, find the hole, and immediately fix it with putty due to an 8 oz refill bottle;

The most noticeable dye – easily spot dye due to its fluorescent-yellow color;

The most self-sufficient putty – both the resin and hardener in one stick are presented in one stick;

Versatile putty appearance – allows you to easily paint the putty over with any color due to it becoming white after hardening;

Ease of use – instructions for applying the putty are presented in the kit.

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Anderson Refill Leak Tester

Winner in the category
The most economical use
Characteristics
Amazon rating: ⭐️ 4.2
Volume: 8 oz bottle (43 refills of a syringe)
Kit: refill bottle
Color: ‎fluorescent-blue

What makes it the best

The most economical use – one refill bottle is enough to fill the syringe up to 43 times, which is on 3 tests more than the similar leak finder has;

The best for finding skimmer leaks – blue fluorescent dye is easy to spot even in a dark skimmer due to its glowing;

The best for finding slow leaks – the concentrated blue dye that can linger for a long time;

Universal use – allows you to find small leaks in the vinyl coating due to its fluidity;

Safe for the skin – can be easily washed off with plain water.

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Pool Leak Patching Kits

Marlig Pool Leak Sealer

Winner in the category
The best leak patching
Characteristics
Amazon rating: ⭐️ 4.1
Volume: 32 oz bottle
Type: Sealer
Hardening rate: 48 hours

What makes it the best

The best leak patching – allows fixing leaks in all types of materials and surfaces due to the liquid sealant can penetrate cracks of any size;

The most enduring result – users point out that they have no leaks for a minimum of 4 weeks;

The largest amount of sealant – allows fixing leaks in a 22,000-gallon pool;

Detailed instructions – step-by-step instructions are provided on the official website of the manufacturer;

Safe sealant – does not harm salt chlorine generators, heaters, pumps, or filters.

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Epoxybond Pool Putty

Winner in the category
The most universal
Characteristics
Amazon rating: ⭐️ 4.6
Volume: 14.1 oz
Type: Sealer
Hardening rate: 1.5 hour

What makes it the best

The most versatile – pool putty is designed specifically to fix cracks under and above water, as it is waterproof;

The easiest to use – the resin and hardener are presented in one kit;

The fastest hardening – the mixture hardens in 1.5 hours;

Easy to mix – you can easily mix the resin and hardener due to their clay-like consistency;

Temperature-resistant – can withstand temperatures up to 200°F.

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6 Signs Which Can Lead to Pool Leakage

6 Signs Which Can Lead to Pool Leakage

Every problem has its harbingers. Pool leakage also has some signs. You should check them once a week to ensure your pool is not losing water.

  1. Crack. Every visible crack passes through water. If you notice this, check it with the pool leakage DYE tester.
  2. Water level. Evaporation and splashes are the general causes of pool water loss. Of course, weather changes or the pool use intensity can significantly change the water level indicator. However, you should still measure and average it. In this case, you can determine the deviation from the norm. The expected water loss per day is 1/4″ or 1.75″ per week.
  3. Automatic water supply system. Continuous operation of the water supply system may be a leak sign.
  4. Air in the system. The pool return system supplies water from the filter back to the jets. Often, it is from PVC. This material can deteriorate and begin to let air through. Therefore, if you see bubbles coming out of the return system, you should check it for a leak.
  5. pH level. Changing the water level changes the ratio of particles. Therefore, the pH level can fluctuate. It is another pool leakage sign.
  6. Wet spots. Their occurrence around the pool is evident because the water splashes when you swim. However, what if you didn’t use it but spots appeared? In such a case, you should check the pool for leaks.
💡 Note:
To monitor the pH levels in the pool, you need to use test kits. Find the best ones in our article.

Top 4 Swimming Pool Leak Detection Kits

Have you identified one of the signs of a pool leak? Now it’s time to find this problem! Next, we have collected four of the best pool leak detectors that will allow you to easily find a leak. Moreover, each of them has distinctive features that will help you choose a detector more accurately.

💡 Note:
After choosing a DYE tester, you will need to read the detailed guide on how to find pool leakage to find out all the pitfalls of this process.

Leakmaster Pool Leak Detection – the highest efficiency

The highest efficiency

CharacteristicsAmazon rating: 4.2 ⭐️
Volume: 8 oz bottle (40 refills of a syringe)
Kit: refill bottle and syringe with a 6″ needle
Color: blue

Leakmaster Pool Leak Detection is the DYE tester with the highest efficiency. Five out of eight users (62.5%) report that this product helped them detect a leak in a pool. It is 12.5% more than the Leakmaster Pool Leak Detection Kit.

This pool leakage detector is a highly concentrated dye. Thus, after you spray it in water, it stays in the form of a cloud and does not dissolve. Moreover, even highly chlorinated water will not interfere with leak detection. The dye is resistant to chemicals.

However, you don’t have to worry about sediment or slime in the water. This product is biodegradable. Therefore, after a while, there will be no trace of dye in your pool.

Also, the Leakmaster Pool Leak Detection comes with a syringe and a 6″ needle that will allow you to apply the dye directly to the suspected leak and control its loss. The good news is that the 8 oz refill bottle will bring up to 40 syringe refills. Therefore, users note that the dye is enough for several years of use.

Verdict:
Leakmaster Pool Leak Detection is the best efficiency and high volume. It is suitable for those who need to inspect the pool for many leaks because they can perform the procedure many times due to 40 syringe refills. However, if you need to purchase a one-time solution, it is better not to spend extra dollars and buy a pre-filled syringe.

Pros

  • The most convenient filling of the tester – fill the syringe without spilling dye due to a hinged lid with a narrow hole;
  • Works for chlorinated water – highly chlorinated water won’t make it difficult to find a leak due to the chemical resistance and highly-concentrated dye formula;
  • Everything you need is at hand – allows you to pinpoint leaks and not waste too much dye due to a syringe with a needle presented in a kit.

Cons

  • The dye may stain your hands due to the concentrated formula. However, you can wash it off with running water.

Anderson Dye Tester Pre-Filled – the best in finding small holes

The best in finding small holes

CharacteristicsAmazon rating: 4.4 ⭐️
Volume: 0.2 oz 
Kit: syringe with a 6″ needle
Color: ‎fluorescent-yellow

The Anderson Dye Tester Pre-Filled is the best for finding small holes. Three out of five surveyed users (60%) noted it, which is three times more than the Anderson Refill Leak Tester. It is because this tester is easy to use:

  • First, the kit consists of a syringe and a 6″ needle, which makes it easy to use the tester. Thus, you can apply the exact amount of product next to the suspected leak.
  • Secondly, unlike Anderson Refill Leak Tester, Anderson Dye Tester Pre-Filled is a yellow fluorescent dye. Users note that this color is easier to see in water than blue because the water is also blue. Also, it absorbs sunlight and is capable of glowing under light rays. This way, you won’t lose sight of the dye.
  • Thirdly, you immediately receive a pre-filled syringe with dye. Therefore, you can proceed to the leak detection immediately after receiving it.
Verdict:
The Anderson Dye Tester Pre-Filled is perfect for finding a few small leaks. However, if you suspect that the process may take more time and effort, it is better to purchase a refill bottle to save about $195.

Pros

  • The longest lingering in the place of application – allows you to find holes in a larger area of ​​application due to the concentrated liquid lingering in water for a long time;
  • The best for finding holes in corners and shadows – allows you to detect cracks in dark places due to fluorescent dye that absorbs light and glow;
  • As many as you need – allows you to save money and not buy the whole bottle when only one leak is needed to detect due to the convenient volume of one syringe.

Cons

  • 40% of respondents noted that one syringe is not enough to find a leak. Therefore, you may have to buy more than one item.

Leakmaster Pool Leak Detection Kit – the most extensive kit

The most extensive kit

CharacteristicsAmazon rating: 4.1 ⭐️
Volume: 8 oz bottle (40 refills of a syringe) and 4.6 oz putty
Kit: refill bottle, syringe with a 6″ needle, pool putty, and instructional step-by-step DIY videos for mixing & applying epoxy
Color: ‎fluorescent-yellow

Leakmaster Pool Leak Detection Kit is a unique product that offers you the most comprehensive kit that consists of a refill bottle, syringe, and pool putty. You can find a lot of leaks (up to 40 syringe refills) and fix them with putty.

The Leakmaster Pool Leak Detection Kit contains the same dye as the Leakmaster Pool Leak Detection but a yellow fluorescent instead of blue. Some users note that this color is more noticeable in water than a blue. However, many factors like pool liner or tile color influence it. If you have light – blue is better for you, if dark – yellow.

Also, we should mention pool putty benefits. Unlike Epoxybond Pool Putty, it has pre-mixed resin and hardener. Therefore, you can just apply it to the leak you detect and let it dry for 30-60 minutes.

Verdict:
The Leakmaster Pool Leak Detection Kit is an all-inclusive solution. You get 40 syringe fills and a pool putty to find and fix the leak with minimal effort. However, it costs eight times more than just a syringe. Therefore, you will spend a lot of money if you don’t find a leak.

Pros

  • The most self-sufficient putty – allows you to use it right after unpacking due to the presence both of the resin and hardener in one stick;
  • The most noticeable dye – the yellow concentrated dye allows you to easily spot it even in cloudy water due to its ‎fluorescent-yellow color;
  • Ease of use – allows you to easily and effectively fix leaks due to the presence of video instructions for applying the putty in the kit.

Cons

  • The set comes with video instructions. However, they can be difficult to find because the link, username, and password for access are listed in a non-obvious place – the putty label.

Anderson Refill Leak Tester – the most economical use

The most economical use

CharacteristicsAmazon rating: 4.2 ⭐️
Volume: 8 oz bottle (43 refills of a syringe)
Kit: refill bottle
Color: ‎fluorescent-blue

Anderson Refill Leak Tester is the most economical DYE that will allow you to perform many tests. This bottle can fill up to 43 syringes, three more than Leakmaster Pool Leak Detection.

Also, Anderson Refill Leak Tester is a highly concentrated dye that lingers in the water for a long time. What’s more, the blue fluorescent color allows for performing pool leak detection even in the darkest pool areas (for example, corners or skimmers). This dye is easy to see if you spread it in water and use a flashlight. Then it will glow.

However, despite the highly concentrated composition, the dye will not harm you if it comes into contact with the skin. It can be easily washed off under running water because it doesn’t get absorbed but stays on the surface.

Verdict:
Anderson Refill Leak Tester provides the most economical use with up to 43 refills. However, the kit hasn’t got a syringe added. Therefore, you can consider this product if you have a syringe but run out of dye.

Pros

  • The best for finding slow leaks – the a concentrated blue dye lingers for a long time and forms a stream which penetrates into slow leaks and makes them visible;
  • The best for finding skimmer leaks – blue fluorescent dye glows because it absorbs sunlight, so you can find leaks even in the darkest corner;
  • Safe for the skin – doesn’t color your skin due to the possibility of easily washing it off with plain water.

Cons

  • You need to spread the dye right over the leak to find it.

Bonus: 2 Best Pool Leak Patching Products

Did you manage to find the leakage? Great, now it’s time to choose a pool patching product that will eliminate the problem once and forever. Next, you can see sealer and putty, each of which has a different principle of leak patching.

We have compared these two pool leakage patchers and pointed out their features, pros, and cons, so you can choose the one that suits you best.

Marlig Pool Leak Sealer – the best leak patching

The best leak patching

CharacteristicsAmazon rating: 4.1 ⭐️
Volume: 32 oz bottle
Type: Sealer
Hardening rate: 48 hours

Marlig Pool Leak Sealer is the best pool patching product. 50% of users point out that it helped stop pool leaks, which is 10% more than Epoxybond Pool Putty. Since Marlig is a sealant, you should pour it into the pool, follow the instructions, and wait for the result. It will be able to eliminate even unchecked leaks.

Speaking of instructions, you can find a detailed guide on how to apply the pool sealer on the manufacturer’s website. It describes what steps to take not to harm the equipment and get the maximum effect. Also, if you don’t know which size you should choose (8 oz or 32 oz), you can find an explanation of which product’s volume is best for each situation.

Also, Marlig Pool Leak Sealer has a very high enduring result. Users note that the effect lasts more than four weeks, which is twice as long as other products.

Verdict:
Marlig Pool Leak Sealer is a high-efficient patcher that allows you to eliminate leaks by adding it to your water. However, this is a one-time solution. That is, one bottle is enough only for 22,000 gallons of water, as opposed to putty, which can last longer.

Pros

  • The largest amount of sealant – you can fix a 22,000-gallon pool due to the 32-ounces bottle of sealer;
  • The most enduring result – you will not notice even the smallest leak for a minimum of 4 weeks which is 2 times more than another product has;
  • Detailed instructions – visit manufacturer’s website and find comprehensive instructions which will allow you to choose the right sealant volume;
  • Safe sealant – use sealant even when salt chlorine generators, heaters, pumps, or filters are working because it will harm them.

Cons

Epoxybond Pool Putty – the most universal

The most universal

CharacteristicsAmazon rating: 4.6 ⭐️
Volume: 14.1 oz
Type: Sealer
Hardening rate: 1.5 hour

Epoxybond Pool Putty is the most versatile patching product available. You can apply this both above and underwater. Also, the curing rate of putty is 32 times faster than that of Marlig Pool Leak Sealer and is only 1.5 hours.

Putty contains the resin and hardener, which you need to use 1 to 1. They are easy to mix because they have a consistency similar to soft clay. However, despite the soft composition, putty can withstand high loads (even hit with a hammer) because it contains a hardener. What’s more, this component also allows you to stay in shape even at temperatures up to 200°F.

Also, you can use Epoxybond Pool Putty to repair broken tiles. You won’t need to replace it all because it’s enough to add putty and paint it to match the tile.

Verdict:
Epoxybond Pool Putty is the most versatile leak patcher that will fix the problem within 1.5 hours. However, the use of this product requires prior preparation.

Pros

  • The easiest to use – allows you to fix cracks fast due to the resin and hardener presence which you should mix 1 to 1, apply to the leak, and wait until the mixture hardens;
  • The fastest hardening – the mixture hardens in 1.5 hours, which is 32 times faster than the sealant;
  • Temperature-resistant – allows you not to worry that putty will fall off in warm water due to its ability to withstand temperatures up to 200°F.

Cons

  • Putty turns white after hardening. Therefore, if your pool finish is a different color, you will need to paint it.

Pool Leakage: Evaluating Water Loss & Its Costs

Pool Leakage: Evaluating Water Loss & Its Costs

Your pool can lose up to 1/4″ of water in usual weather and up to 1/2″ in a dry one per day. Of course, it is impossible to give accurate indicators since several factors influence this: air temperature, climate, pool surface area, and so on.

However, it’s worth saying that 1/4″ and 1/2″ is about 78 gallons of water for a 49′ square pool. Thus, it costs you $0.3-0.75 per day. It’s about $9-22.5 per month. Now imagine your pool losing twice as much water. It will cost $18-45. To this amount should be added the cost of balancing the levels. It is caused by the constant addition of water with inappropriate levels. You will get a bill for about $150.

Therefore, if you notice any deviations from the expected amount of water loss, immediately consider purchasing a DYE tester and pool putty, which will cost you about $39. It is 3.8 times less than paying for leaking water and a permanent balance of levels.

💡 Note:
Another reason for levels to be unbalanced may be debris accumulated on the pool bottom. In this case, a robotic vacuum cleaner can help you because it can cope with garbage automatically.

The Most Common Pool Leak Place

Leaks in the pool can appear in different places. However, the three most popular ones should be checked regularly.


Pool skimmer

Pool liner

Pool pump
It is perhaps the most popular place to leak. The skimmer is responsible for collecting debris so that it does not settle on the pool bottom and does not cause bacteria to grow. Usually, the skimmer is plastic and attached to the concrete pool walls. At this point, it may fall off, so leaks will appear.Its service life is 8-20 years. However, punctures may occur during pool maintenance. So if it has a pool liner and a leak, check that part first.

It is the system that circulates the water in the pool. It has PVC tubes that wear out and can leak water.
💡 Note:
If your pump is leaking or losing power constantly, you may need to consider other options. In our article, you can find the 3 best pool pumps to ensure uninterrupted water circulation.

Summary

Leaking pool water is a problem that can cost hundreds of extra dollars a month. Moreover, it can damage the pool structure or cause the ground to collapse. Of course, you do not want a huge problem to arise because of one crack.

So in this article, we have gone over the top six signs of a leak, calculated potential costs, and listed the top four DYE testers and the top two pool patching kits.

💡 Note:
You finally fixed the leak. Now it’s time to relax and have fun with the new pool slides!

FAQ

🔎 Is it possible to detect a pool leakage underwater?

Yes, DYE testers are suitable for underwater use because they don’t dissolve quickly.

🏠 Does homeowners insurance cover pool leakage detection and repair?

A pool leak can be covered by insurance if it is caused by something listed on the insurance policy (such as a hurricane, flood, etc.).

❓ How to find a pinhole in the pool liner?

You need to look for wet spots around the pool and next to them (in the pool itself) use the DYE testers to determine where the leak is.

🧐 How to find a pool leak at the bottom of the vinyl pool?

You need to apply the DYE testers near the suspected leak. If the dye rushes to the bottom, there is a leak in this place.

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