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Top 8 Best Tire Sealants of 2021 Review & Buying Guide

We have all had a flat tire at some point. A puncture is never expected and can often be an enormous problem, especially if you don’t have a spare in the trunk. But, what if we told you it is possible to fix that flat in less than 15 minutes and be back on the road? It might sound too good to be true, but it’s not.

All you need is a tire sealant! Some of the Best Tire Sealants can seal punctures up to half an inch in size, allowing you to drive your car to the mechanic. But do you need a liquid or a pressurized sealant? Well, in the following review, we go through that and more, so that when you decide to purchase a tire sealant, you will know exactly what you need.

Let’s go through them starting with our…

Best Tire Sealants

Top 9 Best Tire Sealants for All Budgets in 2021 Reviews

ProductsSealant TypeMax Puncture SizeTire Sensor SafePriceRating
Sealant Type
Aerosol
Max Puncture Size
1/4" in diameter
Tire Sensor Safe
Yes
Price
$
4.4 out of 5 stars (4.4 / 5)
Sealant Type
Aerosol
Max Puncture Size
1/4" in diameter
Tire Sensor Safe
Yes
Price
$$$$
4.1 out of 5 stars (4.1 / 5)
Sealant Type
Liquid
Max Puncture Size
1/4" in diameter
Tire Sensor Safe
Yes
Price
$$
4.5 out of 5 stars (4.5 / 5)
Sealant Type
Liquid
Max Puncture Size
1/4" in diameter
Tire Sensor Safe
Yes
Price
$$$$
4.6 out of 5 stars (4.6 / 5)
Sealant Type
Liquid
Max Puncture Size
3/8" in diameter
Tire Sensor Safe
Yes
Price
$$$$
4.6 out of 5 stars (4.6 / 5)
Sealant Type
Liquid
Max Puncture Size
1/4" in diameter
Tire Sensor Safe
No
Price
$$
4.5 out of 5 stars (4.5 / 5)
Sealant Type
Liquid
Max Puncture Size
1/2" in diameter
Tire Sensor Safe
No
Price
$$
4.5 out of 5 stars (4.5 / 5)
Sealant Type
Liquid
Max Puncture Size
3/8" in diameter
Tire Sensor Safe
No
Price
$$$
4.7 out of 5 stars (4.7 / 5)

1 Fix-A-Flat S420-6 Aerosol Tire Inflator with Hose – Best Budget Tire Sealant

When it comes to tire sealants, you will most likely have heard of Fix-A-Flat before. Fix-A-Flat is one of the best low cost pressurized aerosol-type tire sealants you can buy. With Fix-A-Flat on hand, you can repair tread punctures up to a quarter of an inch in diameter. It comes in a 16-ounce spray can with a hose that screws directly onto your tire stem.

Shake, shake, shake…

Since Fix-A-Flat is pressurized, you need to shake it very well before using it. We recommend shaking it for about 30 seconds, so the sealant and propellant are well mixed. Move your tire so that the puncture is at the bottom. Then simply attach the flexible hose to your tire stem and press down on the yellow button.

As the sealant goes into your tire, it will also inflate the tire a bit as well. Hold down the yellow button and keep shaking till you empty the can of all the sealant. Once you have emptied the can, your tire should sit off the rim. For the sealant to thoroughly coat your tire’s inside, you will want to drive your car for about five to ten minutes.

What’s our verdict?

Fix-a-Flat is super easy to use, but it is not a permanent solution. It will help you get to the nearest mechanic so you can properly fix the flat, and that is about it.


Fix-A-Flat S420-6 Aerosol Tire Inflator with Hose

Our rating:4.4 out of 5 stars (4.4 / 5)

Pros

  • Easy to use.
  • 1/4″ punctures.
  • Inflates your tire.

Cons

  • It will not fix valve punctures.

2 Fix-A-Flat S50073 Ultimate 1-Step Tire Repair Kit – Best Value Tire Sealant for the Money

The standard Fix-A-Flat aerosol tire sealant is excellent, but it does not work well on larger vehicles. It simply does not have the power to inflate large tires.

For an SUV or truck, check out their Ultimate Tire Repair Kit. Fix-A-Flat’s 1-Step kit comes with the same great aerosol tire sealant as well as a portable tire inflator.

Just Connect, Inflate, and Go! ™

This tire repair kit incorporates a single-use aerosol spray into the body of a tire pump. To use this kit, you need to begin by laying it flat out on the ground. It comes with a long 12V cigarette lighter type adapter that will power this kit. Plug it into your vehicle but do not start the vehicle’s engine.

Then connect the black tire pump hose to the sealant cartridge nozzle located next to the flexible sealant hose. Press the yellow button and wait as your tire pumps up. Fix-A-Flat has integrated a small gauge into the pump so you can monitor your tire pressure as you inflate. They have also included a small LED light that allows you to fix your tires easier in the dark.

Is it right for you?

The tire pump on hand will inflate large SUV or truck tires, but it takes quite a while to do so. Once you are finished, remove the aerosol can.

Even if you have some sealant left in the can, we recommend throwing it away. You can then replace it with any of Fix-A-Flats other aerosol tire sealants.


Fix-A-Flat S50073 Ultimate 1-Step Tire Repair Kit

Our rating:4.1 out of 5 stars (4.1 / 5)

Pros

  • Tire gauge.
  • LED flashlight.
  • Lightweight.

Cons

  • Operates slowly.

3 Slime 50107 Smart Spair Emergency Tire Repair Kit – Best Mid Range Tire Sealant

This next tire sealant is called Slime. As you might have already guessed, this is a liquid type of tire sealant. They call it Slime because of its green color. According to the manufacturer, it can patch holes up to a quarter-inch in size.

Four Easy Steps…

To get a liquid sealant into your tires, you will need to remove the valve stem core. You will want to have the valve stem rotated away from the ground. A valve stem core removal tool comes included. Once you remove the core, your tire will fully deflate.

From there, attach the hose to the bottle of Slime and squeeze the liquid into the tire. You will most likely end up using the majority of the sealant unless you have tiny tires.

What’s next?

Then screw the valve stem core back in and attach the air compressor hose. The air compressor on hand will take about eight to ten minutes to inflate your standard car tire.

If you are pumping up an RV or SUV tire, expect to wait much longer. Also included with this kit are a few other air compressor adaptors so you can pump up balls and rafts.

But you should know…

While it might only take four easy steps to get your tire in working order, you are not done yet. They do not call this tire sealant Slime for no reason. It is very messy!

Thankfully it washes off easily and will not mess with your tire sensors either.


Slime 50107 Smart Spair Emergency Tire Repair Kit

Our rating:4.5 out of 5 stars (4.5 / 5)

Pros

  • Seals quickly.
  • Lasts for up to 100 miles.
  • Tire sensor safe.

Cons

  • Challenging to work with.

4 AirMan ResQ Pro+ Tire Repair Kit – Best Premium Tire Sealant

Some of the Best Tire Sealants are made of a gel-type liquid. The AirMan ResQ Pro+ comes with 450ml of gel sealant and a pass-through valve hose.

AirMan has made this gel sealant to be flame retardant as well as biodegradable. You can easily wash it off your tires, and it will not cause your rims to rust either.

Performance…

To get this sealant into your tires, you will want to use the included air compressor. The integrated air compressor runs off a cigarette lighter adapter. When you turn the air compressor on, sealant will automatically be pumped into your tire. You can even monitor your tire pressure via the gauge on top of the pump.

Once you have the sealant in your tires and drive a few miles, you can drive on the repaired tire for quite a while at speeds up to 50mph. You will still need to properly patch the tire down the road, but this sealant definitely holds up better than most.

But that’s not all…

Another great thing about this tire repair kit is that the pump can be used separately without the sealant. This will allow you to top up your tires when and wherever you want.

It can inflate your average 10-liter car tire in just under two minutes. Even larger 50-liter car tires only take six minutes to inflate fully.


AirMan ResQ Pro+ Tire Repair Kit

Our rating:4.6 out of 5 stars (4.6 / 5)

Pros

  • Adapters included.
  • Biodegradable.
  • Carry bag.

Cons

  • Heavy.

5 TireJect Tire Sealant Kit – Fix and Prevent Flat Tires – Best Tire Sealant for Tractor

TireJect is another liquid tire sealant, so make sure you have a tire pump on hand because this product does not come with one. What it does come with is four 10 fluid ounce bags of sealant. This should be enough for you to patch all four of your tires. TireJect includes a large syringe-looking injector you can use to push this sealant into your tires.

The syringe can hold up to 5 fluid ounces of sealant at a time. It also has measurements on the side of it, so you know how much you are adding. TireJect is made to plug punctures up to three-eighths of an inch in size on your tread or your sidewall. This sealant also works as a preventative measure against future punctures. It even helps prevent bead leaks and dry rot in older tires.

TireJect Mobile…

TireJect even has its own mobile app available on iOS and Android. With this app on hand, you can input your tire width and rim size. It will then tell you how much sealant you should use. The app will also keep track of when you last put the sealant into your tires and remind you when to add more.

TireJect really works wonders if you use it on off-road tires like those found on your lawnmower or tractor. While you can use it on your everyday driver, it just does not hold up as well.


TireJect Tire Sealant Kit

Our rating:4.6 out of 5 stars (4.6 / 5)

Pros

  • Tire monitoring app.
  • Works on off-road tires.
  • Enough for each tire.

Cons

  • No air compressor.

6 Berryman 1332 R Tire Sealing Compound – Best Tire Sealant for Slow Leak

If you want to keep things simple, you could also check out this liquid sealant from Berryman. With Berryman’s 1332R tire sealing compound, you do not need any special hoses or injectors to fill your tires with this sealant.

This tire sealant comes in a 32-fluid ounce squeeze bottle with a retractable filling tube. Once you remove the air from your tires, you just need to squeeze some sealant in through the valve stem.

Universal…

You can use this tire sealant on pretty much any type of tire you can think of, making it be of the most versatile tire sealants on the market. We tested the sealant on some bicycle tires and our company SUV, and it worked equally well.

Though the liquid might seem runny, it is full of fibers that will bind to any punctures you may have. It bonds reasonably quickly and can plug holes up to a quarter-inch in size.

But be careful…

You want to make sure that you only put in the correct amount of sealant, though. It does not stick and bond to the inside of your tires as some sealants do.

Instead, it will stay liquid and pool up if there is too much. When you take off your tire to get it adequately patched, it will run all over the place. It will not damage your rims, but make sure you have some water and rags handy to clean things off, nonetheless.


Berryman 1332 R Tire Sealing Compound

Our rating:4.5 out of 5 stars (4.5 / 5)

Pros

  • Useful on all tire types.
  • A little goes a long way.
  • Integrated spout.

Cons

  • Messy.

7 FlatOut Tire Sealant (Sportsman Formula) – Best Tire Sealant for ATV

Another excellent tire sealant that works well on off-road vehicles is this product from FlatOut. FlatOut’s Sportsman Formula liquid sealant can plug holes up to half an inch in size!

That is if the puncture is on the tread of your tire, though. Sidewall punctures are still sealed but will struggle if they are more significant than three-eighths of an inch in size. It comes in a large 32 fluid ounce bottle that should be enough to seal an average ATV or golf cart tire. While this might seem like a lot of sealant for just one tire, in this case, it is not.

Durability…

FlatOut has designed this sealant to last, and for it to do so, they incorporated Kevlar fibers into it. One bottle of this sealant should cover every inch of your tire and absorb into it.

When you get a puncture, it will seal it quickly. It will then also fill any future holes as well. FlatOut says you can expect up to ten years of protection from punctures, dry rot, and bead leaks with their Sportsman Formula sealant in your tires.

But that’s not even the best part…

FlatOut even includes a tire valve core removal tool with each bottle. They also provide a replacement core as well in case you damage yours when removing it.

Our only fault with this tire sealant is that it is not safe to use with tire pressure monitoring systems. If this sealant does come in contact with tire pressure monitors, it will ruin them immediately.


FlatOut Tire Sealant (Sportsman Formula)

Our rating:4.5 out of 5 stars (4.5 / 5)

Pros

  • Plugs 1/2″ punctures.
  • Lasts for ten years.
  • Comes with an extra stem.

Cons

  • It will damage TPMS.

8 Stan’s NoTubes Tire Sealant Race – Best Tire Sealant for Tubeless Bicycle Tires

The final product we are going to look at in this Top Tire Sealants roundup comes from Stan’s NoTubes. They call this sealant NoTubes because it is only meant to be used on tubeless bicycle tires.

At first glance, this sealant has an almost milk-like consistency to it. It is extremely strong and seals a hole as large as your valve stim quickly.

NoTubes™

With every other tire sealant in this review, you will notice either an injector or a tube included allowing you to quickly put it in your tire. This is not the case with Stan’s NoTubes Race Sealant. To install this sealant, you will need to unseal your tire from the rim. You do not need to completely remove it, but you need to leave enough room so you can pour the sealant in.

Simply pour the sealant in and remount your tire onto the rim. Then rotate the tire around so it spreads evenly and seals your tire beads. We found that if you spray a bit of water onto your tire beads, you will have a much easier time getting everything seated correctly. Make sure not to spill any on your valve stem, or it will clog it up and have to be replaced.


Stan's NoTubes Tire Sealant Race

Our rating:4.7 out of 5 stars (4.7 / 5)

Pros

  • Environmentally safe.
  • Lasts for 2 to 3 weeks.

Cons

  • Tubeless tires only.
  • Installation.

Best Tire Sealants Buying Guide

Best Tire Sealants Buying Guide

Finding the perfect tire sealant for your needs is not that easy. Throughout this Best Tire Sealants review, you noticed that even though each product will seal a puncture, they differ somewhat from one to another.

How do they work?

The compounds in all tire sealants are relatively similar. Tire sealants typically come as a liquid or as an aerosol. Depending on your vehicle, you may be able to use either. Once you fill your tire with the sealant and drive, it will coat the tire’s inside. The pressure inside your tire will then push the sealant toward the puncture and fill it.

Aerosol sealants

Aerosols typically perform a chemical type of seal. The particles in the aerosol will collect around the puncture and stick together to form the seal. An aerosol-type tire sealant is a one-use product. They come in a pressurized can that contains propellant and a sealing agent. Simply shake the can vigorously and attach the flexible sealant hose to your tire valve stem.

Then press the button on the can, and a white foam-looking substance will start filling into your tire. As the foam goes into your tire, so will air. You will actually notice your tire inflate as you discharge the can.

Liquid sealants

Liquid sealants have fibers that perform a mechanical type of seal. And they are not pressurized. You can only use them on deflated tires! To use a liquid sealant, you will need to remove the tire’s valve stem. Depending on the manufacturer, a stem remover may be included.

Once the valve stem is removed, and your tire is fully deflated, you attach the hose that comes with your liquid sealant over the tire valve.

You then squeeze the sealant into your tire. Some liquid sealants come in a bottle with measurements labeled, allowing you to precisely add the correct amount of sealant. After you have added the appropriate amount of sealant, you can put the valve stem back in. A liquid sealant will spread around your tire just like an aerosol sealant does.

Differences

The main difference is that after using a liquid sealant, your tire will still be deflated. To ensure the sealant spreads thoroughly throughout the inside of your tire, you will need to pump up the tire and drive a few miles. This makes liquid sealants a bit more challenging to use on the side of the road unless you have a tire pump.

Thankfully, some sealants are sold as a kit with a portable air pump.

With a complete tire kit, you can inflate your tires whenever you want, no matter where you are. The tire pumps found on these all-in-one type kits will need to be powered by your vehicle’s cigarette lighter. A tire pressure gauge is also typically available for you to monitor your tire pressure as you inflate them as well.

While these types of kits are handy, do not expect them to pump up your tires quickly.

Take caution…

While a tire sealant may help get you back on the road, you need to make sure you use them correctly. Tire sealants are best used on holes no bigger than a quarter of an inch in diameter. Anything more significant, and the sealant will most likely have a hard time and fail. The reason that you want to drive your vehicle after you add a tire sealant is so that it heats up.

If it does not heat up and disperse, the sealant can pool at the bottom of your tire and damage it. Lastly, you need to make sure the sealant is compatible with tire pressure monitoring systems. No matter the sealant, make sure that you clean up any excess off your valve stem and wheels; otherwise, it may corrode.

What other vehicle care and repair products do we recommend?

To find out, check out our reviews of the Best Car Scratch Remover, the Best Leather Conditioners and Cleaners for Cars, the Best Deep Cycle Battery Charger, the Best Bicycle Pump, and the Best Radiator Stop Leak you can buy in 2021.

And for more superb products, take a look at our reviews of the Best CO2 Bike Tire Inflators, the Best Engine Air Filters, the Best Bicycle Tire Pressure Gauge, the Best Rust Prevention products, and the Best Motorcycle Tool Kits currently on the market.

So, which is the Best of the Best Tire Sealants?

We’ve come to the end of our review, and it’s time to find out which tire sealant sealed its way to victory? The winner of this Best Sealant for Car Tires roundup goes to the…

AirMan ResQ Pro+ Repair Kit

This all-in-one kit will get you back on the road in no time at all. With AirMan ResQ Pro+ liquid sealant on hand, you can plug quarter-inch punctures. Once sealed, you can drive at speeds up to 50mph.

It comes with enough sealant for all tire sizes. And thanks to the integrated air compressor, it is easy to use and maintain your tire pressure down the road, no matter your vehicle’s size.

Happy motoring.

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