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Sold by: MULTI SEAL Corporation
Sold by: MULTI SEAL Corporation
(58 ratings)
96% positive over last 12 months
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Tire Sealant Sportsman Formula - Prevent Flat Tires, Seal Leaks, Contains Kevlar, 32-Ounce Bag, 1-Pack

4.6 4.6 out of 5 stars 1,083 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
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Purchase options and add-ons

Material Propylene Glycol
Brand FlatOut
Style Formula
Item Weight 2.25 Pounds
Item Dimensions LxWxH 4.5 x 2.5 x 9.5 inches

About this item

  • DON’T GIVE FLAT TIRES A SPORTING CHANCE: Save money, time, and stay safe while avoiding costly tire repairs with FlatOut, the revolutionary tire sealant that stops the leak before it happens
  • CONTAINS SUPER-STRONG KEVLAR: Containing super-strong Kevlar fibers FlatOut Tire Sealant Sportsman Formula is water-washable, non-toxic and latex/adhesive-free so there is never a sticky mess to clean up
  • 24/7 PROTECTION: Use FlatOut Sportsman Formula tire sealant as a flat preventative by adding it to your tire and it will continually seal tread punctures up to ½ inch and virtually eliminate slow leaks for 10 + YEARS
  • SPORTSMEN TESTED AND APPROVED: Trusted by sportsmen, heavy construction, agriculture, professional racers and other demanding off-road and all terrain vehicle users for years
  • INTENDED FOR: FlatOut tire sealant is perfect for ATV’s, UTV’s, Golf Carts, Dirt Bikes, and side by sides. (Not intended for passenger vehicles)
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FlatOut Tire Sealant Sportsman Formula - Prevent Flat Tires, Seal Leaks, Contains Kevlar, 32-Ounce Bag, 1-Pack
FlatOut Tire Sealant Sportsman Formula - Prevent Flat Tires, Seal Leaks, Contains Kevlar, 32-Ounce Bag, 1-Pack
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Price$19.99$54.99-17% $9.97
List:$11.99
-16% $15.19
List:$17.99
$54.99$57.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to use
4.5
4.5
3.6
4.0
4.5
4.4
Value for money
4.5
4.3
3.3
3.8
4.5
4.1
Easy to install
4.6
4.5
3.5
4.6
4.3
Sold By
MULTI SEAL Corporation
MULTI SEAL Corporation
Amazon.com
Amazon.com
MULTI SEAL Corporation
MULTI SEAL Corporation
material
Propylene Glycol
Liquid
Plastic
Plastic
Propylene Glycol
Kevlar
form
Liquid
Liquid
Liquid
Liquid
Liquid
Liquid
compatible material
Rubber
Rubber
Metal
Rubber
Rubber
stain resistant
weight
2.25 pounds
10 pounds
14 ounces
0.01 ounces
10 pounds
10 pounds
style
Formula
FlatOut
14oz
32 oz
Formula
4-Pack

Important information

Safety Information

CONTAINS PROPYLENE GLYCOL. NOT FOR HUMAN CONSUMPTION. KEEP OUT OF REACH OF CHILDREN. USE EYE PROTECTION WHEN INSTALLING PRODUCT. MAY CAUSE MILD SKIN AND EYE IRRITATION. IN CASE OF CONTACT WASH AFFECTED AREA WITH WATER.


Product Description

flatout 1
flatout 2
flatout 3
flatout 4
OPE SPORT MP
Outdoor Power Equipment Formula Sportsman Formula Multi Purpose Formula
Customer Reviews
4.6 out of 5 stars
1,979
4.6 out of 5 stars
1,083
4.5 out of 5 stars
1,926
Intended Use Lawn Mowers, Small Tractors, Wheelbarrows, Wood Chippers, Snow Blowers & More ATVs, UTVs / Side-by-Sides, Golf Carts, Dirt Bikes, Off-Road-Only Jeeps & More Boat Trailers, Motorhomes, Golf Carts, Dirt Bikes, Snow Blowers, & More
Made In USA
Seals Punctures Up To 1/2 Inch
Keeps Working For Life of Tire
Available Sizes 32 oz Bags (1-pack /2-pack / 4-pack) & Gallon 32 oz Bags (1-pack /2-pack / 4-pack) & Gallon 32 oz Bags (1-pack / 2-pack / 4-pack)

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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FlatOut

FlatOut Tire Sealant Sportsman Formula - Prevent Flat Tires, Seal Leaks, Contains Kevlar, 32-Ounce Bag, 1-Pack


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What's in the box

  • Tire Sealant
  • Product guides and documents

    Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    4.6 out of 5
    1,083 global ratings

    Customers say

    Customers like the performance and ease of use of the sealant. For example, they mention that it works well, is easy to install, and has good instructions. That said, opinions are mixed on leakage, value, flatness, and air loss.

    AI-generated from the text of customer reviews

    104 customers mention77 positive27 negative

    Customers are impressed with how well the sealant works. They say it fills new punctures as they happen, has absolutely no issues, and is easy to use. Customers also mention that the product works great on tractor tires and makes them feel rock solid. They appreciate the life-of-the-tire durability, plus its ability to seal larger holes.

    "...Its life-of-the-tire durability, plus its ability to seal larger holes attracted me to it as on my large cargo/bikepacking bike flats are a..." Read more

    "...Pressure held. Have put about sixty miles on it now. Absolutely no issues...." Read more

    "Did not work. Don't buy.Buy Ride On. Get the type that is for your application and you will be happy." Read more

    "Used on four wheeler tire and it works great" Read more

    38 customers mention34 positive4 negative

    Customers find the sealant easy to use. They mention it's easy to install, add to the tires, and inject. Customers also appreciate the good instructions and value.

    "...Anyways, easy install. Filled two holes in about 3 minutes...." Read more

    "...used on Coleman Mini bike tire stopped a slow leak instantly Easy to use" Read more

    "No flat tires yet, easy to use and good insurance against flats." Read more

    "Easy to install not put to the test much yet" Read more

    44 customers mention29 positive15 negative

    Customers are mixed about the leakage of the sealant. For example, some mention it fixes leaks for good, while others say it still has a slow leak. That said, some say it seals up tires perfectly and is easy to inject. That being said, others say that it still leaks air from multiple tiny leaks from thorns.

    "...**My two tires are fine so far, no leakage at all, after 10 days of first using this product." Read more

    "...Its life-of-the-tire durability, plus its ability to seal larger holes attracted me to it as on my large cargo/bikepacking bike flats are a..." Read more

    "...this time it held air. it still has a slow leak but considering these tires are 15 years old---very acceptable. I have changed my rating accordingly...." Read more

    "I put them in my electric scooter tires, and it plugged a slow air leak a tire had around the valve stem...." Read more

    20 customers mention11 positive9 negative

    Customers are mixed about the value of the sealant. Some mention it's an excellent value and a great investment, while others say it'll be a waste of money and time. Some customers also mention that the product is a little expensive.

    "...I have used slime and this is much better. Well worth the money so far." Read more

    "Easy to use, I think it's a little pricey but show me something that isn't now days...." Read more

    "...It’s seems it’s worth it plus it’s low price i guess . My advise .. give it a try it’s looks really working ." Read more

    "...A little expensive, but if no other sealant seems to be doing the job, Multi-Seal will more than likely fix it. Thanks!" Read more

    19 customers mention10 positive9 negative

    Customers are mixed about the flatness of the sealant. Some mention that it works to prevent flat tires, while others say that it still goes flat.

    "I have 3 bikes and used this in my other two and so far no flats...." Read more

    "...and drove the vehicle hoping it would seal the hole--nothing---completely flat. save your money is my review." Read more

    "...on my 1st two ebikes (3 flats),, months later after adding Flatout, no flats." Read more

    "I installed this product on my Lawn tractor. the tires had been flat for some time and the side walls are cracked and leaking...." Read more

    15 customers mention9 positive6 negative

    Customers are mixed about the air loss. Some mention that after applying the sealant to each tire, they no longer lose any air. However, others say that they do lose a little air so make sure you carry a pump.

    "...It has worked PERFECTLY. I couldn't ask for better. No air loss whatsoever in the tire over time..." Read more

    "...All 4 tires, lost air (from 6.5, to 2.5 pounds). No large holes, minor torns. Haven't yet called them, though plan to...." Read more

    "Seems to keep tire from losing air." Read more

    "...Put this in and the tire stayed inflated." Read more

    Works on bicycle wheels with tubes, and perfectly on bikes with tubeless setups!
    5 Stars
    Works on bicycle wheels with tubes, and perfectly on bikes with tubeless setups!
    FlatOut Sportsman formula is not expressly labeled as being usable in bicycle wheels, so I called them up and ended up speaking to their product manager who specializes in the bicycle segment. This Sportsman formula was tested extensively with a fat hunting ebike manufacturer. The test environment was heavy bikes traveling over remote trails and overland. The Sportsman Formula IS recommended for bicycles.For fat bikes, the dose for a fat tire (26" x 4.0" and above) is half of a bottle. For Plus sized (roughly) 3.0" tires, its 12 ounces. Scale down from there for smaller tires.On the pictured cargo bike, with 26"x4.3" factory tires and different wheels, I had a jagged piece of metal insert itself into the tire. I was able to pull it out and roll the tire and FlatOut sealed the breach. It was a big enough tear that it very much lends credence to their 1/2" hole capability claim. Given its performance on that and a couple of other pinhole (goathead) punctures, it has totally replaced my use of the other leading green-colored brand. I am running it, so far, on 3 separate bicycles.The fact that this sealant never dries out and lasts for the life of the tire is a major benefit. The fact it claims the ability to seal holes double the size of competing bicycle tire/tube sealants is a bonus on top.TUBELESS BICYCLE SETUPSWhen I spoke to FlatOut, the sealant had never been tested as a tubeless sealant. Its life-of-the-tire durability, plus its ability to seal larger holes attracted me to it as on my large cargo/bikepacking bike flats are a disaster and often on the street are past the capability of the water thin sealants in common use. This stuff is thick and better suited to holes both big and small. The FlatOut product specialist I talked to recommended - to be sure of a bead seal to the rim - that I paint the tire bead with FlatOut on the outside where it contacts the rim to ensure bead and rim form an airtight seal... and give it a try. Well, I wasn't able to do the bead-painting, and instead treated the installation like a standard tubeless install, adding the sealant after using air to seat the tire bead. It has worked PERFECTLY. I couldn't ask for better. No air loss whatsoever in the tire over time (the pictured bicycle wheels tubeless and are the ones I put FlatOut into).In the picture attached to this review, I changed from 80mm rims and 26x4.3" tubed tires, which were my first FlatOut test - to what you see in the pic now: 90mm rims, set up tubeless, and 26x4.8" tires with 16 oz of FlatOut inside each tire.NOTE:FlatOut seems to spread itself evenly around the interior of the tire and stay that way even after sitting for a bit, as even though there is considerable sealant inside the tire, there is no sloshing or unbalanced rotation.PRO TIP: Flatout has a resealable application hose built directly into its lid. If you have presta valves, just take a common, cheap presta-to-schrader adapter and put it over the applicator hose. Then when you remove your valve core to inject the sealant, simply press-fit the adapter to the un-cored valve. The o ring already inside the adapter will provide a seal and you can easily inject FlatOut into the tire.
    Thank you for your feedback
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    Top reviews from the United States

    Reviewed in the United States on February 28, 2024
    Size: 2 PackVerified Purchase
    One person found this helpful
    Report
    Reviewed in the United States on February 20, 2024
    Size: 1-PackVerified Purchase
    2 people found this helpful
    Report
    Reviewed in the United States on December 7, 2020
    Size: 1-PackVerified Purchase
    Customer image
    5.0 out of 5 stars Works on bicycle wheels with tubes, and perfectly on bikes with tubeless setups!
    Reviewed in the United States on December 7, 2020
    FlatOut Sportsman formula is not expressly labeled as being usable in bicycle wheels, so I called them up and ended up speaking to their product manager who specializes in the bicycle segment. This Sportsman formula was tested extensively with a fat hunting ebike manufacturer. The test environment was heavy bikes traveling over remote trails and overland. The Sportsman Formula IS recommended for bicycles.

    For fat bikes, the dose for a fat tire (26" x 4.0" and above) is half of a bottle. For Plus sized (roughly) 3.0" tires, its 12 ounces. Scale down from there for smaller tires.

    On the pictured cargo bike, with 26"x4.3" factory tires and different wheels, I had a jagged piece of metal insert itself into the tire. I was able to pull it out and roll the tire and FlatOut sealed the breach. It was a big enough tear that it very much lends credence to their 1/2" hole capability claim. Given its performance on that and a couple of other pinhole (goathead) punctures, it has totally replaced my use of the other leading green-colored brand. I am running it, so far, on 3 separate bicycles.

    The fact that this sealant never dries out and lasts for the life of the tire is a major benefit. The fact it claims the ability to seal holes double the size of competing bicycle tire/tube sealants is a bonus on top.

    TUBELESS BICYCLE SETUPS
    When I spoke to FlatOut, the sealant had never been tested as a tubeless sealant. Its life-of-the-tire durability, plus its ability to seal larger holes attracted me to it as on my large cargo/bikepacking bike flats are a disaster and often on the street are past the capability of the water thin sealants in common use. This stuff is thick and better suited to holes both big and small. The FlatOut product specialist I talked to recommended - to be sure of a bead seal to the rim - that I paint the tire bead with FlatOut on the outside where it contacts the rim to ensure bead and rim form an airtight seal... and give it a try. Well, I wasn't able to do the bead-painting, and instead treated the installation like a standard tubeless install, adding the sealant after using air to seat the tire bead. It has worked PERFECTLY. I couldn't ask for better. No air loss whatsoever in the tire over time (the pictured bicycle wheels tubeless and are the ones I put FlatOut into).

    In the picture attached to this review, I changed from 80mm rims and 26x4.3" tubed tires, which were my first FlatOut test - to what you see in the pic now: 90mm rims, set up tubeless, and 26x4.8" tires with 16 oz of FlatOut inside each tire.

    NOTE:
    FlatOut seems to spread itself evenly around the interior of the tire and stay that way even after sitting for a bit, as even though there is considerable sealant inside the tire, there is no sloshing or unbalanced rotation.

    PRO TIP: Flatout has a resealable application hose built directly into its lid. If you have presta valves, just take a common, cheap presta-to-schrader adapter and put it over the applicator hose. Then when you remove your valve core to inject the sealant, simply press-fit the adapter to the un-cored valve. The o ring already inside the adapter will provide a seal and you can easily inject FlatOut into the tire.
    Images in this review
    Customer image
    Customer image
    87 people found this helpful
    Report
    Reviewed in the United States on February 5, 2024
    Size: 1-PackVerified Purchase
    3 people found this helpful
    Report
    Reviewed in the United States on February 11, 2024
    Size: 1-PackVerified Purchase
    Reviewed in the United States on March 11, 2024
    Size: 1-PackVerified Purchase
    Reviewed in the United States on March 18, 2024
    Size: 1-PackVerified Purchase
    Reviewed in the United States on February 26, 2024
    Size: 1-PackVerified Purchase

    Top reviews from other countries

    Translate all reviews to English
    Kev Robertson
    5.0 out of 5 stars The Best...updated 11/06/23
    Reviewed in the United Kingdom on December 6, 2022
    Size: 1-GallonVerified Purchase
    Adv Steve
    5.0 out of 5 stars This worked whereas other didn't
    Reviewed in Australia on March 24, 2024
    Size: 1-PackVerified Purchase
    m burrell
    5.0 out of 5 stars Expensive puncture prevention
    Reviewed in the United Kingdom on October 13, 2022
    Size: 1-GallonVerified Purchase
    One person found this helpful
    Report
    Jerry.K
    5.0 out of 5 stars Good product, but unclear instruction of use
    Reviewed in Canada on December 5, 2023
    Size: 1-PackVerified Purchase
    Homer1959
    4.0 out of 5 stars Ce produit seras t'il a la hauteur ?
    Reviewed in Canada on April 15, 2022
    Size: 1-PackVerified Purchase