We spent 45 hours on research, videography, and editing, to review the top options for this wiki. Flat tires can be a driver’s worst nightmare, leaving you stranded on the side of the road and fumbling around with that old spare donut you thought you’d never have to use. With the right sealant, though, the experience can be made a little less painful — and with the best kits, it can even be quick and easy. From the temporary to the permanent, these ten fixes will help you get the job done. When users buy our independently chosen editorial picks, we may earn commissions to support our work.
10. Fix-A-Flat S420-6
- Also comes in two- and six-packs
- Hose works on all standard valves
- Safe for pressure monitoring systems
|Rating||3.8 / 5.0|
9. Slime 10009
- Comes in 32oz or 1-gal container
- Can be used repeatedly
- For tubeless tires only
|Rating||3.8 / 5.0|
8. QuadBoss 0849
- Comes with a hand pump
- Should last a while
- Not intended for use at high speeds
|Rating||3.8 / 5.0|
7. Ride-On M/C 41208
- Helps dampen road noise
- 8oz portable container
- Suitable for high speeds
|Rating||4.1 / 5.0|
6. LiquiTube Premium
- For quarter-inch tread punctures
- Economical one-gallon jug
- Chemicals might corrode rims
|Brand||Best Designs Inc|
|Rating||4.3 / 5.0|
5. Orange Endurance
- Lightweight solution
- Injector for easy application
- Can intermix with other sealants
|Rating||4.0 / 5.0|
4. Fix-A-Flat Ultimate 1-Step
- Reusable inflator and gauge
- Complete service at low price
- Compressor can be finicky
|Rating||4.2 / 5.0|
3. Stan’s NoTubes
- Lasts 2-7 months
- Works in rain and snow
- Great for tubeless tires
|Rating||4.8 / 5.0|
2. Slime 70004 Power Spair
- Inflates standard car tire in 3 min
- Comes in durable carrying case
- Powered by battery or car outlet
|Rating||4.9 / 5.0|
1. Berryman Seal-R
- Biodegradable formula
- Also available in 8oz size
- Fiber technology plugs leaks well
|Rating||4.6 / 5.0|
How Tire Sealants Work
Tire sealants are one of the simplest and most cost effective ways to fix or prevent flat tires. Most often, they are comprised of a base of either glycol or latex. Glycol-based formulas contain a number of additives, such as binding agents, organic thickeners, rubber particles, cellulose fibers, and mica. The glycol acts as a carrier liquid for the additives. The fibers and particles can be anything from wool or Kevlar to ceramic. Latex-based formulas require fewer additives to plug tires. Because of this, latex varieties have a lower production cost and are often found in less costly tire sealants. While latex-based options are effective initially, they do have a shorter life span and will often dry in the tire more quickly than glycol-based formulas.
Both types of tire sealant work in a similar manner. They remain in a liquid state when injected into the tire until a puncture occurs. At this time, the pressure inside of the tire combined with centrifugal force pushes some of the tire sealant out through the puncture. The particles and fibers in glycol-based formulas clog the hole, creating an air-tight patch. Latex-based formulas work slightly differently. As a latex-based formula gets pushed out through the puncture, the escaping air passing over it causing it to rapidly dry and solidify, practically becoming part of the tire.
Despite a common misconception, the majority of tire sealants are actually intended for use as a preventative measure before one ends up stuck on the side of the road with a flat. There are a select few, however, that are specifically designed for roadside emergencies. Fix a Flat is one such variety. You can quickly identify whether a particular tire sealant is intended for use as a preventive or after-the-fact repair solution based on whether or not it contains some form of compressed air. While preventative tire sealants are safe for use after one gets a flat tire, after-the-fact repair solutions should not be used as preventative measures.
Pros And Cons Of Tire Sealant
Tire sealant is an extremely fast and affordable solution to fixing or preventing a flat. There is no arguing that it is also very convenient. Rather than spending thirty minutes sweating on the roadside swapping out your tire for a spare, you simply pull a small can out of your trunk, attach it to your damaged tire’s valve, and voila. No more flat tire. If you used the preventative variety, you may not ever even notice that your tire was punctured. It will simply repair itself as you continue to cruise down the highway.
One can purchase tire sealants almost anywhere, from your local automotive parts store to that corner gas station you pass every day. The best place to buy it is often online, though, where one can compare the many different varieties available for price and quality before making their choice.
Using tire sealant is also an ingenious way to prolong the life of an older tire if one doesn’t have the time or money to replace it. While we would never recommend someone drive on a tire that is worn, cracked, or otherwise compromised, if you are determined to do so, injecting a bit of tire sealant into it can make it significantly safer.
It is important to note that some tire sealants actually have the potential to damage a tire. If applied incorrectly, it can pool at the bottom, where it may dry and cause an imbalance or wheel misalignment. While rare, tire sealant may also damage the sensors inside of premium vehicles that alert the driver to when the pressure is low.
In some instances, low-quality sealants have been known to cause wheel corrosion, resulting in a costly replacement. Some service centers also refuse to fix a tire treated with a chemical sealant. There are a number of reasons for this, including the fact that some contain hazardous chemicals, and that they can increase the pressure inside of a tire to a point where the mechanic risks injury when trying to repair it. For most consumers though, the benefits and convenience of tire sealant far outweigh any potential drawbacks.
What Else To Keep In Your Roadside Emergency Bag
Tire sealant is just the one of many items that all drivers should keep in their car at all times. One of the smartest solutions is to purchase an emergency road kit that already contains any and everything you may need. For those that prefer to go the DIY route and piece together their kit, here are a few useful items you may want to consider purchasing.
Every car needs a fire extinguisher. It isn’t often that automobiles catch fire, but when they do, if you don’t have something to put it out quickly, you risk being in the vicinity of a nasty explosion. Keeping a fire extinguisher handy ensures you are ready to tackle the problem should it ever arise.
When stuck on the side of the road, it is important to alert other drivers of your situation. This may be because you are crouching next to the vehicle trying to repair the problem and you want to ensure passing motorists can see you for safety reasons, or you may need to attract the attention of emergency responders or a friendly driver who may be able to help. For these purposes, it is useful to have flares, triangular road reflectors, or flashing LEDs.
It seems like cars rarely break down on a nice sunny day. Rather, it often happens late at night, when it is so dark you can barely see your hand in front of your face. A flashlight will become invaluable at times like these.
Perhaps no items come in handier than a good pair jumper cables and a jump starter. Dead batteries are one of the most common problems to plague motorists. Keeping a charged jump starter in your vehicle allows you to get your car started and back on the road without aid from anyone else. One should still keep jumper cables in their car though for those times you reach for your jump starter only to realize that you forgot to charge it.