Holts Tyreweld Puncture Sealant Emergency Tyre Repair Foam Car Puncture Repair Kit Sealant, Quick & Easy Flat Tyre Foam, Drive Up To 100 Miles, No Tools Needed Unscented, 400ml , Pack of 1

Tldr; Does the job for small, slow leaks. 3-4day = 1.5-2bar loss. I had a very small leak on a 18 inch tyre, I chose the medium as the tyre was low profile-ish, so the volume within was reduced. It was so small I couldn't identify the leak area, and the tyre held workable pressure for 3-4 days. With tyre pressure at around 1.5bar, I used the entire can as instructed, this brought the tyre to about 2.4bar. I topped it up to about 3bar, thinking I'd loose a little pressure before it sealed. However, as the can is aerosol, it cools when in use, so expands when warms. This happens when you drive as the tyre gets warm, and so I ended up with a tyre pressure the next day of above 4bar steady. It had sealed quickly and increased pressure. I vented the tyre back to normal pressure, and haven't had a problem since. It's held up for two months+. Would recommend for small leaks. I would think anything like a nail would require a plug repair. And if on tyre wall, the tyre has to be replaced. But, it may save you in a pinch for again, small, slow leaks. If your tyre looses pressure within 12hr period, I'd say this is 50/50. Above that and you've got a good chance. Below that and the leak is too fast, indicating a larger hole in the tyre. I don't often recommend must haves as everyones requirements and abilities are different. But this works well for what it was designed for, it's relatively cheap, lasts a while in storage, and is the size of a can of hairspray.

Perfect and it work amazingly

I only needed a little for a slow puncture which I had to put air into every week, and for a motorbike. I had to let some air out first, but not sure how much, but I let about 10psi out and put this can on the valve and opened it. It let a bit in, but soon started to stop flowing and eventually started back flowing from the pressure in the tire and made a little mess round the wheel (nothing too bad as I shut off as soon as it happened). I didn't hold much hope that it would hold but it did. No more inflating my rear tire every week. The can is knackered, but what little went in did the job. UPDATE: Many thousands of miles later and it still held. I have a new bike with another puncture now so am buying again. Word of warning for slow punctures: Let your tire down by more than halfway to get most of the contents of the can in, otherwise the pressure will stop it, and ride it straight away for a good 5 miles to get the foam where it's supposed to go (in the leak).

Amazing purchased, saved my bacon! I purchased a few cans of Holts (never used it, or any similar products before) and removed the spare tyre from my fairly old Mazda MX5 MK1 (hardly any boot space). About 2 weeks after purchase I discovered a flat on a trip out. The can was very easy to use and did the job perfectly. The tyre was fully inflated (fairly small tyres though..) and 2 weeks later the tyre is still going strong (you are supposed to change tyre once you get home, but having a spare in the garage, I'm curious to see what happens). The can fills the tyre with foam/air which also seals any puncture with a film on the inside of the tyre. This item worked perfectly (even in the dark and freezing cold) and saved me a huge headache in breakdown times etc. It did take maybe 20 minutes to complete the whole procedure from getting it out of the boot to driving away (although this is my first attempt.. you can probably do it faster). My two concerns/mild negatives are: 1. There's no way to tell when the can is 'spent' it gets to the point where you're wondering whether it's done (and you're anxious to prevent air-loss) or still going. 2. There's an incredible amount of pressure in the can, when filling the tyre, the cracks between the lid/nozzle and can had air/foam coming through (small fizzing amounts) I did have a slight worry that the whole thing might explode and take my eye out.. it didn't of course and I've given this 5* as it's brilliant but just a forewarning note in case you have the same.

Good quality

Despite following the instructions to the letter, this was not able to seal a hole left by a large screw. The instructions say to remove the object which caused the puncture, which I was reluctant to do because I knew it would make the sealing process more difficult. Ended up dumping a lot of sticky white foam all over the drive, not all of which has washed off and I will have to get a pressure washer to it. In the end I had to use this product in combination with another tyre repair product which stuffed a sticky black tube in the hole. This got me to the garage where the tyre was replaced.

Works a treat. Couldn't identify any foreign body that could have caused a flat. Tyre would only hold air for about 10 minutes. Used this (searched for full instructions on the web as those on the can aren't complete) it cured the problem (whatever it was).

hopefully never needed. Portable and compact.

Ich habe damit einen Schubkarrenreifen geflickt. Hat super geklappt.

Contents went everywhere, what a mess!

Like a fire extinguisher I will use it only in emergency so cannot tell if it is going to be any good. I hope so! Will be able to report more after use.

Gut