Is Tyre Sealant worth using?

EurIng

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I've just noticed that my MB Tyre Sealant has expired. I hate the thought of buying a genuine MB replacement.
Questions:
1. Is it worth using tyre sealant with a puncture? Fortunately I've never had to use this stuff, but can it cause more harm than good to the tyre and valve?
2. Does it work??
3. Are there any third party products out there that I could use instead?

Any advice gratefully received - thanks in advance.
 

Doodle

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In most cases they're only intended as a temporary fix to get you off the roadside until it can be repaired properly. Assuming it works.

Which leads onto the fact that most tyre places hate the stuff, it's a complete PITA to clean up to effect that proper repair.
 

fifermerc

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It might seal a minor puncture, although as said, it's likely that the tyre shop you take it to for repair won't like it. Any serious kind of puncture and it's likely to be a waste of time.
I had a puncture last year and tried my sealant (which according to the date had expired) but then discovered that the tyre was burst on the inner sidewall, well beyond any repair. The recovery driver who came to take me home reckoned he'd never seen one that worked - although you could say that might be because he never has to recover the ones that have used it successfully.
When the car was in for a service a while later at a Mercedes dealer, they offered to replace the sealant, IIRC for around £70. I declined their offer, but I wasn't sure if the lack of a new can of sealant would be an MOT issue. Turned out not to be, but I saw a can of sealant in Lidl after that and bought it for less than £5. Hopefully never have to use it!
 

BigJase88

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It might seal a minor puncture, although as said, it's likely that the tyre shop you take it to for repair won't like it. Any serious kind of puncture and it's likely to be a waste of time.
I had a puncture last year and tried my sealant (which according to the date had expired) but then discovered that the tyre was burst on the inner sidewall, well beyond any repair. The recovery driver who came to take me home reckoned he'd never seen one that worked - although you could say that might be because he never has to recover the ones that have used it successfully.
When the car was in for a service a while later at a Mercedes dealer, they offered to replace the sealant, IIRC for around £70. I declined their offer, but I wasn't sure if the lack of a new can of sealant would be an MOT issue. Turned out not to be, but I saw a can of sealant in Lidl after that and bought it for less than £5. Hopefully never have to use it!
I had same scenario. Tyre Foam came out faster than it went it.

Completely useless
 

Blobsta

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ALFAitalia

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I always have the strips (the ones like thin rope covered in sticky rubber glue) in the boot. I've used more of them on other peoples cars than my own...I also always carry a cheap 12v pump to re-inflate. Although they are recommended as a temporary repair they are very sturdy. I repaired one of my Jeep tyres as I got a puncture that day I picked it up!!....to be honest I forgot about it and only noticed when the tyre guy pointed it out when replacing the worn out tyre a couple of years later!! He said he could not have repaired in anyway as it was too close to the edge...something that does not matter with the rope repairs....as long as its in the tread and not the sidewall you are good to go. All the repairs I've done have been at the side of the road with the wheel still on the car. Recommended.
This guy makes a bit of a meal of it but you get the idea....the strips I use a brown and don't need the rubber cement added.

 
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chic0821

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Most tyre shops will not repair it if you have used the sealant, so its a new tyre. Do as ALFAitalia says. I have them in my cars.
 

John757

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I've just noticed that my MB Tyre Sealant has expired. I hate the thought of buying a genuine MB replacement.
Questions:
1. Is it worth using tyre sealant with a puncture? Fortunately I've never had to use this stuff, but can it cause more harm than good to the tyre and valve?
2. Does it work??
3. Are there any third party products out there that I could use instead?

Any advice gratefully received - thanks in advance.
Like most things just because its out of date does not mean it wont work... my cynical side says its a money making exercise for MB...I expect mine is out of date too in my 18 year old Car.
My son had no chance of using the tyre sealant supplied in his Clio sport when he had a puncture....:wallbash:
he did try to drive to a motorway exit for safety... without a spare wheel and only sealant he ended up being rescued by the AA! John iPhone 060.JPG John iPhone 061.JPG John iPhone 062.JPG :rolleyes:

Amazingly the wheel was undamaged... and lived with a new tyre without problem for a year or two!
 

Scooby_Doo

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My car came with runflats, when I replaced them with non runflats I found plenty of places selling the compressor + foam kits for about £25- £35. Whether it's worth using them depends on the size of the puncture and how desparate you are to get going again.
 

John757

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I always have the strips (the ones like thin rope covered in sticky rubber glue) in the boot. I've used more of them on other peoples cars than my own...I also always carry a cheap 12v pump to re-inflate. Although they are recommended as a temporary repair they are very sturdy. I repaired one of my Jeep tyres as I got a puncture that day I picked it up!!....to be honest I forgot about it and only noticed when the tyre guy pointed it out when replacing the worn out tyre a couple of years later!! He said he could not have repaired in anyway as it was too close to the edge...something that does not matter with the rope repairs....as long as its in the tread and not the sidewall you are good to go. All the repairs I've done have been at the side of the road with the wheel still on the car. Recommended.
This guy makes a bit of a meal of it but you get the idea....the strips I use a brown and don't need the rubber cement added.

I've used these too.... many times to good effect.. I also had 'Slime' ( Slime Bike Tube Puncture Repair Sealant - 237 ml | Halfords UK ) installed on a lot of my motorbike and car tyres, and successfully removed screws without the tyre going down.. I would say the slime only works on a small nail or screw hole once removed... a hole larger than that will not seal... the garages as others have said hate the tyre sealant.... I but once I used too much slime in some low profile tyres and they caused so much imbalance in the tyre I had to go to a garage and have all the tyres removed and washed out.... Honda use a sealant called 'Ultraseal ' and offers it to customers at Motorcycle shops its like 'slime' and used it on several motorbikes I owned with no ill effects..... No Spare is a pain... but these days I would opt for a puncture repair kit like the brown plugs show in ALFAitalia's post.....I personally think this is the best option because there is a physical rubber plug... but not really practical to use on a motorway hard shoulder... but nor is swapping a wheel.... foam is lesser of the evils in an emergency. (when it works) failing that... the AA will plug a tyre for you!
 

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