Does anyone have any experience with the effectiveness, or otherwise, of proprietary tyre bead sealer? I have a 2005 Mk2 that loses pressure on all 4 tyres and has led to quite serious underinflation a couple of times. The OEM alloy wheels don't appear to be damaged and the bead seating area look clean and not corroded. At first I thought it may have been the tyres, when I changed to a new set of Dunlop blu response, but have now reverted to original bridgestone, with no improvement. My other Octi---20 year old mk1, on steel rims, also with Dunlop tyres, does not suffer with this problem. Would much appreciate any input, from members.

The tyre gunks never worked for me, tyre removal roraty wire brushing the bead area then brushing on the black gloop before refitting the tyre sometimes gave a temporary improvement but never a cure.

 

The only cure fitting tubes which is a no-no with tubeless tyres that have internal ridges or shotblasting and powder coating wheel refurbishment.

 

All 4 alloyw on the MK1 Octavia lost pressure fairly fast, the MK2 had a couple going that way, my Yeti has just started with one wheel and its a slippery slope.

Over the years i have cleaned & refinished plenty of beads, then used sealer to stop loss of air.

Sometimes it works sometimes not.

 

Quite reliable with someones dodgy alloys for me has been to let out the air, put half a can of Cheap Tyre Weld Copy as sold at Discount Home Stores in and inflate and then get more air in and up to a high pressure and spin them well. Actually on a private bit of land.

Pressures set and job done and usually successful.     Gubbed alloy rims holding air. 

Personally getting sick of alloys losing air. Think the only option is to have them refurbished. You may have noticed bits of the bead sticking to tyres when someone has tried to clean the bead and seal again at the Tyre shop. This gives you about 4 months of relief from the issue but it soon returns. I think VAG alloys are made of chocolate. 

I break the bead on the affected side having checked for leaks using soapy water then clean the rim sealing area with a stainless steel pan scourer and sandpaper.

 

I find it's old tyre lube that's the issue, ****ty work practices at the tyre shops that don't clean and inspect the rim sealing area before slapping a tyre on, dry mounting tyres and cobbling the tyre bead and the finishing touch is hammering wheel weights on the external wheel face.