With a somewhat manageable leak like that, I'd have tried the kit that comes with the van. It includes sealant. It's going going to fix a gash, but it should work for a puncture.
Yes sealant is Evil goop..
I suggest anyone thats good with hand tools stock a tire plug kit and some side cutters.. way better than tire goop.
I cant recommend them to the average joe because it is not considered an approved practice anymore.
“Tires that have been punctured and repaired with a string plug may hold air for months, years even for the remaining life of the tire. For this reason, many consumers consider a string plug repair a permanent solution. The tire manufacturing industry expressly disagrees. Various industry publications state that the greatest potential danger caused by a string plug repair is that this type of repair allows air and moisture to penetrate the body of the tire. The tire industry maintains that these elements seep in between the layers of the tire allowing the steel belts to degrade and causing the tire to deteriorate and corrode from within. Over time, this corrosion weakens the steel belts and the bonds between the rubber-to-rubber layers and rubber-to-the-wire layers of the tire, greatly increasing the risk of a tread separation. An additional risk of performing a string plug repair is that a puncture, even if it is within the “repairable” area of the tire, may cause damage to the inside of the tires. Without inspecting the inside of the tire, it is impossible to determine whether any damage has occurred, requiring it to be scrapped.“
From Carabinshaw https://www.google.ca/amp/s/www.cara...nce-of-da.html
To be honest, any repair exposes you these issues because they are repaired from the inside and environmental factors can still penetrate up through the repaired area to the belted layer all the same.. At BMW, we are not allowed to fix a run flat tire at all “for safety reasons”.
If your worried, replace the tire - don't fix it. Its the only way that tire can be guaranteed to operate as designed under all conditions.. And the tire companies will love you for it!
But if your going to fix it, why not just be done with it and fix it once and for all.
I personally have not seen many issue with patches and tire cord style plugs. I stock a plug kit and cutters, some rubber glue in all my Vehicles..
I have had to repair my tires on the Pachy 3 times since ownership and have had one plug not seal 100% (odd shaped puncture) in which I dismounted the tire, removed the plug and installed a proper patch at my own convenience.
I just pull over before driving on a flat and causing more damage, find the nail, move the vehicle so the nail is accessible, inflate the tire to 50psi, pull the nail and push in a plug and snip the ears off and set the pressure back to the others - done.
No outside help required - I consider the repair permeant unless it proves otherwise.