For a good comparison, drive over the nail board with a tire that has NO sealant in it. Of the 33.9 million replacement tires purchased by fleets in 1998, 19.4 million were retreads, only about 14.5 million were new. For the retread service technician a primary concern is the condition on the inside of the carcass. The plugs can be removed with a brief shot of air from the outside. Trucks and busses save money with retreads.
Retreads are the replacement tire of choice for most truckers.
As tires become more difficult to dispose, the cost of new tires for automobiles will increase since tires are classed as hazardous to the environment. Retread technology continues to develop making it more feasible for consumers to be reaping the same benefits of retreading as truckers. Clean the inside of the tire with running water. Locate the puncture and clean the area according to the instructions from the manufacturer of the patch. Upon tire sealant insertion a typical car tire contains 5 to 6 ounces of ethylene glycol.