Good quality - do the job properly for best results
I was pleased to find these stick on soles were adequately thick and made from good rubber compound and not the thinly disguised PVC that so many claim as rubber.
Ideally, to finish this sort of job properly, you will need a rotary abrasive wheel, suitable for leather and rubber, and a last to properly stick down the sole.
Abrade the remaining leather sole, to rough it up. Do likewise with the contact part of the replacement sole (a rotary wire wheel is best) and then apply the contact adhesive to both DUST free surfaces and allow to touch dry - usually about five minutes. Repeat application of the contact adhesive so that it is smooth and not clumped but in a decent, even coating, about 30 microns thick and, when touch dry, carefully put the adhesive surface together to mount the sole.
Apply uniform pressure all the way round and , if you have shoe trees and weights, turn the sho over with the tree fitted and place weight on the sole, leaving it for AT LEAST half an hour.
Finally, trim the sole to the welt, using a carpet knife, or similar and carefully run an abrasive wheel around the sole, until the original, leather sole and the new, stick on, have an even profile
this way saves sixty or seventy pounds on the alternative necessity of new through-soles!
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