On 02/09/2014 12:01, Rod Speed wrote:
nemo wrote
Grimly Curmudgeon wrote

Once you've cracked the leather the fibres are all torn and nothing
is going to fix that. There is no cure in a bottle. Perhaps that's
incorrect and unhelpful, but tough.

The same could be said of anything that is broken or split, yet there
are adhesives, glues and filler compounds that work.

Not with cracked leather boot uppers they don't.
You may be right that a perfect cure is unlikely, but it seems
reasonable to me that a fix may be possible, albeit not necessarily
elegant or invisible. Currently trialling Shoe Goo which is
(allegedly) both a glue and a filler.

But does not claim to be useful for cracked leather boot uppers.

Nope, but this is claimed for the product:
"Product Description
Shoe Goo is a superior no mess adhesive and sealant that easily and
permanently repairs all types of footwear. It adheres to all kinds of
materials, so use Shoe Goo to mend rubber soles, tears in canvas or
leather tops or to stop shoe laces from fraying.

It dries to a waterproof, flexible rubber, so it will repair waders and
boots without breaking or cracking.

Apply directly from the tube to worn out areas and harden overnight.

No mess. Permanent long lasting repair.
Repair damage heels and toes shoe soles.
Secures loose insoles.
Coats frayed shoe laces. "