My 300TD has CV axles quiet as a church, no play at all, in fact they are stiff as hell so much I thought I should replace. I assumed that was a problem.

There is some crazing on the boots so I'd like to delay further crazing, then cracking.

Elsewhere the venerable 300Dman has advocated brake part cleaner on a rag to clean the area, then silicone RTV the flexible "original" type over a puncture hole. He advocates it, that's good enough for me. I"m going to give that a shot, possibly a few thin coats with time to dry in between.

Silicone: good ****. I did not put the asterisks there.

2 trashy sets later both returned under warranty (one set from Cardone went crunch crunch the first 10 ft of milage .... the second EMPI set lost the lube out of one outboard side due to a flaky can. I've grown to love changing these half shafts every few months.

i"m putting the originals back in.

Any informed commentary about silicone for this?