Hair- use hair debonding cream available from lots of hair shops specialising in Asian and black hair. Super glue - they now sell a debonding stuff in similar tubes to the glue, in places like b & q and wilkinsons. pva - hot water

Bhaskar S. Majumdar has written:

'Isothermal fatigue mechanisms in Ti-based metal matrix composites' -- subject(s): Debonding (Materials), Metal fatigue, Crack initiation, Metals, Metallic composites, FaiIure analaysis, Fatigue, Metal matrix composites, Fatigue life

This answer pertains to tile set on a concrete substrate! Assuming your thin-set is properly mixed with correct water ratio, the substrate is free of any bond breakers, and it is troweled for the type of tile your using, the most common problem is moisture coming up through the slab collecting at the tile/substrate interface.

If you are in a humid climate the HVAC will pull moisture out of a concrete into the less humid interior. Water breaks down the thin-set bond to the tile and emulsifies other mastic's/glues intended to secure a VCT product.

The best way to prevent moisture from wicking through a slab is to waterproof the concrete substrate with a product that will will stop this moisture transfer. It will also prevent the alkali in a concrete from coming out to a surface where it reacts with an atmosphere. Alkali burn causes a paint to bubble, peel and blister off a concrete. With a waterproofed concrete this alkali does not migrate out and form efflorescence salts. When you stabilize concrete, contaminates don't enter and moisture doesn't travel to a surface.