What weakens the hook & loop?

The 'weak point' on a hook & loop fastener is typically the hooks since they are so fine. Once the hooks are damaged from contact with high temperatures the fastening tape becomes ineffective. This is the most common reason for breakdown of hook & loop tapes.

Loop

Hook

Drag

What is outgassing?

Outgassing is the release of trapped gas or vapor that was previously dissolved, trapped, frozen, or absorbed in the solid. Outgassing can include sublimation and evaporation which are phase transitions of a substance into a gas, as well as desorption.