delayer

One who delays.

A substance that is used to slow the rate of combustion of a solid rocket fuel so as to make it more controllable

To remove layers from; to strip away levels from.

I've put on every item of clothing I packed in about eight layers. […] Slowly as the morning wore on and I built up a sweat, I de-layered myself. Now I'm down to just two layers of clothing, including two pairs of gloves and socks.