Re: Crealock 37 Icebox questions
The top of the box has the least amount of insulation. It was easy to add an inch of blue board there. (I bought a 4x8 at Lowes, cut off what I needed, and left the rest behind. It was gone before I got out of the parking lot.)
We line the freezer side of the box (where the cold plate is) bottom and lower sides with pieces cut from the blue foam camping mats for the greatest of all marine stores - WalMart. It is cheap, easy to cut, flexible, and when nasty is quickly replaced.
We have gallon/quart zip lock bags partly filled with foam beads (ex-bean bag chair) and scraps of the blue foam to cover things on the freezer side. They fill voids, stop air circulation, help hold frozen items against the cold plate, and add insullation.
We have a double thick blue foam pad (foam/spray-glue/foam) to put over the top of the box, but it is such a pain in the ___ that it is seldom used.
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