Foam Sheet is best for most stamping projects. This sheet has special finishes such as a self-adhesive surface or a magnetic back. This sheet is good, especially when adhering your design to a wooden block or another tool for stamping. This sheet provides better insulation and takes up less space than traditional fiberglass, and is much better at blocking air transfer when installed properly.Foam Sheet is most versatile and highly durable. The insulate properties of an inch-thick foam sheet can be up to 3 times greater than other insulates of the same thickness.