A rubber sheet is a flat roll or plate of elastomeric material (rubber) manufactured to a set thickness, width and length. It is typically used as a blank or stock material which can then be cut, punched, die-cut, or otherwise processed into final components such as gaskets, seals, liners, mats, or cushion pads.
In industrial usage, these sheets are valued for their flexibility, resilience, ability to absorb vibration or seal interfaces, and their potential to resist various chemical/physical stresses.