(1) A material used to protect the interior of a container against corrosion and/or to protect the
contents of the container from contamination by the container shell material. Sprayable linings,
sheet liners, and drop-in liners can be used to accomplish these purposes; (2) Any sheet, plate, or
layer of material attached directly to the inside face of form work to improve or alter the surface
texture and quality of the finished concrete.
