Unprocessed foam rubbers in the form of boards, sheets, blocks, [ rods, powder, and pellets] for use in further manufacture; semi-processed foam rubbers in the form of boards, sheets, blocks, [rods, powder, and pellets] for use in further manufacture; unprocessed or semi-processed rubbers, namely, foam rubbers, rubber shock absorbers for industrial machinery, and shock absorbing rubber buffers for industrial machinery; synthetic rubbers; rubber sealants for insertions in various joint-gaps an...