Hold Block Remover is a versatile all-purpose QUALITY marine cleaning solution. It can be used as a powerful stand-alone cleaner for oily stains and residues, or in combination with RXSOL Hold Block Remover as a barrier remover.RXSOL Hold Block Remover is a versatile all purpose marine cleaning solution it can be used as a powerful stand alone cleaner for Petroleum oily stains and residues, vegetable and animal fats, as well as dirt, proteins, soils, coal, ore, coke or in combination with RXSOL Hold Block Remover as a barrier remover.