Masking Sol R (20 ml) Mr Hobby Mr Masking Sol R is a liquid mask that once dry can be cut to any desired shape. Use the supplied brush or a smaller brush if required and apply a thin layer it will self-level and create a smooth surface. Once it has dried you cut it with sharp blade desired shape. Making it ideal for masking canopies and camouflage. Once dry simply peel off the film revealing the masked area. This product is water soluble. 20ml bottle with brush.