An inexpensive, water-based solution used as a plastisol, UV and
solvent-based ink barrier. This bright red blockout and touchup liquid
has just the right viscosity to spread easily over every mesh count.
Solvent-enhanced agents greatly reduce dry times, yet the formula is
nonflammable. Blockout 421 is water-soluble therefore, it is not
intended for use with water-based inks.