TB-95 Etching Fluid For Stainless Steel is used with your TIG brush is a specially engineered conductive head and heat resistant stencils. It creates a sharp, clear etch for lettering and any other design on your stainless steel. TB-95 Etching Fluid For Stainless Steel is unequalled in speed, ease and permanency in adding an engraving to stainless steel. It is an acid that is used to etch surfaces of particular materials.