This 99.8% pure anhydrous (containing the least water possible) isopropyl alcohol made by Techspray is excellent for tape head cleaning, defluxing, stencil cleaning, other light cleaning, and as a flux thinner. Avoid "bargain" alcohols for critical electronic cleaning. Cheap alcohols contain much more water, which slows drying and can cause oxidation, while "denatured" alcohols can leave corrosive residues.