The Techni-Pro TST-70/30IPA-G is a Flux remover (defluxer) that removes flux residues and other contaminants left by manufacture, rework, or repair of printed circuit boards. Residues from higher, lead-free temperatures are more baked on and harder to clean. Techspray® flux removers have been proven very effective at removing fluxes baked on at lead-free temperatures.70% IPA / 30% DI for stencil and other cleaning when slower evaporation is desired.