Do some form release agent manufacturers use recycled transformer oils in their products?

Yes. Unfortunately, some manufacturers have started using used electrical transformer oils in their products. Obvious health concerns for workers exposed to these materials include the possibility for higher than normal concentrations of high molecular weight aromatics (HMWA) and polychlorinated biphenyls (PCBs).

Nox-Crete uses only virgin, severely hydro-treated naphthenic distillates in their concrete form release agents. These severely hydro-treated, distillates are basically one step away from being edible. They contain 0 parts per million (ppm) of PCB and between 1-3 percent or less HMWA. The materials used in Nox-Crete form release agents meet all current and proposed OSHA requirements for worker safety.