TTL Ultima Coolant -Eliminates the problems associated with today’s high performance rotary air compressors. TTL Ultima Coolant is a synergistic blend of Polyglycol, Pentaerythritol Tetraester and TTL‘s proprietary additive system. It does not contain any mineral oil or hydrocarbon base stocks. TTL Ultima Coolant has high thermal conductivity allowing for better heat transfer.