Synthetic, high performance quenching and hardening oils. Synthetic, high-performance quenching oils with extremely short vapour phase. Extremely short vapour phase allows the almost instant wetting of the whole component surface and thus especially warp-free quenching. Much lower evaporation than equally viscous, mineral oil-based hardening oils. Reduces the warping resulting from quenching to an absolute minimum. Increase in the total hardness compared to mineral oil based, high performance quenchants. Due to its narrow boiling range and good thermal stability, Thermisol QHY produces consistent quenching results even in extremely difficult conditions. Applicable for nearly all applications. Particularly broad temperature spectrum. Rapidly biodegradable.