Yes, WarmStart® RTx is generally active in buffers with pH >7.5, 10–200 mM monovalent salt, and 2–20 mM Mg²⁺.

Activity in other NEB Buffers:
NEBuffer1.1: 10%
NEBuffer2.1: 75%
NEBuffer3.1: 75%
CutSmart™ Buffer: 90%
ThermoPol™: 90%