I just happened upon this site and this brings back memories.

I worked along with with Bob Chapman at Unicolor in the mid-70's. There is alot I have forgotten specifically about the various formulas, but K2 stabilizer contained a wetting agent (like Photo-flo), formaldehyde, and probably a pH adjuster.

Soak the negatives gently and allow the emulsion to swell and then use stabilizer. To minimize spotting, you can carefully wipe the negative with a photo-grade spong soaked in stabilizer (but wring out excess stabilizer) to remove excess solution to minimize spots. The emulsion will absorb the stabilizer it needs to protect the dyes.