I don't know. Fortunately I don't see pink well. I've never heard of "Repel Silane".
I used to siliconize using the dimethyldichlorosilane, or whatever it was, without any solvent. IN THE FUME HOOD I would fill a glass beaker with microfuge tubes, add a couple of drops, press a foil over the top and leave a couple of hours, then leave loosely covered overnight to dissipate the chemical. It will quickly evaporate and siliconize surfaces it contacts (tubes, glass, your lungs if you do it wrong, and etc.) I seem to remember it could be diluted, as you did, and sorry I don't know what the problem was. If it got wet that wouldn't be good.