aberaleigh
New member
I have a few customers that instead of using methanol or Rv antifreeze they instead mix their FB soap with the windshield washer fluid thats rated to -15. They use one 5 of simonize concentrated FB soap, usually bubble burst and anywhere from 20 to 25 gallons of the washer fluid. So far they have had no problems with it and it is a bit cheaper for them then the soaps with the methanol already in it.