Whats this anti-belt slippage stuff at NAPA?

It helps slightly, its fairly sticky once its dried, its more of a band-aid to the problem. Mostly stops squeeking.

Im not sure about charger belts, do they have a lot more force then normal belts if so I dont know if I would use it...
 
Out at the plant where I work (industrial) we use "Belt Dressing" on motors that drive pumps etc. When a belt starts squeeling, we can spray some on the belts and it stops squeeling instantly and flow meters etc show an improvement over when it was squeeling. I can't say as to how it would work on a blower however I can't imagine it being any different then the vht brand. I also agree that it is a band-aid to a problem that needs to be addressed.
 
Well the supercharger belt isnt too old, and how would it matter how long it is? Its got the idler to take up the slack, and if its bigger it looks liek it would be better cause you get more of the belt to wrap around the pulley, slack is just taken up by the idler pulley. Ill try this to see if it stops making the dust, if it doesnt work, smaller belt it is.
 
Yeah... My belt slips cuz I'm trying to make 14#'s of boost on a stock tensioner.... Haha. I got a custom ford feed belt from livernois to try and help. The only thing it helps is the belt doesn't get thrown off and turned to shred's. Oh well. I need to get A R/R billett a/c delete tensioner...Maybe a smaller pulley on the blower..
 
I bought it and tried it on my accessory belt. MY belt before would squeal like you mom in bed with me cause it got too big when it streched. Like no tension from the tensioner was there at all. I tried it and belt gives out a lil squeak when you start it and thats it so it worked so far. Im gonna throw some on my blower belt and see if i keep getting dust from it and ill let you all know. Dont get any on your hands, **** like doesnt want to come off.
 
I have a KB 1500 that was slipping & tried this stuff (belt dressing)....well...the belt kept slipping under load.....only now the dust was so sticky it stuck to the pulley...the sticky dust then filled the grooves...and the belt started squeeling like a stuck pig!!! The solution for me was twofold: tap new hole for the adjusting pulley by the snout and getting a new belt.