The ac belt on our ISX is slipping and I'm wondering if there's anything I can put on it to give it traction till we can get to a parts store.

Belt dressing.http://www.kpg-industrial.com/products/belt_dressing/ There is only one belt so the ac might be locking up.

Well I'm not fond of doing that but it will work in a pinch... I suggest cleaning the pulley well and replacing the belt. Most times you find the belt is glazed and would pull the torque any longer.

I never had any luck with belt dressing... check the tensioner to see if it's working, not wore out, misaligned. Like Mike said check the AC itself... water pump, fan are on the belt too.

Just got done working on a Subaru that had the same thing the belts are tight and still slipping. I took the belt of and felt the rubber in the inside and it totally glazed up and harden so the belt has zero way of getting grip with the pulleys. Hence the slippage.

Thanks for the input guys. Tried belt dressing but it didn't seem to do the trick. We will have to get a new belt I guess.