Originally Posted By: JHZR2
Fluid film is $49.50/gal. I paid $45/gal for carwell.
Fluid Film will wash off before a full winter season if you do any actual winter driving. We bough GALLONS of Fluid Film to under coat a Dodge truck, put it on with an undercoat gun...it was completely gone by the end of winter. Our home brew undercoat lasted longer, and its just a mix of oil.
The best stuff I ever used for under coating was petroleum bright stock...it has loads of wax, and needs heated to spray; but it never comes off and is self healing.