What the heck is this stuff???

My 416-8 blew a rear tire last week and was leaking some brown, rusty liquid, I thought the rim was rusted out due to the amount of nasty, rusty juice flowing out of the tire.
Pulled the tires and this is what I found on both.


Never seen anything like it and believe it or not, they cleaned up with a garden hose!!!
Here's what they look like with a coat of Jasco Prep - Primer

Probably "Slime" or 'Fix a Flat'

Some kind of fix a flat stuff. I hate it when I'm putting new tires on and get surprised by that stuff and it's happened plenty of times over the years.

GT 14 wrote: Probably "Slime" or 'Fix a Flat'

:agree

Caramel topping with toasted coconut. :hungry1

Sounds yummy.

motor12 wrote: Caramel topping with toasted coconut. :hungry1

Looks more like whats on the bottom of my septic tank. :scared

There was about half a gallon of this stuff in each wheel, makes me wonder if they had been filled at some point?? :confused2

M Bailey wrote: There was about half a gallon of this stuff in each wheel, makes me wonder if they had been filled at some point?? :confused2

I would think so from the amount in there....

Some people go crazy with the flat fixing stuff, If they had been filled there should be evidence of it leaking out somewhere.