As someone who has to deal with rims and tires all day, I freaking hope this never happens. I would rather be stabbed in the leg with a rusty knife than deal with tires packed with sealant.

I cannot even begin to count the number of times I've needed to used the emergency eyewash station because of tire sealant, even with eye protection, the stuff gets everywhere, and customers always seem to "forget" that they used an entire can of sealant to fix their tire leak so we get to be covered in the stuff for hours and scrub the machines down, the walls, the floors everything. Ask any Tire tech what they think of fix-a-flat or tire sealant and you'll likely get a similar response.