I was wanting to have a spare gallon of DEF in the pickup . I put the DEF in to a gallon mile jug. The DEF seeped through the plastic! My truck bed has a bed rug in it. The rug started growing some...
I buy Def in a 200 litre barrel that I get refilled. Often when I refill the barrel I end up with DEF spilled in the bed of my truck or down the side of the endgate. I've never been concerned about it..... I spray the white stain off the next time I go to the car wash. I've presently got 6 vehicles that take DEF and I've never cleaned up after a spill nor have I seen DEF do any damage to a painted surface.