RodentStop is gray.
Yes, the Rodent Stop can be used on the exterior of a building along any crack that may be providing access to insects or rodents that you need to seal up. Ideally do this on a dry day.
We are unsure of the specific coverage provided per tube of RodentStop, but you may contact the manufacturer directly with questions at (610) 849-1723, or via their website's contact page here.
RodentStop is a thick caulking type material used around pipes and cracks to seal up crevices rodents are traveling through such as around windows, in cracks of bricks, around pipes, etc. This would not be something you would want to use in any part of the car as it would clog lines or likely cause functioning issues.
You will want to use snap traps all around the vehicle tires and places the rodents could first jump up onto from the ground to try to deter them from getting into the wiring areas of the car. Please view our Snap Traps Article and Rodent Treatment Guide for more information.
Yes, RodentStop can be painted over once set and dry.