Bare Ground Spray-on Tire Grip. This provides added traction to your tires in slippery conditions. Bare Ground Spray-on Tire Grip is one of the few traction devices that give your car extra traction， yet poses no danger to highway and local road infrastructures or your car. Tire Grip is a thin resin film sprayed onto your tires， which makes it harmless to road surfaces， unlike tire studs or chains. More importantly， it does not run the risk of damaging your own drive train normally associated with chains or other traction devices.