GRIP works well in on road/race tyres such as these early BFGoodrich R1 radials, which started out as a super-soft compound but which have hardened with age.  Five coats of GRIP had them soft again and they were used on a Cobra replica to great effect.

These road tyres were treated to a liberal dose of GRIP before being fitted to a vehicle destined for the drag strip. The driver recorded his best ever performance in a straight line and also commented on the improved cornering ability - a real win, win situation.