EXCELLENT WHEN USED INSIDE THE TIRE. SOFTENS FASTER WHEN USED FROM THE OUTSIDE WITH A HOT BOX. WON'T OVERSOFTEN IF DIRECTIONS ARE FOLLOWED. WILL DROP THE HARDNESS OF THE TIRE WHEN COLD BETWEEN 15-35 POINTS DEPENDING ON THE NUMBER OF COATS, AVERAGE OF 20 POINTS. DESIGNED TO PROVIDE EXTRA STICKY TIRES UNDER COLD CONDITIONS.