Rubber Tire Softener Is For The Following Conditions 
Rubber Tires Only!
Apply At Home 2-3 Days Keeping Tires Bagged At Room Temperature Until Desired Softness
Any Heat Sourse Will Speed Up The Process
Great Track Side As Well Or As A Burn In Prep (Not Favorable To Dusty Conditions)  
Not Recommended For Traxxas S-1 Or Any Soft/Super Soft Tires