Urethane Formula Shoe Repair is a patented urethane rubber repair system designed to restore and rebuild all types of footwear. Unaffected by heat or solvents, FREESOLE cures to a flexible thermoset rubber product providing superior adhesion, wear resistance, flexibility and waterproofing. The highly concentrated formula has minimal shrinkage: thick repairs can be made with only one permanent application. Ideal for worn heels, toes, sole and ski delaminations and more. FREESOLE will not separate with repeated flexing.