Flexitol Heel Balm -Flexitol Heel Balm contains 25% urea (chemically synthesized) in a specially formulated base to maximise its efficacy. The combination of moisturising, hydrating, emollient and occlusive properties make Flexitol Heel Balm highly effective. It is recommended as a treatment and preventative therapy for diabetic and general footcare. Flexitol Heel Balm is also very effective to prevent blisters and friction.