Dermaplast, heel blister patch, 5 pcs self-adhesive hydrocolloid patches. Action Dermaplast, a patch for blisters on the heels hydrocolloid patches, which turn into a gel after absorbing fluid leakage from the bladder. provide comfort and pain relief by safely covering the wound and reducing the pressure on the skin. Twin Tec structure: double hydrocolloid layer in places requiring even more effective treatment. the plaster allows the skin to breathe, discreet and easy to apply. dermatologically tested.