Avid Elixir 5 hydraulic brake caliper repair - pads do not retract when brake is applied

Avid Elixir 5. The problem: the brake pads do not retract when the brake is applied, causing them to rub against the discs all the time despite correct adjustment. The problem is worn piston seals. The solution is to replace the seals with new ones. Caliper repair kit 11.5015.032.000 solves the problem.