Harcon | KeeLine Life Line System for Membrane Roofs KeeLine® Horizontal Lifeline system has been redesigned to allow easy installation on bitumen membrane roofs. KeeLine® wire-based lifeline system provides continuous fall protection and is ideal for roofs where guardrails are not suitable or for when a virtually invisible solution is required. The system offers uninterrupted safety for up to three users, allowing them to move freely around the roof for maintenance, inspection or repair work. For more information visit harcongroup.com