Disclosed are methods and devices for sealing components and areas of the food zone of an ice machine, including systems that transport fluids and devices used for the production and harvest of ice. Due to the form, fit, and function of food zone components, gaps or pathways may exist in that unwanted fluids or solids may enter the food zone. Pathways for contamination to enter a food zone include: refrigeration tubing, water supply, drain tubing, electrical connections, and devices for antimicrobial protection, automatic cleaning systems, ice harvest assist, and transportation of ice from the ice making surface to the storage bin. Methods and devices of creating contaminant-proof barriers are disclosed, including: sealing, trapping, gasketing and/or creating a positive pressure within the food zone, alone or in combination. The methods and devices can be used in a systematic arrangement to create an essentially contaminant-proof ice machine food zone.