What substance is used to lubricate the zipper on an anti-exposure coverall?

• A. Paraffin Wax
• B. Petroleum jelly
• C. Grease
• D. Silicone spray

Answer: (A)

Lubricating the zipper on an anti-exposure coverall needs a substance that stays inert, doesn’t leave a heavy oily film, and won’t degrade the suit materials or contaminate the wearer. Paraffin wax fits that requirement well. It provides a light, dry slick that reduces friction and prevents the zipper from binding, even in cold or harsh chemical environments. It also won’t leave greasy residue that could trap dirt or transfer contaminants to the suit or skin, and it’s generally compatible with the fabrics and plastics used in protective gear.

Petroleum jelly and grease are thick and oily, so they can attract dust and debris and may interfere with the suit’s materials or decontamination processes. Silicone spray can leave a slippery film and might interact unfavorably with some plastics or elastomers used in protective gear. So paraffin wax is the preferred choice for this application. Apply a small amount to the zipper teeth and work it in by moving the zipper a few times.