How To Keep Rubber From Dry Rotting [work]

Using the right conditioner creates a barrier against oxygen and sunlight.

For long-term storage of seals or hoses, apply a thin layer of dielectric silicone grease, wrap in aluminum foil (blocks light and oxygen), then seal in a Ziploc bag.

Dry rot is the silent killer of rubber. You’ve seen it: the cracked sidewall of a spare tire, the brittle seal on a refrigerator door, or the crumbling handle on a pair of pliers. Technically, "dry rot" is a misnomer—it’s not a fungus. It’s . When rubber is exposed to oxygen, ozone, UV light, and heat over time, its polymer chains break down, causing it to harden, shrink, and crack. how to keep rubber from dry rotting

Most "rubber conditioners" sold in auto stores are short-term cosmetics. The real secret is environmental control. A $5 can of silicone grease and a $10 opaque tote will save you hundreds in replacement parts.

The good news? You can dramatically extend the life of rubber goods. Here is the science-backed strategy to keep rubber flexible and functional. Using the right conditioner creates a barrier against

Clean rubber components at least monthly with a mixture of water and a mild dish soap.

| Rubber Item | Best Practice | |-------------|----------------| | Spare tires | Seal in heavy-duty black trash bag (with oxygen absorber). Store off concrete on wood. | | O-rings & seals | Light coat of silicone grease, in small ziplock bags, in a cool drawer. | | Garden hoses | Coil loosely without kinks, elevate off garage floor. | | Rubber boots | Stuff with newspaper (absorbs moisture), stand upright, away from heater. | | Weatherstripping | Clean with soapy water, dry, apply thin silicone spray, close door lightly (no compression). | You’ve seen it: the cracked sidewall of a

If a part feels or spongy , it’s breaking down chemically—no product will save it. Replace immediately. If it’s just dry (white powdery bloom or slight stiffness), a wipe with 303 or silicone grease can restore flexibility for years.