Some people use vegetable oil, coconut oil, or vaseline. Don't. These oils go rancid (attracting dirt and mold), and petroleum jelly causes swelling in some rubber formulations.
"Dry rot" in rubber is not a biological decay like wood rot; it is a chemical breakdown where the essential oils and plasticizers that keep rubber flexible evaporate or degrade . This process, often called photodegradation how to keep rubber from dry rotting work
Dry rot is not actually a biological rot caused by fungi. It is a chemical breakdown caused by evaporation and environmental exposure. Several factors accelerate this decline: Some people use vegetable oil, coconut oil, or vaseline
If your equipment spends all day in the sun, you need a barrier. However, (often found in cheap "tire shine" products). These may look good for a day, but the silicone and petroleum distillates can actually speed up the drying process over time. "Dry rot" in rubber is not a biological