Will Rainx keep frost and ice from building up in older non-selfdefrosting freezers?

No, Rainx is primarily designed to repel water and improve visibility during rainy conditions on windshields and other glass surfaces. It is not effective in preventing frost and ice buildup in freezers or any other cold environments. Frost and ice formation occur due to the freezing of water vapor, whereas Rainx works by creating a hydrophobic layer that causes water to bead and roll off of glass surfaces. To prevent frost and ice buildup in freezers, consider utilizing frost-free freezers (self-defrosting) or manually defrosting your freezer regularly.