The white substance that can sometimes be observed on refrigerator door seals is typically due to a phenomenon called "blooming." Refrigerator door seals, also known as gaskets, are usually made of rubber or a similar flexible material. Blooming occurs when the rubber material releases certain additives or plasticizers, causing them to migrate to the surface.
There are a few reasons why blooming may happen:
Temperature fluctuations: Refrigerators go through cycles of cooling and defrosting, which can cause temperature changes inside the appliance. These temperature fluctuations may accelerate the migration of additives and plasticizers to the surface of the rubber gasket.
Humidity and air exposure: Humidity and exposure to air can also play a role in the blooming process. High humidity levels can speed up the release of substances from the rubber, and exposure to air allows these substances to oxidize and turn white.
Age and usage: The age of the refrigerator gasket and how frequently the refrigerator door is opened and closed can influence the occurrence of blooming. Older gaskets or those subjected to frequent use may be more prone to this phenomenon.
It's important to note that while blooming can be unsightly, it is generally harmless and doesn't pose any health risks. It's simply a cosmetic issue. However, if the gasket becomes damaged, cracked, or loses its ability to seal properly, it should be replaced to maintain the refrigerator's energy efficiency and cooling performance.
To prevent or minimize blooming on your refrigerator door seal, you can try the following tips:
Regular cleaning: Clean the gasket regularly using a mild detergent or soap and water. Avoid using harsh chemicals that might damage the rubber.
Check for damage: Inspect the gasket periodically for any signs of damage or wear. If you notice cracks or tears, consider replacing the gasket.
Proper usage: Be mindful of how frequently you open and close the refrigerator door. Limiting unnecessary openings can help reduce temperature fluctuations and, consequently, blooming.
Maintain humidity levels: If possible, control the humidity levels in the area where the refrigerator is located. Lower humidity may slow down the blooming process.
Remember that refrigerator door seals are replaceable, so if the blooming becomes too unsightly or the gasket no longer functions correctly, you can contact the refrigerator manufacturer or a repair professional to get a replacement gasket.