Care And Cleaning

Cluster Box Units are simple to maintain and clean. Due to the durable nature of aerospace-grade aluminum and the weather-proof powder-coating, these units will resist erosion, scratching and peeling year after year. However, proper care and cleaning will keep your unit looking pristine and prevent environmental buildup.

Basic Mailbox Cleaning

  • Use a soft cloth dampened with a mild detergent or a properly diluted, biodegradable, water-based cleanser such as Simple Green™.
  • Avoid using abrasive cleaners such as Comet™ or Brillo Pads™, as they may scratch the surface of your CBU.
  • Simply wipe off the surface from top to bottom to avoid run-down.
  • Rinse with plain water and dry with a clean, soft cloth.
  • Avoid cleaning during extreme temperature conditions.

Basic Hardware Cleaning

If a mailbox lock or door mechanism becomes clogged with ice due to extreme winter conditions, the lock manufacturer suggests using Tri-Flow Superior Lubricant Aerosol™.

  • Spray this lubricant directly into the keyhole and onto the key.
  • Slide the key in and out of the lock several times to spread the lubricant.
  • Do not apply too much product, as a small amount is sufficient.
  • Wipe off any excess lubricant from the lock and key.

CBU Cleaning in Coastal Regions

In foggy coastal regions, frequent cycles of condensation and drying can create a buildup of atmospheric salts and dirt. This requires that cleaning be done more frequently than in non-coastal regions or where rainfall is more frequent.

Removing CBU Mailbox Graffiti

Depending upon the color of your CBU, it may be possible to remove spray painted or marker-applied graffiti from powder-coated surfaces using a mild, petroleum-based solvent, such as mineral spirits, or a stronger cleaner such as Krud Kutter™.

  • Test-clean a small area first for a few seconds at a time. Do not allow the chemical cleaner to remain on surface for an indefinite period, as this may damage the CBU's exterior coating.
  • Remove any cleanser residue with a mild, non-abrasive cleanser, followed by a plain water rinse as noted above. Dry with a clean, soft cloth.