Maintenance Guide

Powder Coated Products

The standard range of mailboxes supplied by The Safety Letterbox Company are manufactured using aluminium or zintec steel and then finished with a polyester powder coated paint. In order to keep the mailbox appearance as good as possible, it is highly recommended that the box is washed using a wet soapy cloth 3-4 times a year. Failure to clean your mailbox regularly may lead to corrosive attacks that can tarnish the overall look of the mailbox and durability of the box against weather

Stainless Steel

The stainless steel mailboxes supplied by The Safety Letterbox Company must be maintained in order to not get rust-like tempering. It is recommended that the surface of stainless steel should be cleaned on a regular basis and additionally wiped with an acid-free oil at least 3-4 times a year.

If the stainless steel is not cleaned then tempering may occur, this can be removed using a very fine abrasive agent that will restore the material back to a previous state. However, it is important that the box is cleaned afterwards on a regular basis and oiled multiple times a year.

Under no circumstances are steel wool, steel brushes or similar items to be used for cleaning as they damage the protective surface and therefore enable a rust film to form due to abrasion.


Mailbox locks should be lubricated 1-2 times a year to avoid general wear and jarring sounds using a lock spray. If the mailbox locks freezes during winter then lock oil may be used to free the lock.

Filiform Corrosion

In cases of mailboxes being installed in a coastal location with corrosive air (industrial waste gases), ‘filiform corrosion’ can arise. If this issue is relevant to the area that the mailboxes are to be installed in, an alternative such as adding a clear lacquer finish to the mailbox during manufacturing should be planned. Ask your advisor from The Safety Letterbox Company regarding this. Inadequate cleaning and care of the surfaces as well as scratches can favor the spread of filiform corrosion.
NB: For mailboxes that contain multiple materials, each part must be maintained as described above.

safety letterbox mailbox Grid Icon

Can we help with

Simply complete and submit the form and we will get back in touch to talk through your requirements.