Service labels are stickers that go on or near equipment with information about when they were serviced. It’s important that any service labels that go outside be weatherproof and waterproof. Waterproof will leave the sticker unaffected by water, but weatherproofing will make it capable of resisting damage caused by the weather.
A great option for this is vinyl stickers. A good vinyl sticker will last 3-5 years outdoors, but it’s important to note that some colors may last longer than others. Red is usually the first color to fade, so if you have the option, stick with a basic black/white design. A matte UV vinyl weather proof sticker will be the easiest to write on with any type of pen, and will last 1-2 years. Small, metallic non-intrusive stickers are a popular choice because they look like they came with the equipment to the average customer.
For larger stickers you can include a list of when the equipment was serviced or needs to be serviced next. This will help with liability should anything happen to the unit after you’ve touched it, and can also help raise a home’s value because the new owner will easily be able to see that the unit was regularly maintained. Your stickers should contain your name, company name, logo, website, email, services, and a place to write in when the equipment was last installed or serviced with notes, actions performed, and a date. Be sure to make the text large enough so that your customers can read it easily.