Are the staples rust-proof?

All genuine Arrow Staples have a galvanized coating that will help resist rust, but not prevent it. In order to obtain rust proofing you will need to purchase Arrow genuine staples in Stainless Steel or Monel® Varieties. Monel® Staples (66% nickel & 33% copper) are not only 100% rust proof but they also won't have a galvanic reaction with some metals as Stainless Steel staples may. For the ultimate in rust proof staples always request Monel® staples. Monel® is a registered trademark of the ®Inco family of companies.