Industry Leading Durability
Our Plastic signs are made from 55 mils thick, tear-resistant HDPE (high density polyethylene) material. These plastic signs are perfect for indoors and limited outdoor use. but most signs last longer. Our signs are laminated for enhanced performance. You can clean off graffiti and your graphics are protected. Biohazard - Authorized Personnel Only signs are better than comparable styrene signs, which become brittle and break.

USA’s Oldest Sign Manufacturer
Family owned since 1918, we take immense pride in our signage. Being one of the oldest certainly means we know this business in and out. Our South Dakota factory is the oldest manufacturer of metal signs in the USA. We have been an integral part of safety and convenience our signs have provided over the years.

Signs Give a Warning – So You Don’t Have To
Let this sign do the talking! This unambiguous message is not open to interpretation and, importantly, avoid a personal confrontation with the trespasser.

Multiple Signs
Anyone accessing your property needs to see at least one sign. As a result, many property owners post multiple signs. They let intruders know that you are serious and people that violate your trespassing rules seriously. In some cases, a large sign is used on the perimeter of the property and then a reminder message is posted along any path leading to your home or property.