Industry Leading Durability<br>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. These signs have a 2-year outdoor warranty, but most signs last longer. Our Please Do Not Flush Baby Wipes signs are better than comparable styrene signs, which become brittle and break.<br><br>USA’s Oldest Sign Manufacturer<br>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.<br><br>Signs Give a Warning – So You Don’t Have To<br>Personally warning people is not always the right solution. Say it with signs! Signs are the safest and the most effective medium to reach out to maximum people on your property.</br>