PolyEngrave Signs are our most durable sign and will withstand the harshest weather and vandal prone areas. They are made from 3 layers of High Density Polyethylene (recycled milk bottles). These signs will not crack or chip, and are UV stabilized to resist fading. Our PolyEngrave signs are perfect for Municipal Signs, Churches, Schools, Apartments & Subdivisions, just about anything needing to last... | Market Street Messageboard signs are perfect for businesses, churches, schools and more! These promotional signs include a unique changeable magnetic message board and complete set of magnetic letters. Made from 1" building grade PVC, they are available in 4 different sizes to suit a variety of needs. An optional aluminum framed acrylic vandal cover is available. |