Superior Signs 232 Main St, Monroe, CT06468 Superior Signs offers signage for storefronts, real estate, election campaigns, job sites and more. Signs can be…More back-lit, carved, A-frame, among other options. Also available are vehicle lettering and magnets, trade-show banners and vinyl decals. Items are custom made and designed to withstand high impact. Plus the company is an authorized dealer for Rhino Shelter. Look for the orange-red sign on a corrugated building tucked behind Sippin Energy Products.