For more than 17 years, secure set has been a reliable and trusted partner to the electric utility, communication and transportation industries. secure set is now available for home diy and commercial use. it comes in 5 sizes, single post, 5 post, 10 post, 15 post and 20 post kits (standard 4×4 posts). secure set is an alternative to traditional concrete, works extremely fast, sets in minutes, not days. as a polyurethane closed cell foam, secure set is waterproof, protecting your posts below ground line, and can be installed in temperatures ranging from 0° to 100° f.