Type 1 Graphite Polystyrene (GPS) vs. Type 2 Polyiso: Which Is Best For Your Project?
Wondering whether Type 1 GPS or Type 2 Polyiso is the better fit for your next project? Check out this side-by-side comparison between Type 1 Graphite Polystyrene (GPS), and Type 2 Polyiso (Polyisocyanurate).