I would like to make my own storage box since I can't find the size I want in the market. I'm using polypropylene boards to make the box. Polypropylene corrugated board: http://www.made-in-china.com/image/2f0j00WveQpPYzuUrkM/PP-Corrugated-Board-China-Made-.jpg I've used the 5 minute epoxy to glue the sides to make a box and so far they are good. I've googled that the epoxy will not last long if I use it on polypropylene. What should I do? Should i get another type of epoxy which has a longer curing time so that I can mix the epoxy well and get a stronger bond? I know that 3M has a product which can bond polypropylene, the DP-8005/8010 but I need the set of gun applicator and other stuff which is very expensive which will cost me more than my one month's allowance. Any suggestions? Thanks! EDIT: Guys..polypropylene is different..please visit http://www.stealth316.com/2-dp8005.htm "Polypropylene and polyethylene are called "low energy" or "non-stick" plastics. Despite their widespread usefulness, "low energy" plastics have a quality that can make them hard to work with - they are difficult to seal or bond using commonly available sealant adhesives. Cyanoacrylate, epoxy, polyurethane, silicone (RTV for example), and most acrylic adhesives do not stick to polypropylene and polyethylene. I have personally verified this with cyanoacrylate ("Superglue"), two-part epoxy, and several types of silicone RTV adhesives. In the past, PP and PE had to be surface treated to convert their low-energy polymer into a higher-energy state in order to improve bonding." So..NO!! Polypropylene is NOT a type of normal plastics! I've tried superglue and it can't even bond the polypropylene!! Disappointed with the answers..