Mantis Material: Elevate, Protect, Build.

You might not know its official name, but you’ve almost certainly seen it. Corflute, that lightweight, fluted plastic sheet, is one of those materials that quietly holds the modern world together, from the political sign on a neighbour’s lawn to the protective packaging around a new appliance. It’s so ubiquitous that we often overlook its clever simplicity. At its core, it’s just two flat layers of polypropylene with a wavy inner structure, but this design gives it an incredible strength-to-weight ratio. It's rigid enough to withstand a fair amount of abuse, yet light enough to be carried with one finger.

What I find most compelling about Corflute is its remarkable versatility. It’s the ultimate material for temporary or outdoor uses because it’s waterproof and doesn’t mind being left in the sun for a season or two. This is why it’s the go-to choice for real estate signs, event banners, and even temporary fencing. But its utility extends far beyond advertising. In the workshop, it’s a fantastic material for making jigs or sturdy templates; in the garden, it can be cut and folded into a cold frame to protect seedlings. It’s the kind of material that invites you to be creative, as it’s incredibly easy to cut with a simple craft knife and doesn’t splinter or crack like wood or acrylic.

Of course, like everything, it has its limits. While tough, it’s not indestructible; it can be gouged or bent out of shape if you’re not careful, and its resistance to chemicals is only moderate. For permanent, high-stress structural work, you’d look elsewhere. But for what it does—providing a cheap, durable, and easily replaceable surface—it’s almost perfect. Corflute is the dependable workhorse of the sign-making and DIY world, a simple solution that just works, time and time again. It’s a reminder that the most effective ideas are often the most straightforward.