As explained directly above, 3C Plastic Mixing Boards are designed to be durable, meaning that, they're stiff enough to do a good job of allowing the mixing of many different stiff materials and can withstand the harsh edges of hand tools scraping and digging at them but they're not so stiff and thick as to be too heavy for carrying and moving around from job to job! 

Whilst they are designed for mixing soft materials that subsequently harden upon curing like putties & resins (epoxy resin in our case), there's no real reason why the 3C Mixing Boards can't be used for other tasks where a hard-wearing mixing platform  is required. We do occasionally hear of customers using our boards for smoothing out acrylic fillers etc.