Micro-Mark MTP Moldable Thermoplastic Jumbo, 39.25" X 59”, better than Worbla, melts at lower temperature, form with greater detail
Moldable Plastic Sheets
Moldable plastic - YouTube
Amazon.com: 5 Pack 12x12x.062 ABS Plastic Sheets, Moldable Plastic Sheets, Great for DIY Projects, High Tensile and Impact Strength Plastic, Made in USA : Industrial & Scientific