Roofing Description Specialty additives to improve the quality, durability, and functionality of polymeric roofing materials. Products Therm-Chek®, Akcrostab™, Lankromark™, Lastab™, Interlite™ and Interstab™ Mixed Metal Heat Stabilizers Explore Product Plas-Chek® and Lankroflex™ Epoxy Costabilisers and Secondary Plasticizers Explore Product Micro-Chek® and Intercide™ Antimicrobials Explore Product Petrac Waxes & Fatty Acids Explore Product Lankromark™ LE – Liquid Phosphites Explore Product