LAM CRP-1 |FM 4910 Listed Enhanced Performance PVC-based Sheet LAM CRP-1’s proprietary formulation provides an FM 4910 rated PVC-based sheet with improved surface gloss and easier weldability compared to PVC-C. Its temperature resistance exceeds that of standard PVC compounds and withstands the requirements of typical wet bench cabinetry and enclosures. LAM CRP-1’s high gloss, and its consistent surface and color quality also afford exceptional long-lasting clean-room aesthetics over PVC-C based sheet materials. Lamcorr offers its unique JSR rod to weld LAM CRP-1 to LAM PVDF sheet and components.