Door sills are relatively flat so you should be G2G. I've actually installed it on the left side of out washing machine and right side of the dryer-.....it's a tight snug fit into the millwork so I PPF'ed it for good measure. Flats are easy. However, I attempted to line my snowblower chute and auger housing, if not the outside bucket and this get's challenging with curves and not flat metal. YMMV so good luck. The material is not cheap so I'd cut a small piece and find a test piece similar to whatever material you will be working on
