When installing siding on the outside of an RV or trailer, it is important to use the proper trim for the job. The Auto Molding Edge Trim for RV trailers from Hemet Valley RV is designed to use during an RV siding installation project. It will complete the look of your new siding and tie it all together. Hemet Valley RV offers a wide range of trim molds for RVs and trailers. You can browse through our selection here and order your new siding options today.