A little silicone is needed. Once you have removed the old molding with a razor blade, start at the center of the rear of the top. Then roll the molding on. Do not stretch it on. The molding will shrink and you do not want a gap in the rear. Once you have rolled the molding to the rear of the top you will go beyond the starting point about an 4 inches, then cut the excess. You can use a rubber mallet to tap the molding up so the plastic edge goes deep into the trim. Peel back the molding about 2 feet and re-roll the molding pushing it back as you roll to make it fit tightly together . If you can not get the molding to meet, then cut the excess in small increments, peel back molding about 2 feet and re-roll. Continue this procedure until the ends meet tightly
Peel back the molding about 6″ on both ends, add silicone to the edge of the top and re-roll the molding on to the top. The silicone will keep the molding from shrinking and causing a gap. After you have installed the molding get a pair of pliers and tape the ends; The tape will keep the pliers from cutting the molding, squeeze the part of the molding that attaches to the top every 6″ to 12″. There are aluminum clips inside the molding that will bend and grip it to the top.