hi Steve, The Teflon tape is from Hyde Company product number 21-6A, its a 6 mil tape with acrylic adhesive, mine cost about $3. Note: be sure that the surface is completely clean. Then I put a closed cell rubber 0.5 inch wide and 0.375 inch thick with adhesive back on the back side of the aft sliding hatch so it had something to go thumb on, instead of going so far it would hit the mast step. After checking the different types available I found the same rubberized product at Home depot at better that half of the marine store price. This makes for a smooth solid feel. I am still looking for a few things.. One is a flexible solar that if memory serves me here was only 24 by 20. It was NOT (engineer on French registered boat) according to the owners the standard "terrestrial type" made with silicone but made with Germanium (spelling) and had better than 2 and 1/2 time the out put. Although that alone makes it sound as if I might need congress to loan me the money for them. If you see this let me know. At the moment I am using a 48 watt unit that fits across the hatch and I it works fantastic, never run low, and I have the radio on all the time, a small home made solid state cooler and an anchor light all night but it is clumsy looking and bulky to handle. I just figured out how to put these photo's on the web so I can now share them. MC