i used this to attach a flow controller and isolating switch to the side of my van. Was a bit sceptical at first but it has held up for over a year now.http://www.ebay.co.uk/itm/Black-Extra-Strong-Permanent-Double-Sided-Self-Adhesive-Foam-Car-Trim-Body-Tape-/261823609356?var=560682397338&hash=item3cf5e73a0c:m:mrrWH8RN924cH0I0eOs9VQg I got the 50mm size and covered the whole of the back of the flow controller and just stuck it on.