I think using velcro would be a mistake only because, even using the "tooth" side would attract and hold dirt, dust, and be a pain to clean. The moulding I used has worked perfectly during the 2 trips we've taken since I installed it.
Be aware, once you start to place it and put it down, it's on. You can't remove it without damaging the 3M tape. Won't hurt the side of the slide, just the tape.
Steve & Cheryl + Charlie & Casey, our furry kids.
2012 Forrest River Lexington 283ts
Toad, 2013 Subaru XV Crosstrek
Camping trips this year so far...8