Hey, On my truck I have a drop in liner, and on the out most coners i have loop things that i use to tie stuff down, and they hold the liner in place. my current issue is that when it gets hot outside. the liner expands and ripples up in the middle. What can i do to anchor the sides of the liner down( it comes up on top of the bed rail) besides adding more loop anchors.

 

You can try some 3M double sided tape and put it in between the liner and the bed rail.

 

Ya think that stuff is strong enough? I was thinking maybe some sort of a bar on top but i think it wold look hack.

 

It's pretty strong stuff, just make sure it's the automotive grade used to stick on mouldings and stuff like that. You could screw some diamond plate or something similar on top of the rails too. The liner is probably flexing cause its too tight, maybe you can enlage the holes around the anchors?

 

the holes are about 1 inch diameter, and the anchor's bolt is about 1/4 inch. When it was fully hot I loosend the anchors and tried to flatten the bumps and then tighten down the anchors again. Now when its cooler like at night, the ripples are practcly non existant, but when hot they are somewhat surpressed.. I'll check with a auto parts place for the 3m stuff and I'll put some weights on the ripples to keep it down... then worst comes to worse ill put some screws in haha.