[mathmonger]

This is interesting. My instinct says it's hard to beat a toggle bolt in there. Expanding foam isn't going to hold screw threads, right? But then I read the comments and basically people are having a 100% success rate. I'm intrigued.

 

[carpdad]

Foam may hold on to the toggle bolts, just little more surface area, but wet towels and such, I don't think it's a long term solution.

 

[ktkelly]

I'd be much more inclined to use one of these along with a little plastic toggler.



1. https://www.lowes.com/pd/Blue-Hawk-...e-Bolt-Drywall-Anchor-Screws-Included/3385762


2. https://www.lowes.com/pd/TOGGLER-5-...andard-Drywall-Anchor-Screws-Included/3181731


Or one of number 1 and a plain old drywall screw in the second mount hole to just keep the mount from turning round and round.


The big toggle WILL keep the mount attached.