Mounting plastic tanks

[delitubby]

Advice pls! I'm about to mount a plastic rectangular tank into a v shaped grp hull and wondered what is the best way to support / secure the tank is where it meets the hull. Options I've been working on are either foam bed with sikaflex at join between tank and hull to allow some flex OR foam bed with dense foam gasket at join then exp foamed in to fix sides. Both options would be finally fixed with a grp lip.
Hope this makes sense - any advice welcome pls.

[Nos4r2]

If you're using foam, it'll eventually saturate unless totally encapsulated.

[Searider]

Plywood base laminated to hull. Tank strapped down on to that.

[Jizm]

Bit of rubber under it to absorb shock may help.

[delitubby]

Thanks to all, great advice.

[captnjack]

Originally Posted by Searider

Plywood base laminated to hull. Tank strapped down on to that.

+1 on this
strap it down with a sheet or strips of rubber between the tank and hull.