Hi, I am wondering if it is possible to use builders expanding foam to strengthen/prevent crushing (to a certain extent) on your Ø12mm Carbon pultruded tubing?
I made an automated camera dolly/slider for shooting timelapse videos etc and although the tube is strong enough to support the weigth of the camera,lens etc I tend to have to treat it with care when out and about. Firstly,Would filling the tube with expanding foam fulfil this purpose? and secondly, Would the foam split, bulge or otherwise distort the tube? Any help would be greatly appreciated. TIA Hadrian

You could slide another smaller dia tube inside the first giving twice the wall thickness.

I looked at the tubes and they were a near perfect fit together.