When making insulated track rails what kind of material do you use? In the past I have use black electrical tape, or cardboard from shirt boxes. Any other ideas?
I use black pressboard, like this: http://www.officedepot.com/a/products/394329/Office-Depot-60percent-Recycled-Pressboard-Report/?cm_mmc=Mercent-_-Google-_-Filing_and_Storage-_-394329
Pressboard is a traditional electrical insulator and not easily penetrated by the tabs that hold the rails to the ties: http://en.wikipedia.org/wiki/Pressboard
Also, if you have rusty or damaged track sections around, you can you can take them apart and use the fiber insulators.
I often use 65, 67 or 110 pound cardstock scraps to insulate. Most commonly I use 65lb because my printer can handle it. I do a quick measuring job and doodle-up some partitioned rectangles using photoshop. Then I have score-lines and everything’s the right size. I also like to use bamboo BBQ skewers in place of plastic or fiber pins on Std. Ga. track.
Becky
I use the insulation pieces from old / unusable track.