Rubber or Cork ballast???

Scenic Express has rubber. You might also look at their nutshell ballast as well if low weight was one of your criteria.

Midwest Products in Hobart,IN.,sells  O Scale cork roadbed, I bought a number of boxes from Ross Custom Switches. If you have switches you can use 1/4 inch Lauan (underlayment) sheet, use the switch to create a template by drawing the switch shape on the Lauan and cut it out using a scroll or jig saw . The overall height of both the Lauan and the Midwest Products cork roadbed are basically the same. The Lauan can be purchased at a lumber yard, Lowes or Menards, the 4FT. x 8FT Sheet was reasonably priced. I used wire nails to secure the Lauan switch shape cutout and Elmer's white glue for attachment to the plywood train board. I used Gargrave's Phantom tin plate track and switches Gargraves and Ross. Secure the track and switches using blackened #4x3/4 pan head sheet metal screws from Micro Fasteners item number SMPPK0412.

@Former Member posted:

Scenic Express has rubber. You might also look at their nutshell ballast as well if low weight was one of your criteria.

Thanks

I'll give Jim Elster a call in the morning

Charles Ro has the Midwest Cork . Check the website for in stock.

With a good belt/disk sander, I fabricated cork Road Bed for this Atlas Switch combination.

A lot of switches one after another, is that area prone to derailment?

The question was cork ballast, I'm interested too. Not roadbed.