Quote Originally Posted by Mentat View Post
Black pond expanding foam works. Spray, let dry, carve fall. Once done and tested can cover with an oatmeal consistency slush made of Titebond III and shredded coco fiber.
I thought that using wood glue and/or silicone with running water will eventually cause it to fade or completely be washed away until only the foam spray is left? I thought you had to use drylok or hydraulic cement for waterfalls?