Originally Posted by Bobby Ogage:
Kitty litter contains silica gel, and its the silica gel that adsorbs the moisture. Silica gel absorbs moisture by capillary action because its micro-structure is riddled with canals. Applying a coating over kitty litter ballast should substantially cut down on its moisture absorption, but not all of it.
In its natural state (no coating), silica gel can absorb up to 40% of its weight in moisture. By the way, silica gel is odorless, non-flammable and chemically harmless to humans even though there may be a jolly roger on its package. The jolly roger is there to prevent choking because kids think the silica gel packets are candy.
If the cat uses your layout as a toilet, loose the cat and get a gold fish.
Not all kitty litter contains silica gel and there are several different types out there.
http://en.wikipedia.org/wiki/Kitty_litter
And again, the cat will not pee on your track because you used kitty litter for ballast, they like to use a soft easily dug material !
To call people cheap as several have here is a little petty, how much I spend on my layout and how I save money here or there to save a buck or two is my business. I don't spend thousands of dollars on it, maybe 500-700 a year at most total on everything if that much. If I save a buck on scenery then I have a buck to spend on the trains themselves. To hear some of you guys complain about someone using kitty litter you'd think you hold stock in a model ballast company!
Must be nice to have a lot of money!
Whats next, call me cheap because I make trees out of natural materials instead of buying them? Using real sand and dirt as ground cover? What about using Elmers glue instead of a proper ballast cement? (Personally I use a thinned Romans Wallpaper Paste from Home depot for gluing scenic materials).
I think making a great looking layout from materials not normally used for layout building beats a great looking layout built using ready made LHS bought stuff, shows better modeling skills in my opinion!
If you want to use kitty litter go ahead, if you don't like the look you can always change it, it's not like none of us have ever had to rip out our handiwork to correct something we didn't like or have turn out as good as we hoped.
Jerry