"THIS STUFF WORKS" Extracted from the suffering sinuses of free-range male frogs as fast as our wranglers can round em up and herd em in. Just kidding!! It is a sophisticated, specially secret formulated, room temperature curing, one-part green liquid plastic with unique properties that make it the ideal solution for improving traction on model railroads, slot cars, and numerous other quirky little problems left to your creative fertile imagination. Using a toothpick, apply one drop to a rotating driver (power the belly-up loco). BULLFROG SNOT forms a thin, very grippy plastic traction tyre, virtually invisible after it cures. Allow the wheels to continue to turn as you watch BULLFROG SNOT cure, let the laws of physics create a nice round tyre. Apply just enough to evenly cover the surface with a thin coat - too much makes a mess. Let it cure overnight, or at least several hours. BULLFROG SNOT is tough, durable, and long lasting, but like any tyre will eventually wear out. Remove the old with a hobby knife, and re-tyre as before. The 30ml jar contains 100s of tyres, more than plenty for your entire power roster several times over, and some to share with your friends too. BULLFROG SNOT works for any engine, any scale. SNOT = SAND With BULLFROG SNOT, you have "scale sand". Grip when you need it. Starting a train, climbing a grade, or working a long cut in the yard. It will change the way you run your trains! International buyers please note: Shipping is $13.95 USPS Global Priority Mail. Your purchase WILL be credited to the correct amount. See BULLFROG SNOT in action, search YouTube for "Installing BULLFROG SNOT is easy"