Tunnel Fill is placed in the burrowing animal’s tunnel such as a gopher, mole, ground squirrel or other animal digging in the landscape. No chemicals, pesticides or poisons are used in making this expanding material. Using a garden hose or other water source force the product down the tunnel or burrow for several minutes with a high water flow. After product is washed down turn the water flow down to low or medium flow for another 5-7 minutes. If product has not filled to the surface add more product and repeat procedure until full.