There are many different treatments and products to kill termites. The first question is: what type of termite are you targeting? Broadly speaking, termites come in two categories: subterranean or drywood. Subterranean termites are typically eliminated by using a liquid termiticide applied around the foundation of the home. Dywood termites are typically eradicated by the use of a fumigant. Fumigants cannot be purchased by the general public. However, liquid termiticides can. In general, it is always advisable to call a professional for the proper species identification and treatment recommendation.