Soil termite treatment is a toxin bearing product applied to the soil under or near a structure meant to control or eliminate the infiltration of below ground termites into the proposed structure.  The termite pre-treatment material should be applied to the soil and soak into the voids to then bond to the soil. The treatment tends to be easier to apply to non-cohesive soils than cohesive ones because there are larger voids in the soil. The treatment cannot be applied if the soil substrate is wet or frozen.