Jecta Diffusible Gel, (40% DOT), is easily injected into the wood pole treatment hole using a caulking gun. This Gel formula quickly begins diffusing into the heartwood center of the pole and prevents future decay and or insect attack. Gel formulas diffuse more quickly than do solid DOT rods, and the gel stays in place in voids, were a liquid preservative might run out. Jecta is also a good choice for wood bridge maintenance and log home repair.