We recommend this caulking for assembling door jambs, installing thresholds, sealing trim, and other wood or glass accessories. We recommend the CLEAR version. After assembling the jamb, make sure to take clean wet rags and clean off all of the excess caulking, (multiple times) since it is water soluble until it cures in a few days. The CLEAR Dap 230 comes out of the tube white but will change to a translucent "clear" once it is cured. There are cheaper substitutes, such as Alex-Plus by Dap, but don't waste your time. Nothing sticks to wood, glass, and metal as well as Dap 230.