Caulking is much like chinking in that its purpose is to seal the home to prevent energy loss. However, it is also used to seal the “upchecks” in logs to prevent water infiltration. Neglecting this can cause major log or timber rot. Repairing rotted areas can be extremely costly. There are also a variety of caulks with a variety of colors to best match your wood surfaces. Caulking is also widely used in milled log homes to seal all gaps between logs.