Puttylastic is an excellent, all-weather, bronze-colored log home construction caulk. Unlike other caulks, it is not as sensitive to adverse weather conditions, has better tube stability, and possesses qualities that are more suited to the unique nature of log homes. Puttylastic is designed to “cure” extremely slow. Its distinguishing feature is its ability to provide a soft, mobile seal. Puttylastic is designed for internal sealing. Rubberized caulks rely on two-point contact for maximum stretch, flexibility, and seal. But any caulk used for internal joint sealing will encounter multiple points of contact, not the two point contact required for the successful seal of a rubberized caulk. Unlike harder rubberized caulks, Puttylastic is naturally suited for multiple point sealing because of its semi-fluid, self-sealing nature that tends to flow with log movement instead of resisting it. Puttylastic is freeze-thaw stable and has a 5 year shelf life when properly stored. Clean-up: Mineral spirits. Made in the USA. Technical Data | MSDS