Log End SealDescription Log End Seal Exterior Sealer for Log Ends Log End Seal protects exposed log ends from deterioration due to the elements. Sunlight, wind, rain, snow and ice all play a role in degrading wood surfaces. This is especially true for log ends where the end grain is exposed and cracks and checks are prone to develop. Even if the ends are coated with a quality stain, the exposed grain of the wood acts like small straws drawing water into the log.