CSL - The Creosote Sweeping Log: for fireplaces and woodstoves is a simple and effective solution for cleaning your chimney, while enjoying your fireplace! CSL burns like a standard fireplace log, while simultaneously reducing dangerous creosote build-up. CSL helps prevent chimney fires if used every 50 fires or at least once a year. <br>CSL burns for approximately 90 minutes. During that time it heats the tar on your chimney wall to an ideal treatment temperature. The smoke from CSL is charged with minerals, which are deposited onto the creosote over several hours. During the next 15 days, the CSL treatment will continue to work and the creosote will gradually become brittle and break away. Any deposits that remain, will be rendered less flammable.<br>CSL is designed to work on any kind of chimney, including stainless steel. CSL may also be used in combination wood/oil burning furnaces.<br><br>CSL is a CSIA (Chimney Safety Institute of America) accepted product and is approved by UL.