TSP Cleaner (Trisodium Phosphate) is a heavy duty wood cleaner which works great on logs by suspending oil and grease for more effective cleaning. Economical and easy to mix. Made in the USA. Technical Data | SDS
Notes: Rinse well with fresh water to insure all the TSP is rinsed away. Otherwise, a salt-like residue will remain that can leave a hazy gray sheen on the logs. If stain is applied over the residue, the gray sheen will be locked beneath the finish. You will have to strip the finish in order to remove it.
If used in heavy amounts, it can pull out the reddish undertones in Red Pine (Norway Pine). This red undertone can react with yellow finishes to give stains more of an orange appearance.
Sashco does not recommend TSP for use with their log products. Instead, they recommend using water only if possible. If you have dirt, mildew, etc. on the logs sometimes it is best to use CPR at the Cleaner Strength.