S-100 Finish Remover is an environmentally friendly water-based solvent that removes many oil and water-borne finishes from logs, siding, and decks. S-100 will not darken or discolor the wood, will not corrode or discolor metal surfaces, nor will it harm log home chinking or sealants. Although it is effective for removing most log home finishes, there are some high performance coatings that may require a more aggressive chemical stripper.