About WOODLIFE® CreoCoat® Black Wood Preservative Give exterior wood a solid-black protective finish with Rust-Oleum® Wolman™ WOODLIFE® CreoCoat® Black Wood Preservative. This unique formula contains an insecticide and nearly double the fungicide of standard sealers. It’s an ideal substitute for creosote-based coatings. EPA-registered, insecticidal preservative prohibits termite damage, rot and decay. Inhibits surface growth of fungal organisms: mold, mildew and staining fungi. Imparts a solid black finish when applied as directed.