Osmose Wood Preserving, Inc.
Manufactures and supplies chemicals and technology for the protection of wood against fungal decay and insect attack including Advance Guard^TMpressure-treated wood products using Tim-Bor^® sodium-borate. Transitioning certain uses of their conventional CCA-preservative toward production of NatureWood^® brand pressure-treated wood products, made without chromium or arsenic, approved by the American Wood Preservers' Association for certain applications.

Valhalla Wood Preservatives, Ltd.
Makers of LifeTime Wood Treatment, claimed to be a highly effective wood treatment made up of naturally occurring plant and mineral substances. Their 60 year old recipe has been handed down through generations of family craftsmen. In 1990, a landscape architect, impressed with the product used on a fence in a major development project, convinced Valhalla to make their product more available. Norwest Labs tested and found no toxic residues from fence base soil samples.