Bor8rod 1/2"X2"-Solid Wood Preservative Bor8rods will stop existing rot and prevent its return for at least 10 years. Bor8rods are inserted into drilled holes in wood that is vulnerable to attack by insects or decay. Safe and Easy to use. Bor8rods can be used as a preventative treatment or as a supplemental treatment after decay has occu Over 30 years of documented efficacy.