Sealed Systems

Thor-Lube is a sealed stern tube bearing system that eliminates pollution concerns relating to stern tube oil. Similar in principle to oil-lubricated systems, the Thor-Lube stern tube bearing system consists of proven non-metallic Thordon XL bearings, TL3G, a biodegradable water-based lubricant specifically formulated to replace stern tube oil, and a Thor-Lube circulation and monitoring package.

Thordon's TL3G lubricant has recently received Environment Canada's Environmental Technology Verification (ETV) certificate. Independent laboratory testing - part of the ETV verification process - confirmed that TL3G lubricant conforms to the United States Clean Water Act under these parameters:
i) it is readily biodegradable to a level greater than 70% after 28 days;
ii) it exhibits water solubility at all compositions (so it will not accumulate on the shoreline or settle in clumps);
iii) it does not form a surface sheen and
iv) it is "relatively harmless" and "practically non-toxic" in two U.S. Environmental Protection Agency (E.P.A.) marine toxicity tests.