HYDROX BIO 220 is a biodegradable  sterntube lubricant recommended for use particularly where problems of oil leakage past the sterntube oil seals is being experienced. The product provides:

  • Superior level of lubrication even when water ingress occurs
  • Excellent wear protection
  • Excellent corrosion protection
  • Compatibility with metals commonly used
  • Biodegradability
  • Renewability

HYDROX BIO 220 achieves a biodegradability of greater than 60% in the 28 day OECD 301B and OECD 306 tests and is considered non-toxic in the marine environment based on the following results:

FISH DAPHNIA ALGAE
LC50 exceeds 1000 mg/l EC50 exceeds 1000 mg/l EC50 excedes 1000 mg/l

HYDROX BIO 220 (both neat oil; and also emulsion including 20% water contamination) has been successfully tested by Class and its stability, lubricating and corrosion protection performance has been verified (Lloyds Register Product Verification Certificate No. PVS02 00001/A3).

HYDROX BIO 220 has become widely accepted as the lubricant of choice should vessels require emergency assistance in reducing leakage from the sterntube past a damaged or worn aft seal. It outperforms other competing biodegradable leak reducing lubricants.

When water ingress occurs in sterntubes, HYDROX BIO 220 will absorb any sea or fresh water entering the sterntube to form a fluid and stable emulsion, thereby reducing the risk of free water being present. The emulsion is stable and continues to provide the required lubrication and corrosion protection. Conventional oils do not emulsify in the same way and tend to separate, exposing components to free water and potential wear damage.

In the majority of cases a significant reduction in leakage rate can be achieved, typically up to 70%. The lubricant offers the greatest benefit when used to completely fill the sterntube system.

HYDROX BIO 220 – AT A GLANCE
Description Emulsifiable, biodegradable sterntube lubricant
for use in the event of outboard leakage.
Typical Viscosity (cst @40°C) 220
Viscosity Index 200
Density (kg/ltr@15°C) 0.93
Pour Point IP15 (°C) < –12
Anti corrosion SKF Water Emcor Test Passes
Emulsifiable ✔
Biodegradable and Non-Toxic ✔

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