Synthetic Grease Test: One Bead on Upright Steel

A bare steel plate on the bench, held upright. One bead of GNP Defend Synthetic Grease is squeezed straight from the bottle onto the vertical face. The plate stays upright for several seconds and the bead stays exactly where it landed: no run, no drip, no sag down the steel. One fingertip pass spreads the bead into a thin, even film, and the plate is laid flat to show it. That is the property that separates grease from oil. Oil is meant to flow into tight tolerances and cover moving parts; grease is meant to stay on the high-pressure contact points that would throw oil off, which is why it belongs on slide rails, bolt locking lugs, cam pins and the places that see metal-on-metal load. Synthetic Grease holds that film through heavy use and blocks moisture from the steel underneath, so the parts you grease stay greased between cleanings. Use a thin film; more is not better.