Hardy Sinkant and Reel Oil he Hardy's Reel Lubricant Oil. To be sure of flawless performance only use your Reel Lubricant Oil for protection on any of your Hardy's reels. Only comes in one size 25ml. Hardy's sinkant lets your leader slip through the water surface tension, allowing nymphs and wet flies to sink quickly and easily to the right depth. To be sure of flawless performance only use Hardy reel oil to lubricate and protect your Hardy reel.