My 1974 C22 has a fine-line crack across the floor of the cockpit. Its had it for years, but up until this fall it appeared to be merely cosmetic limited to the gel coat. This fall after hosing it down with water, I found that water had seeped into the crack when I was sponging it dry. When it was seemingly dry, then I stepped near the crack, water oozed out. It is now covered and hopefully will dry well over winter. What can I do to seal the crack and still leave it looking presentable? Dick