Weeping Rudder

[wallandj]

Our sailboat's rudder has begun to weep water from 2-3 small cracks. Noticing it about 6 weeks ago, I removed the emergency tiller cap and looked down the hollow rudderstock and saw water. I sucked the water out of the the rudderstock with a wet/dry vacuum and drilled 6 - 1/8" holes in the rudder for drainage.

Well, 6 weeks later, the rudder is still draining and its now time to go back in the water. The drain holes and cracks dry up when its cool but begin weeping again as soon as it warms up.

Any ideas on how to stopper these holes? Know of any products that will adhere to moist fiberglass? Longer term, how should I go about repairing this problem?

Thanks.

Dave
S/V Horizon