Sealing Leaks in Lewmar “Old Standard” Portlights

By: Tim Porter, C-380 #199 “Serendipity”
Mainsheet – August 2010

If you have an older Catalina, your Lewmar portlights are likely what are known as the “Old Standard” portlight. (note: these are NOT the overhead hatches, which are “Ocean” series hatches) These portlights can be identified by the split in the upper and lower frames on each side. If you have these portlights, you have probably been battling hard-to-find leaks. [My 1999 vintage C380, #194 still has the “Old Standard” ports. – Steve]

Most of these leaks are not from the seal or the latches, but rather from those splits in the frame I noted above. The frame itself is a hollow extrusion and the two halves are joined with a plastic insert that is pressed into them which is then staked into place by dimpling the backside of the frame. Over time, the sun and age takes its toll

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