Hairline Cracks in Hall

musolmar · #1 (**permalink**) 08-12-2004

I have a sunfish clone, manufactured back in the late 60''s. I noticed several hairline cracks in its fiberglass hull. It doesn''t seem to be taking on any water. Any suggestions on what to apply to the hull to prevent the cracks from getting worse and to ward off future leaking. ( I know this not the proper message board for this post, but it was the only one that didn''t throw an error)

39512 · #2 (**permalink**) 08-15-2004

Regarding the hairline cracks in the hull, it is important to identify whether the cracks are in the gelcoat or in the laminate. This can be done by gently sanding the crack and inspecting the layers. If you are sanding through the laminate before the crack disappears, you probably need to perform laminate repair. I use a magnifying glass when I perform this task to get a better view of the area I am trying to repair.

Gelcoat repairs are fairly easy if color match is not a big issue. Laminate repair is somewhat more time consuming and requires a few steps. West System has a number a kits available for these repairs and are available at most chandleries.

Good Luck.

musolmar · #3 (**permalink**) 08-16-2004

I appreciate the info. Thankx

Irwin32 · #4 (**permalink**) 08-22-2004

Chances are VERY good these are gel coat cracks and are not worth worring about. If water is getting inside the hull, you will know it as it will slosh around in there. If it is not getting into the hull, keep sailing and have a good time.

Irwin32 · #5 (**permalink**) 08-22-2004

Oh yeah, how to fix it. I would buy some 3M 5200, put a little on my finger tip, and spread it into the cracks. Done. If you want things to be more asthetically pleasing, you can sand w/ very very fine paper, buy a gel coat repair kit, and attempt to match colors.

All old fiberglass boats have those hairline cracks.