Suggested - Keel Hull Joint Crack Filler

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D

Ducati

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Nov 19, 2008
380
Boatless Boatless Annapolis
Looking for suggestions as to what filler I should use to fill the crack between the keel and hull.

I have a tube of Sikaflex that was from last season however it was left on the boat and was frozen over the winter.

Thank you
 
RAD

RAD

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Jun 3, 2004
2,330
Catalina 30 Bay Shore, N.Y.
3m 5200 and make sure the surface is prepped correctly
 
Robert M.

Robert M.

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Mar 13, 2012
34
Sabre 28 MKII Georgetown Yacht Basin, MD
Would like more details. Is the "crack" a designed seam between hull and keel? Or is it a failure in the fiberglass laminate or resin putty that covers the seam?
 
D

Ducati

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Nov 19, 2008
380
Boatless Boatless Annapolis
Joint Crack

Question: Is the "crack" a designed seam between hull and keel? Or is it a failure in the fiberglass laminate or resin putty that covers the seam?

The crack location is the seam connection between the top of the lead keel and where it meets the fiberglass hull.

It's a cosmetic repair. The keel isn't going anywhere...not yet at least.

Thanks
 
C

Crazy Dave Condon

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Jun 8, 2004
10,400
-na -NA Anywhere USA
When a keel is attached to the hull, generally most manufacturers use 3M 5200 as a permanent sealant. For a proper seal, it is best once applied to allow the boat to sit for 5-7 days for curing of the 3M 5200. However clean the excess off. Some manufuactures will then either glass and/por epoxy over the seal for cosmetics.

If water is coming into the bilge and it is determined to be a bad seal, then of course you need to find where the water is coming from. In some cases the keel has to come off and be relaid
 
RAD

RAD

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Jun 3, 2004
2,330
Catalina 30 Bay Shore, N.Y.
Ducati said:
Question: Is the "crack" a designed seam between hull and keel? Or is it a failure in the fiberglass laminate or resin putty that covers the seam?

The crack location is the seam connection between the top of the lead keel and where it meets the fiberglass hull.

It's a cosmetic repair. The keel isn't going anywhere...not yet at least.

Thanks
Click to expand
sounds like the epoxy to fair the keel to the hull needs a little fixing
like you said "cosmetic"
I'd use G Flex epoxy by West Systems....I had a similar situation and used plain ol West System epoxy and it lasted 6 years so last year I put the Flex stuff on and will wait and see
 
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