sugested materials for a sealing washer for a keel bolt

[alice_ralphs]

can anybody help me and suggest possible rubbers for a sealing washer for a keel bolt please?

[Zewe]

Swing keel (center board) pivot bolt, or ballast keel to framing?

Randy
Oly, WA

[mareng]

If you have a good mechanical seat and connection, I suggest 3M 5200.

[glynn]

It doesn't matter,its submerged in sea water what type of washer do u use when inserting a keel bolt ie plastic/rubber/stainless steel

[glynn]

I am currently researching for a college assighnment on the same subject i have spent 2 days looking for information and carnt find anything. Neoprene is one of the best rubbers suitable for sea water as all wet suits are manufactured from this

[FAST FRED]

Neoprne is mfg in a variety of densities and would be first choice as keel bolt seal under large washer.

AS NO material is really flat the Neoprene will take out many of the surface imperfections and allow the load to be spread over the entire washer surface.

Neoprene is excellent on GRP boats to bed any high stress fitting , cleats , anchor retrival gear , anything subject to different loads from different directions.

Use the stiff stuff, just thick enoulgh to take care of surface irregularities or unflatness ..



FAST FRED

[glynn]

Thanks for the conformation much appreciated

[alice_ralphs]

im not to sure it is for a college project and the only information im given is find out "a good quality rubber" and its for a "sealing washer for keel bolts" so im not sure were the bolts even are because im not familure with boats.

[alice_ralphs]

hi
i was just wondering if anybody could also help me because im not even sure what the keel bolts do or what they are? this must sound realy ignorant to people who know about it but it just completly looses me.

[Corwperal]

Hi alice,
Am I right in saying that this a college project? And is this college very protected? I am doing the same as you and am just putting as much information into search engines. Alternativaly you can find a company which sells washers or manufactures them and ask them if they can send you a catologue??

[alice_ralphs]

hi
yeah its a college project and im just strugeling to find information anywere also im limited to the information that i have bin given so im finding it very difficult.i gave looked on websites that sell different products but im just not getting anywere

[glynn]

Dont worry about finding specific sites relating to the washers because there arn't any. I have spent over 25 hrs researching the same thing and have come to the conclusion that the materials used are dependant soley on the individual and the structure of the boat. A washer is not nesersarraly used but instead a large plate is inserted inside the hull with an additional epoxy resin sealent used to secure the hole and any imperfections around the surface area of the plate. If u are still strugling get back in touch ps research chemical compatability sites with a ref to rubber in salt water (brine)