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Thread: Sealant
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05-15-2020, 06:48 AM #1Member
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Sealant
I am going to be installing a jack plate on a figerglass hull what is the recommended sealnt to use on the bolt holes . Should I smear sealant covering where the jack plate touches the transom? I have seem 5200 and silicone and every under the sun. Just want to do it right
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05-15-2020, 07:12 AM #25000 RPM
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5200 is a good choice if you never EVER want to remove the jack plate as its a adhesive as well as a sealant. On a Baja I owned with a jack plate that (I had professionally installed) there was a small bead/lip of sealant around the entire plate where it touched the transom which I believe was the result from covering the entire plate area like you referenced. I am not sure what type of sealant was used but it was fairly hard like 5200 but was clear, I do know it wasn't the normal water resistant rubber GE silicone from Home Depot. Not sure what color your hull is but last I knew 5200 didnt come in clear so you may not want the white lip from 5200 around the plate if you go that route. I am sure someone will chime in with the name of a clear product.
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05-15-2020, 08:33 AM #3
4200 works well.
1973 Viper - sold
1978 Viking - sold
1995 XB02
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05-15-2020, 03:16 PM #4
IMHO 4200 , 5200 is forever !!!!
why ask me ?
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05-16-2020, 11:55 AM #55000 RPM
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Yep, 5200 has been called gel coat remover
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05-18-2020, 05:58 PM #66000 RPM
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put a small circle around each hole on hull, and on bolt , avoid threads. if you go around whole plate, you can trap water between the two, not good.
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TEXAS20225 liked this post
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05-30-2020, 08:53 AM #7
Use sikaflex 291... mounted and repower hundreds of engines without a single issue.
15.5 cobra 175 hp merc - sold
18 tahiti tiger O/B 200 hp merc - sold
19 STV euro - 2.5 merc DRAG
Seebold F1 tunnel - 2.0 F1/champ
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