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Old 05 June 2010, 14:27   #1
Country: USA
Town: Sunnyvale
Boat name: Baby Back
Make: Caribe
Length: 4m +
Engine: Honda 50 outboard
Join Date: Jun 2010
Posts: 1
Adhesive for tube valve


One of the tube valves on my Caribe has been leaking, so I just purchased and fitted a replacement valve, but on screwing the new one in it didn't make a good seal to the hypalon and is leaking slightly from around the valve. So I removed it and took a good look and it seems the hole in the hypalon was cut slightly oval and so there is not as much sealing surface top and bottom as there is at the sides.

The original valve was screwed in with no adhesive, relying on pressure only to make the seal on the sandwiched hypalon, but I'm thinking that a combination of the fact that the hypalon is already compressed and the oval shape of the hole, will mean that I'm probably going to need something more than that to make a good airtight seal. However, to allow possible future removal of the valve I don't want to glue it permanently in place, so I can see three options:

1. Try Bostik 6554 1-part inflatable boat adhesive - hopefully it won't make such a strong bond as to be too permanent?
2. Try marine silicone sealant?
3. Glue a new collar of hypalon around the hole and try again for a pressure-only seal.

Any advice on those options?

I might try option 2 first as the simplest, and the easiest to undo if it doesn't work.

The valve are Caribe, but almost the same as the HR one shown here:


Ian P is offline   Reply With Quote
Old 05 June 2010, 15:39   #2
Country: Finland
Town: Helsinki
Boat name: SR 5.4
Make: Avon
Length: 4m +
Engine: Toh1 3,5 Yam 90/2S
Join Date: Oct 2009
Posts: 886

I would try with 1 mm gasket rubber, and make a suitable gasket from that, might work, anyway not much to loose. Have been using "petrol proof" rubber in some applications, that seams to be very resistant to aging also. If that fails, would try polyurethane based sealant
(sika 291 or sub.),

fun on a boat is inversely proportional to size...sort of anyway
C-NUMB is offline   Reply With Quote
Old 08 June 2010, 01:09   #3
Country: UK - Wales
Town: Southampton
Boat name: DynaMoHumm/ SRV/deja
Make: Avon8.4, 5.4 & 4.777
Length: 8m +
Engine: Cat3126 Yam 90 &70
MMSI: 42
Join Date: Dec 2003
Posts: 6,533
Bostik 2402 is youre glue

is where you get it from.

No3 is your option and preperation is important
Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
Pullin' me back to you - Deja Voodoo
Rogue Wave is offline   Reply With Quote

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