Reply
 
Thread Tools Search this Thread
 
Old 10 March 2016, 02:26   #1
Member
 
Fstarocka's Avatar
 
Country: South Africa
Town: Cape Town
Length: 4m +
Engine: Mariner 60 3cyl 2str
Join Date: Jan 2016
Posts: 90
Dealing with micro leaks - Semi rigid

Hi there - So I think I finally have my boat ready for first test run (motor needs some small adjustments)..

The boat seems to stay pretty well inflated overnight - however I still notice some very light decompression..

I am looking for a liquid latex (or similar) glue that I can spray into tubes using my hand weed pressure bottle sprayer - it sprays a perfect even round fan and I can insert it thru the valve hole .. esp if i extend the rod - I can pretty mush get it all the way down the pontoons -

I cant fill the tubes and roll the boat - it weighs too much! any recommendations?
__________________

__________________
Fstarocka is offline   Reply With Quote
Old 10 March 2016, 03:10   #2
Member
 
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Mercury
Length: 3m +
Engine: Suzuki Outboard/25/4
MMSI: 235074042
Join Date: Oct 2011
Posts: 3,570
look on polymarine web site they have a latex you put inside the tubes you might be able to source the same in your neck of the woods.its like milk and sets hard and does work you will need to take a valve out and make up a hose that will spray in the areas you want, with small boats you just pour in and roll around on a good surface until coated i think it comes in 500ml bottles

cheers
__________________

__________________
jeffstevens763@g is offline   Reply With Quote
Old 10 March 2016, 03:12   #3
Member
 
Country: UK - England
Town: Sussex
Boat name: Bombard, Y-162
Make: Aerotec 380, Y-Class
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 2,691
Pump up the boat to full pressure and then using that same pressure sprayer fill it with very soapy water and spray on the *outside* (!) of the tubes (and valves), find the leaks and patch 'em up or fix the valves.
__________________
Max... is offline   Reply With Quote
Old 10 March 2016, 07:29   #4
Member
 
Phil M's Avatar
 
Country: UK - England
Town: Whitehaven
Boat name: Pegasus
Make: Zodiac Pro 530
Length: 5m +
Engine: 115hp Merc 4st
Join Date: Oct 2012
Posts: 337
Quote:
Originally Posted by Max... View Post
Pump up the boat to full pressure and then using that same pressure sprayer fill it with very soapy water and spray on the *outside* (!) of the tubes (and valves), find the leaks and patch 'em up or fix the valves.


Valves leak. Would be a shame to go to the trouble of spraying only to find it was the valve. Also, air temp changes (e.g. overnight) will reduce the pressure in the tubes by quite a bit. roll it back into the sun for a while and see if it firms up again .

Phil M
__________________
Phil M is offline   Reply With Quote
Old 10 March 2016, 12:07   #5
Member
 
Wightdiver's Avatar
 
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 434
Quote:
Originally Posted by Fstarocka View Post
Hi there - So I think I finally have my boat ready for first test run (motor needs some small adjustments)..

The boat seems to stay pretty well inflated overnight - however I still notice some very light decompression..

I am looking for a liquid latex (or similar) glue that I can spray into tubes using my hand weed pressure bottle sprayer - it sprays a perfect even round fan and I can insert it thru the valve hole .. esp if i extend the rod - I can pretty mush get it all the way down the pontoons -

I cant fill the tubes and roll the boat - it weighs too much! any recommendations?
I had a similar problem with an old RIB. First identify exactly where the leak is, in my case it was under the tape that seals the seam. Using a hill, blocks, the trailer jockey wheel or some strong friends (I am assuming it is on a trailer?) get the area directly under the leak flat. Buy some thin tubing, I used the stuff they use for fish tanks, it will fit over the nozzle of the Latex bottle.

Deflate the tube, you may need to also deflate the sections either side of the leaking section, so that you can push the leaking area down and touch the bottom of the inside of the tube (hope that makes sense!!). Then feed the tube in through the valve, takes a bit of fiddling but with patience you can direct it, to exactly below the leak, squeeze the latex in so that whilst pushing the tube together you can feel the pool of liquid. Remove the tubing, "massage" the tube so that the inside of the leaking area is doused in the latex then pump up as quickly as you can. When I did it the latex bubbled out of the leak.

Worked for me and I managed to get another 2 seasons out of the tubes before the inevitable re-tube. The first attempt slowed the leaks significantly, did it a second time which stopped the leaks totally.

Good luck

Andy
__________________
Wightdiver is offline   Reply With Quote
Old 10 March 2016, 12:10   #6
Member
 
Wightdiver's Avatar
 
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 434
"get the area directly under the leak flat"

I think the term I should have used here is level rather than flat.
__________________
Wightdiver is offline   Reply With Quote
Old 11 March 2016, 01:26   #7
Member
 
Fstarocka's Avatar
 
Country: South Africa
Town: Cape Town
Length: 4m +
Engine: Mariner 60 3cyl 2str
Join Date: Jan 2016
Posts: 90
Great info tx.. I did get some white milky stuff, and it helped a bit, checked valves, no leaks there.. The tubes stay firm all day.. But maybe the pvc was stretching creating a leaking symptom.. Pouring rain today, hoping to get it on the water for first test run .. Pulled carbs yesterday and cleaned them.. Bad timing I guess, had a whole week of perfect weather!

Interesting fish tank fix Andy, will look into it tx

Sent from my SM-G900M using Tapatalk
__________________
Fstarocka is offline   Reply With Quote
Old 11 March 2016, 02:43   #8
Member
 
Country: UK - England
Town: Retford
Boat name: Spy-sea-one
Make: Mercury
Length: 3m +
Engine: Suzuki Outboard/25/4
MMSI: 235074042
Join Date: Oct 2011
Posts: 3,570
Quote:
Originally Posted by Fstarocka View Post
Great info tx.. I did get some white milky stuff, and it helped a bit, checked valves, no leaks there.. The tubes stay firm all day.. But maybe the pvc was stretching creating a leaking symptom.. Pouring rain today, hoping to get it on the water for first test run .. Pulled carbs yesterday and cleaned them.. Bad timing I guess, had a whole week of perfect weather!

Interesting fish tank fix Andy, will look into it tx

Sent from my SM-G900M using Tapatalk
might be wrong on this but i seem to remember that you have to change the air in the tubes a couple of times to get a full cure on the milk. but as said make sure its not just the air cooling thats making it soft over night.if you have auto dumps check them too.

cheers
__________________
jeffstevens763@g is offline   Reply With Quote
Old 09 April 2016, 18:00   #9
Member
 
LucasHartong's Avatar
 
Country: Netherlands
Make: Achilles
Length: 3m +
Join Date: Mar 2016
Posts: 44
I'm thinking about doing a Sealflex latex job inside the tubes too. The advise is to turn the boat around every 5 minutes to give the latex the opportunity to spread around in the tubes, but: how many times/how long do you have to turn the boat around? How long does it take for the latex to harden out?
__________________
LucasHartong is offline   Reply With Quote
Old 11 April 2016, 01:37   #10
Member
 
Fstarocka's Avatar
 
Country: South Africa
Town: Cape Town
Length: 4m +
Engine: Mariner 60 3cyl 2str
Join Date: Jan 2016
Posts: 90
not sure, i think the previous product i used turned into a powdery mess.. id experiment with the product first before dumping it into your tubes..

The latex I got has a chemical smell.. so i guess it would dry rather quickly.. the bits around the cap were dry when i re-opened..

Fyi most of my leaks are main seams which I am actually re-gluing myself with a excellent 2 part epoxy thats given excellent results so far.. Old age and the glue does separate.

In principle id like to remove tubes myself and re-glue ALL the seams, wd be a fraction of the new tubes route, and yield great results..

Maybe this winter ill do that
__________________

__________________
Fstarocka is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 19:23.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.