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#1
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aluminum hull protection
I have an aluminum hull which I have sandblasted and would like to know the best approach to sealing the keel/hull seam for added protection against any pin hole leaks that might exist prior to primer. I've heard of many primers and would like to know which one works the best, zinc chromate which will eventually be phased (inorganic I believe) or organic or other primers like Dupont's Variprime. The methods of barrier coating seem overwhleming! I want to do it right before I proceed,.
My two cents in this scenario would be tar epoxy after the selected primer then finish up fairing the area. Honestly, I am new to this being my first boat and have time to get it right the first time. Anyone that would like to weigh in on this that has good credentials like Steve, is welcomed. John |
#2
posted to rec.boats.building
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aluminum hull protection
On Sat, 12 Sep 2009 17:52:03 +0100, EASI54
wrote: I have an aluminum hull which I have sandblasted and would like to know the best approach to sealing the keel/hull seam for added protection against any pin hole leaks that might exist prior to primer. I've heard of many primers and would like to know which one works the best, zinc chromate which will eventually be phased (inorganic I believe) or organic or other primers like Dupont's Variprime. The methods of barrier coating seem overwhleming! I want to do it right before I proceed,. My two cents in this scenario would be tar epoxy after the selected primer then finish up fairing the area. Honestly, I am new to this being my first boat and have time to get it right the first time. Anyone that would like to weigh in on this that has good credentials like Steve, is welcomed. John Normally some sort of etching primer is used as a first coat as aluminum corrodes almost immediately after being cleaned. However, two part paints frequently cannot be applied over etching primer. I would suggest that you contact a marine paint maker for suggestions for a paint schedule. By the way, what makes you believe that you have "pin hole leaks"? Usually leaks are patched or welded up before painting. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
#3
posted to rec.boats.building
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aluminum hull protection
EASI54 wrote:
/snip/ Anyone that would like to weigh in on this that has good credentials like Steve, is welcomed. John *~* That's the drawback of asking advice on newsgroups. You are never sure of the value of responses - the biggest poseurs will tell you they have background. So, there is no substitute for judgment and cross-checking. Brian W |
#4
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Quote:
You never can be too sure with a twenty year old hull and evidence of patch work with epoxy delamination in few areas. Just some reassurance. John |
#5
posted to rec.boats.building
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aluminum hull protection
EASI54 wrote:
I have an aluminum hull which I have sandblasted and would like to know the best approach to sealing the keel/hull seam for added protection against any pin hole leaks that might exist prior to primer. I've heard of many primers and would like to know which one works the best, zinc chromate which will eventually be phased (inorganic I believe) or organic or other primers like Dupont's Variprime. The methods of barrier coating seem overwhleming! I want to do it right before I proceed,. My two cents in this scenario would be tar epoxy after the selected primer then finish up fairing the area. Honestly, I am new to this being my first boat and have time to get it right the first time. Anyone that would like to weigh in on this that has good credentials like Steve, is welcomed. John An aluminum filled moisture cured urethane (MCU coatings) - several coats. Then an epoxy but NOT a coal tar epoxy. email me privately for more specifics - --- this is a non-commercial news group! paul oman progressive epoxy polymers, inc. www.epoxyproducts.com/marine.html see www.epoxyproducts.com/aluthane.html for more on MCU coatings. |
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