G4 Thoughts

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Ed
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Re: G4 Thoughts

Post by Ed » Mon May 07, 2012 11:39 pm

I think that would be OK.

I agree that G4 is best used as a primer or sealer directly onto wood and wouldn't use it by choice over anything else...

....but my experience is that you can use it to patch quite easily....which inevitably means that the G4 goes over the top of some varnish, around the edges and I havn't had any problem with it stripping, wrinkling or softening the varnish that it has covered.

So, my experience is that as long as what is underneath is relatively hardened, it will cover OK, without any problem.

But for normal use, I would certainly suggest you stick to using it as a primer.

cheers

eib
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Re: G4 Thoughts

Post by Mark Jones » Sat May 26, 2012 5:50 pm

Ok have asked the boss to order 10L of Bonda Marine wood sealer to do the gunwales and other bare wood bits, spars etc. Has anyone tried Bonda Marine 15 year white paint? have lots of white woodwork to do on the inside, aprox 21/2 foot high and 150 foot of it, there are other bits but this is the main section.

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Mark

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Ed
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Re: G4 Thoughts

Post by Ed » Sat May 26, 2012 11:14 pm

havn't used the 15 year white myself.....

but do know someone who has so will ask them how it is going after 5 or so years. :lol:

eib
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JB9
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Re: G4 Thoughts

Post by JB9 » Mon Jun 04, 2012 6:47 pm

Had a great sail in the Jollyboat today but the decks look awful. The G4 is peeling in places and various patches of dark and light areas after a year. Not sure where I am going to find the time to re do them before the Nationals.

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Re: G4 Thoughts

Post by billytwiglet » Wed Jun 06, 2012 2:31 pm

On wood, I cannot see any advantage in using G4.
Mixing chemistries is never a good idea, so my advice is use varnish over varnish. If you want a 'primer' use the one recomended by the varnish manufacturer; you can't go back to him and say 'it peeled off, guv' 'cause he will ask what you prepped it with.....answer; G4? game over.
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sand in between down to 240/320 or finer
Some of the gloss finishes do not need sanding between coats but I wouldn't do more than 2-3 coats between sanding in any case.
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Re: G4 Thoughts

Post by Mark Jones » Sun Jul 01, 2012 8:01 am

Well thats over 150 ft of 3"-9" by 2" gunwale hot gunned, sanded and now ready for the G4, forecast for today looks ok so could be a long day to get 3 coats on.

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Re: G4 Thoughts

Post by Mark Jones » Tue Jul 24, 2012 6:52 pm

Well thats over 150 ft of 3"-9" by 2" gunwale coated with 4 coats of G4 wood seal in one day (9:00 - 5:00) like to see anyone try that with varnish.

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Re: G4 Thoughts

Post by Stephen Hawkins » Tue Jul 24, 2012 9:44 pm

Good for you. I have certainly not had any issues with it. And I will be looking for a can soon - when I get around to my Merlin.
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Ed
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Re: G4 Thoughts

Post by Ed » Wed Jul 25, 2012 9:24 am

Well done Mark, I am planning on coming over and having a look shortly. I may scull (or even sail) up if the tides are right.

cheers

eib
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Re: G4 Thoughts

Post by Mark Jones » Wed Jul 25, 2012 7:44 pm

No problem Ed, give me a ring first as may be busy with the big train set!

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roger
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Re: G4 Thoughts

Post by roger » Wed Jul 25, 2012 7:51 pm

wow you boys in the deep west certainly know about boys and their toys.
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Re: G4 Thoughts

Post by Fantasia » Thu Jul 26, 2012 4:27 pm

What is G4? I mean does anyone know what it is made from?
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Re: G4 Thoughts

Post by Bill-Conner » Thu Jul 26, 2012 8:28 pm

"Product Description
G4 is a moisture cured polyurethane which forms a non-porous seal on wood, concrete, brick and porous stone. G4 uses the moisture in the air and substrate to cure and harden."

Anecdote suggests it sets rock hard. Some people on this site speak well of it.

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Re: G4 Thoughts

Post by Mark Jones » Fri Jul 27, 2012 7:22 am

One very good thing with G4 is that it remains very flexable when hard, ideal for a lot of older boats. I removed the excess from the pot I was using after 5 days and you could flex it like thin cellophane.

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Mark

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Re: G4 Thoughts

Post by kfz » Fri Jul 27, 2012 3:12 pm

On offer at capital gardens at the mo, for those interested.

Kev

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