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Author Topic: P40 filler shelf life  (Read 527 times)

Capt Podge

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P40 filler shelf life
« on: August 04, 2020, 01:52:24 PM »

I've got about half a tin of P40 left, which I bought over 4 years ago. Will it still be usable or should I ditch it and buy a fresh tin?


Regards,
Ray.
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Tug Fanatic

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Re: P40 filler shelf life
« Reply #1 on: August 04, 2020, 02:07:11 PM »

I would suggest that there isn't a definitive answer to this as it will depend on a lot of factors.
Have you tried mixing a test sample, letting it go off & then trying to see how well it is attached?
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Capt Podge

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Re: P40 filler shelf life
« Reply #2 on: August 04, 2020, 02:25:13 PM »

Thanks tugs, I'll give it a go this evening and report back. I'm going to be filling holes in a grp hull where the holes were drilled out of alignment and don't want the filler failing when I re-drill the hull.


Regards,
Ray.
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BeeJay UK

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Re: P40 filler shelf life
« Reply #3 on: August 04, 2020, 03:01:47 PM »

I think I would laminate some mat on the inside of the hull and just fill the outside if I was doing it, but there are more than 2 ways to skin a cat.


As for the shelf life of P40, I can't help, I've never used it. However my current tin of P38 is about 6 years old and that still works fine. The hardener is newer though.
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Capt Podge

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Re: P40 filler shelf life
« Reply #4 on: August 04, 2020, 03:05:20 PM »

Thanks again tugs  :-))


Regards,
Ray.
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Capt Podge

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Re: P40 filler shelf life
« Reply #5 on: August 05, 2020, 02:34:28 PM »

Sorry, forgot to say thanks Beejay as well  :embarrassed: .
Also, didn't get the test piece done last night so I'll have a go tonight.


Regards,
Ray.
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BeeJay UK

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Re: P40 filler shelf life
« Reply #6 on: August 05, 2020, 02:53:34 PM »

No probs, I didn't take offence. Life's too short to fret too much.

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ballastanksian

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Re: P40 filler shelf life
« Reply #7 on: August 05, 2020, 10:49:47 PM »

Like with paint tins, if the lid is clean and well sealed then it should last a very good while as the styrene solvent will otherwise escape leaving an unworkable putty. The hardener does go crusty after a while making mixing more difficult, but I am not sure if unopened hardener goes off, I seemto recall having a virgin sachet that had gone off. Also, some sachets are not perfectly sealed around the neck and can go off through that.
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Pond weed is your enemy

Capt Podge

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Re: P40 filler shelf life
« Reply #8 on: August 05, 2020, 11:02:31 PM »

Hmmm, good points there Ian. I was a bit late getting back to the workshop this evening but, I DID manage to lay fibreglass on the inside of a hull which needs poor drill work filling. This will harden off overnight, then we'll see what happens ref the P40  :-))
(first time I've ever worked with fibreglass - we're never too old to learn)


Regards,
Ray.
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nemesis

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Re: P40 filler shelf life
« Reply #9 on: August 06, 2020, 07:01:10 PM »

Ray, if you get stuck come over and bring the boat with you. bill
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Capt Podge

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Re: P40 filler shelf life
« Reply #10 on: August 06, 2020, 07:41:11 PM »

Cheers Bill, I'll keep that in mind  :-))


Regards,
Ray.
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