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SP Handi Pack - how handy?
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ColH View Drop Down
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Posts: 242 		Post Options Post Options   Quote ColH Quote  Post ReplyReply Direct Link To This Post Topic: SP Handi Pack - how handy?
    Posted: 27 Jan 08 at 5:55pm

I need to do a small amount of epoxying, and am then probably not going to use the materials for a while. I see SP's "Handi Pack" comes with pump dispensers, but do these last a fair time i.e. if I come back to them after 6 months are they going to be unusable - if so then I figure might as well use the tried-and-tested pot+stick method.

Any experiences with the pumps?



Edited by ColH
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tgruitt View Drop Down
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Posts: 2479 		Post Options Post Options   Quote tgruitt Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 6:06pm
Well you will still need to mix it in a pot with a stick if you use the handipack or not. Get 2 syringes and measure out the quantities with those, it's probably a cheaper way of doing it.
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ColH View Drop Down
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Posts: 242 		Post Options Post Options   Quote ColH Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 6:11pm

Originally posted by tgruitt

Well you will still need to mix it in a pot with a stick if you use the handipack or not. 

Good point . Just managed to find SP's website and some datasheets. They claim the pumps can be cleaned out with hot soapy water + solvent.
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tgruitt View Drop Down
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Posts: 2479 		Post Options Post Options   Quote tgruitt Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 6:13pm
Originally posted by ColH

Originally posted by tgruitt

Well you will still need to mix it in a pot with a stick if you use the handipack or not. 

Good point . Just managed to find SP's website and some datasheets. They claim the pumps can be cleaned out with hot soapy water + solvent.



Sounds like its ideal for that job then. You just need to make sure you dont get the resin and hardner mixed on the pumps themselves, because then they will never work again!
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Lukepiewalker View Drop Down
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Posts: 1341 		Post Options Post Options   Quote Lukepiewalker Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 6:20pm
I've had mine for a few years and it still works ok (possibly a bit over it's shelflife to be honest...)
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Posts: 2899 		Post Options Post Options   Quote alstorer Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 8:19pm
For non-aerospace use, two part epoxy has pretty damn good shelf life. The hardener is the part which does go a bit, though as long as you close the pot/tube/whatever properly carbonation will be minimised.

Pro tips: adding more than the stated hardener doesn't set it much quicker, but does result in a much worse properties- most especially, reduced water resistance due to the unreacted amine groups, but also immediate mechanical strength.

And always wear disposable gloves.
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Posts: 861 		Post Options Post Options   Quote HannahJ Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 8:32pm
We take the pumps out and put the original lids back on the bottles, then wrap the ends of the pumps in clingfilm, it works pretty well.
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Garry View Drop Down
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Posts: 536 		Post Options Post Options   Quote Garry Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 9:10pm
I just leave the pumps in and keep them in a cool dark place, never had a problem although you have to reprime the pumps before using them to measure.

Edited by Garry
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Lukepiewalker View Drop Down
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Posts: 1341 		Post Options Post Options   Quote Lukepiewalker Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 08 at 10:16pm
They do say in the instructions to stick a screw up the end of the pump.. My problem is I don't use that much epoxy..
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Posts: 57 		Post Options Post Options   Quote scottish_tornad Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jan 08 at 8:38am
 Had mine for about three years now . leave the pumps on and its still seems ok just used some last night on a RC glider im building stuff left in pot after mixing is rock solid this morning.
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