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All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here! |
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07-16-2011, 03:09 PM | #1 |
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Join Date: Jul 2011
Location: Summerland key
Posts: 164
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Sealing holes in a speargun
Built my second gun and i'm on the last stage of finsihing it. I put the first coat of epoxy on to seal it but im afraid of water getting in the pin/screw holes. Is there any of way I can seal the holes to make sure no water gets in them and causes a delam? I used west systems with microfibers to laminate it but on the last gun that I built ended up cracking and I dont know if it was because of this.
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07-16-2011, 07:49 PM | #2 |
200mi from the ocean
Join Date: Dec 2010
Location: Lexington, VA
Posts: 254
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Re: Sealing holes in a speargun
Do you mean microbubbles? if so i would suggest using cab-o-sil. Microbubbles are shaped like little spheres which make them easy to sand but also very weak. Cab-0-sil is shaped like little jacks (you know the game with the ball) which make them bond very well but are slightly more difficult to sand. Also when you mix your epoxy putty make sure it is very dense try to get it to the thickness of peanut butter. And for your pin holes the best thing to do is fill them in with a thin epoxy saw dust mixture if you varnish your gun afterward you won't even notice them.
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07-16-2011, 08:51 PM | #3 |
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Location: Orange Beach, Alabama
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Re: Sealing holes in a speargun
I haven't done this personally, but I know some guys use silicone grease in screw holes as well as trigger pockets. You don't have to screw with oversizing that way, and if you need to remove the screw for some reason, you just put a little dab on the screw when you put it back in.
I think water intrusion is more likely to cause a black ring around the hole than a delam. What kind of wood was the gun you were referring to? |
07-17-2011, 07:24 AM | #4 | |
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Re: Sealing holes in a speargun
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07-17-2011, 10:25 AM | #5 |
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Re: Sealing holes in a speargun
Generally called "microballoons" & are used to lower weight & density of resin/epoxy; esp poured epoxy. In my experience used for poured end plugs in glass kayaks to seal without adding excessive weight. Little if any strength; most fillers are fiberous.
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07-17-2011, 09:00 PM | #6 | |
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Re: Sealing holes in a speargun
Quote:
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I pray for "good visability" http://www.makospearguns.com/ Tell um' what you want, what you really, really want! |
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07-17-2011, 10:05 PM | #7 | |
cdog
Join Date: May 2010
Location: Whitmore, CA NorCal
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Re: Sealing holes in a speargun
Quote:
My experience with this is mainly from boatbuilding and accurizing rifles, but it works. Brownell's makes a kit for glass bedding rifles called 'Acraglas' and it comes with a release agent, but not sure what's in it. |
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07-17-2011, 10:32 PM | #8 | |
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Re: Sealing holes in a speargun
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07-18-2011, 09:25 AM | #9 | |
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Re: Sealing holes in a speargun
Quote:
__________________
I pray for "good visability" http://www.makospearguns.com/ Tell um' what you want, what you really, really want! |
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07-18-2011, 09:29 AM | #10 | |
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Re: Sealing holes in a speargun
Quote:
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I pray for "good visability" http://www.makospearguns.com/ Tell um' what you want, what you really, really want! |
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07-18-2011, 06:19 PM | #11 |
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Re: Sealing holes in a speargun
I usually drill the pin holes a size up, fill with epoxy then redrill to the correct size.
And I would recommend keeping any type of grease AWAY from your gun until you have finished the final coat. It doesn't take much for "cats eyes" to start appearing in your finish. And it can be a real pain in the arse to get rid of them. Once you are happy with the finish, then it's ok to put a little grease where you want for some extra protection. |
07-18-2011, 06:25 PM | #12 | |
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Re: Sealing holes in a speargun
Quote:
__________________
I pray for "good visability" http://www.makospearguns.com/ Tell um' what you want, what you really, really want! |
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cracked, epoxy, help needed, seal, spear |
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