Delivery Method for epoxy to hairline crack in stock...

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20 December 2010, 23:57

NorthGaAire

Delivery Method for epoxy to hairline crack in stock...

Hey,

What is the best method for delivering epoxy to a hairline crack? I put a crack in the tab of wood (this is a laminate stock) right behind the bolt handle slot. The wood did not break off - it just cracked and from the inside (inletting side).

I have heard that one of the Brownells two-part epoxy can be applied with a syringe and needle.

Any advice would be appreciated.

21 December 2010, 00:12

Chief Engineer

I use West System epoxy w/syringe. Be sure to use slow hardener with whatever brand you use.
If you can open crack a little, that is a big help. Clean up with denatured alcohol.

21 December 2010, 01:29

D Humbarger

I use my air compressor set to about 15 Lbs psi to gently blow the epoxy deep into the crack.

Doug Humbarger
NRA Life member
Tonkin Gulf Yacht Club 72'73.
Yankee Station

Try to look unimportant. Your enemy might be low on ammo.

21 December 2010, 02:40

ron vella

I swear by liquid Acra-Glas for most repairs. However, if the crack is truly "hairline", Acra-Glas is not good for wicking into it, because it's too viscous. You are better off with the Cyano-Acrylate(a super crazy glue), of water-like consistency, made by Satellite City. Because it is of such a thin consistency it wicks right into the crack by capillary action. It's the best that I've found. I buy it at Lee Valley Tools.

21 December 2010, 02:53

ramrod340

quote:
I use my air compressor set to about 15 Lbs psi to gently blow the epoxy deep into the crack.

As usual just my $.02
Paul K

21 December 2010, 05:46

M Pursell

A method that works for me is to put a small amount of acraglas on top of the crack, then heat it with a hair dryer. The heat causes the epoxy to flow like water.

21 December 2010, 08:10

Recoil Rob

Heat does it for me also, I use a wood match from the top, get it close enough and it will run.

21 December 2010, 13:13

Stefan

If you can drill a small hole into the crack from the inletting side Then you fill the drilled hole with epoxy, apply a bit of heat and turn the drill and press epoxy into the crack with "hydraulic pressure". Works really well if you can drill the hole in line with the crack.

The compressed air-metod workes well to!

_____________________________________________

The bitter taste of poor quality stays in the mouth far longer than the sweet taste of the low price!

21 December 2010, 13:22

JBrown

quote:
Originally posted by Stefan:
If you can drill a small hole into the crack from the inletting side Then you fill the drilled hole with epoxy, apply a bit of heat and turn the drill and press epoxy into the crack with "hydraulic pressure". Works really well if you can drill the hole in line with the crack.

The compressed air-metod workes well to!

IIRC someone mentioned a similar method a while back.

Their method was to drill the hole and fill it with epoxy, then use a tight fitting dowel or punch as a piston to force the epoxy into the crack.

Jason

"You're not hard-core, unless you live hard-core."
_______________________

Hunting in Africa is an adventure. The number of variables involved preclude the possibility of a perfect hunt. Some problems will arise. How you decide to handle them will determine how much you enjoy your hunt.

Just tell yourself, "it's all part of the adventure." Remember, if Robert Ruark had gotten upset every time problems with Harry
Selby's flat bed truck delayed the safari, Horn of the Hunter would have read like an indictment of Selby. But Ruark rolled with the punches, poured some gin, and enjoyed the adventure.

-Jason Brown

26 December 2010, 22:10

DMB

quote:
Originally posted by D Humbarger:
I use my air compressor set to about 15 Lbs psi to gently blow the epoxy deep into the crack.

+1 on the compressed air driving the exoxy deep into the crack. I then use surgical tubing to pull the two parts together tight, so the crack is bearly visible after the epoxy cures.

27 December 2010, 01:10

D Humbarger

quote:
Thanks for the responses.

The 15psi of compressed air worked perfectly

Don't mention it. Glade it worked for you.

Doug Humbarger
NRA Life member
Tonkin Gulf Yacht Club 72'73.
Yankee Station

Try to look unimportant. Your enemy might be low on ammo.