Synthetic forends and bedding compound??

[Dinny]

Hello everyone,
  I have been contemplating having my synthetic forends glass and pillar bedded. I have been told that there isn't an epoxy-type bedding compound that will reliably stick to the synthetic forends. My source of info is very reliable and competent, he has tried almost every type of conventional bedding compound there is and has roughed-up the surfaces and even tried treating the surface with a hardener. Once the forend heats up, things start pulling apart.

Anyone had any luck doing this themselves? Any suggestions?

This is what I want to have done.



Thanks, Dinny

[Smokin Joe]

RTV, unless you just have to have epoxy. I can't see why JB-Weld wouldn't stick with a proper rough-up.

[Dinny]

RTV, unless you just have to have epoxy. I can't see why JB-Weld wouldn't stick with a proper rough-up.

I'll ask about the JB Weld. Will RTV stabilize an aluminum pillar?

Thanks, Dinny

[necchi]

I'll ask about the JB Weld. Will RTV stabilize an aluminum pillar

 No, Unless flexible is what you want. It'll hold it in place, but it's made and designed to remain flexible. Torque or compression limits the flex and applies pressure under that circumstance, it can be desirable in that aspect,,
 RTV does have it's place.

[Smokin Joe]

You might shoot the inside with Krylon plastic paint first. It sticks to synthetics very well. Also, use a very good release agent if you go with JB; it's not called Weld for no reason.

[quickdtoo]

I'm working on bedding a synthetic forend, but I don't want to add any more weight than necessary, so I'm going to use pipe insulation as a filler first, so far all I've done is add the filler, going to shoot it as shown after I get an accurate load worked up, will experiment with different bedding positions, fill all the cavities, or just some, and see how it affects accuracy, and go from there. For now, I use a steel washer to float the barrel, that alone has provided good accuracy by itself, but I want to eliminate the need to place the front rest under the frame, and be able to support it anywhere without it affecting accuracy or POI.

Tim

[moorepower]

I have had good luck with Acraglas Gel. If you drill several holes in the ribs, the gel will run through the holes and lock it in place. I use a wire buffer and rough the heck out of it also. There is alot of oil in the synthetic stocks in general. I am using a washer for a 292 chevy side cover for my synthetic stock. It has a metal flat washer with rubber bonded on the other side, and it seems to work. I would think the best thing for a pillar would be a tee shaped pillar, so you could relieve material on the outside with a forester bit so the stock could not pull off.

[gcrank1]

Go down to your local auto body shop and ask them what they use for repairing the plastic car panels. Take the forestock and if the guy(s) a shooter too youve got it made in the shade.

[mechanic]

They make a special "super epoxy" for plastics that has a different composition and hardener than other epoxy's.  Devcon makes it, but that's all I remember.  I have used it with success on plastic engine parts that hold oil, as in a plastic oil pan.

Don't know if this helps, but worth a look.

Ben

[Dinny]

Thanks for the suggestions guys. I'm scouring the internet looking for different plastic epoxies. It's just a matter of time before I find the "one".

Thanks, Dinny

[nicholst55]

I have found that an important preparatory step when bedding synthetic stocks, especially injection molded ones, is to degrease the pertinent areas.  Remember, when these things are made, they're molded.  That means a mold release agent is most likely used, and it will be on the inside of the stock.  I use a spray cleaner like 409 or Simple Green to thoroughly wash the interior of the stock, then I rinse it with water and dry it out good.

Next, I abrade the areas that I want the epoxy to stick to - sometimes I drill a series of small holes through the inner skin of the stock.

These two steps don't guarantee success, but I've found that they certainly help.

[Bayou Stalker]

I've used this on two of mine with great success.

http://bluemagicusa.com/index.php/blue_magic/products/164/

[Dinny]

Keep the great ideas rolling in! I'm taking notes and have even contacted a few manufacturers for more specific info.


Thanks, Dinny

[moorepower]

It will get its best bond if it can run through the holes drilled on all the ribs in the plastic.

[Dinny]

It will get its best bond if it can run through the holes drilled on all the ribs in the plastic.

I'm tracking...hydraulic lock.

Thanks, Dinny