using hysol 9462 glued in servo 1st tube us came out brown and sec tube comes out white and yes im using long mixing tube. white stuff dryed and the 1st tube stuff is still soft seams like they filled both side of tube with the same stuff should i remove and clean up mounts or should i wait tell morning thanks scott

If in doubt, start over.

Chad

yank it out and clean up with acetone and start over....do it right or you'll regret it later.....pull the nozzle and mix it by hand like u do epoxy.....make sure u get equal amounts for white and tan on the mixing paper.....in my experience, u dont get an equal mix of the 2 on a new tube of Hysol.....takes a bit to settle down....

Clean it, do it again, forget the mixing tubes, I have like 4 of those laying around here for years, like fourlou said mix like your regular epoxy and apply it with a wood coffee stirier ( go get a Starbacks and get free mixing wood stiks ) or if you have to go inside a tight spot then pour some in a small Zip plastic bag ( small ) seal it, mix it cut a small piece on one of the corners and go for it [8D]

I think the tube was filled with the same on both sides or one side was not filled I used a new tube and it came out good as it should. lot number was LB9CAA7621 and used by 02/17/12 Thanks guys cleaned up all and reglued SHOULD BE GOOD

OK guys, once again.
There is a big quality issue with HYSOL 9462.
1 tube out of 2 gets air into one of the components ( usually on the white side ).
There are 2 possible fixes:

1) Mix the stuff out of the nozzle, making sure that you get the correct mixing ratio ( either 1:1 or 2:1, I am not in my workshop and cannot verify )

2) Put all your tubes in the oven at 50 to 70°c for one hour. Remove one tube after each other and "centrifugate" as fast as you can with your arm ( keeping the cartridge head towards you ). Get the cartridges to rest till they are cold with the heads up.
When you start to use the cartridge, first purge the air that will be at the top of the cartridge. When both components get out of the tube, install the mixing tip.

Note that a lot of guys believe that they have had mixing tip issues with Hysol. This is in fact an air problem. We have tested all types of mixing tips on our UAVs and never had any problem with them.
Bear in mind that this product is meant to be used with mixing tips ...

All a bit of a cheek really, you pay good money for an 'aerospace' grade epoxy and they cant even fill the tubes without air or as this case indicates with the correct component[>:]
In my experience the 9464 is far more consistent in terms of delivery and does the same job more economically....

marcs

Yes Marc, we dropped this product a while ago now.
Note that it is not aerospace grade at all. However, given the price of the product, it is absolutely not admissible...

Oli,

Great info.

If it is indeed not aerospace grade, is there an epoxy glue that is aerospace grade, that is applicable to us jet builders?

Tim

A while back I had a Henkel rep visit me to discuss the Hysol range of adhesives. From what he explained 9462 "Aeropoxy" is a product certified to be used in the aviation industry, and the license for this approval was held exclusively by the original American manufacturer, this product is now part of the Hysol range and the license maintains that the product can only be sourced form the original supplier, under the Hysol 'brand' who now have the sole selling rights. In essence this means the product is priced in a manner which the original product manufacturer dictates.

Other Hysol products are not part of the agreement and over the years they have developed their own versions like 9464 which have almost identical properties to 9462 "Aeropoxy".

The Henkel rep also said that although the 9462 product is very good, it is not really the best adhesive for our application as the materials and composites we use to build with are subject to flexing, and 9462 is not tolerant to this. Other products are better designed for this including Methacrylates.

marcs

Marc,

I would be interested in other comments about Methacrylates. I have used the Plexus MA-300 and MA-310, and they are very nice to work with, and impressive at bonding with composites. They do smell awful, but it does not last too long. Any experience with either of these adhesives especially compared to 9642?

Dave

Oli, did you ever use the VPOXY type Hysol? I had to drop that stuff because it almost sent me to the hospital from an alergic upper respiratory reaction.

No other epoxy has this affect on me. I always wonder what a factory using the stuff did if an employee had the same reaction.

Dave, I have started using methacrylates as they seem really suited to our hobby, the specs indicate that composites and such like are the most suitable materials to adhere to, that very little surface preparation is required so ideal for those places we cannot always get to to scuff up really well etc.

Attached are the specs for Devcon 531, Hysol 942 and Hysol 9464, Devcon 531 (530 very fast cure version) if sourced well are generally cheaper than Hysol 9462 and others.

I believe Stumax fans are assembled using this stuff.

As you say a really 'strange' smell, which seems not to cause irritation but just smells weird. One really important thing with methacrylates is they must not be moved during cure, this breaks the bond process and joints will be weak.

marcs

I stopped using Vpoxy as it was very hard to sand. Much harder than Aeropoxy. I only used it a couple of times, so I am wondering whether anyone else found this, or maybe I had a bad batch. It was quite rubbery (maybe the mix ratios were off due to air bubble??).

Where's the best place to get the Devcon? If Stu is watching, where do you source it in Australia?

Tim

You must not have been mixing it properly. it drys hard as a rock. very brittle.

Andy,

I used a long mixing tip. I will have to try mixing some by hand (2:1 ratio for Vpoxy from memory).

Tim