Duralac??

[Richard10002]

I've gathered that Duralac is recommended when 2 different metals are attacehed... e.g. S/S rivets into and Al mast, or S/S bolts into Al stanchions.

I bought a tube, (which will probably last forever), and used it on some S/S bolts into the Al steering pedestal.

Having read the instructions, it seems that it goes tacky, then sets, which clearly creates the barrier between the metals.

The question is...... is there any danger of it setting so hard/tight that it can make it difficult to remove the bolts, or whatever, or does the seal break easily.

Hope this makes sense

Cheers

Richard

 

[tyce]

no it breaks easily

 

[Seastar]

Its used alot in aviation and I have never known of a case where the product has caused a problem with removal!
I would feel very comfortable in using the stuff.
Cheers
Neil

 

[Seapepper]

Have used it for years and joints are easy to dismantle. It is really good for eliminating corrosion.

 

[DaveS]

As you say, the standard sized tube (far too big IMHO for occasional use in maintenance jobs as opposed to major projects) does indeed last a long time. But I have found that after a year or two the contents seem to have separated out into a yellow paste that looks the same as the original contents, and a thin brown liquid. I have been using the former and trying to avoid the latter - not easy, but a scrap of kitchen towel soaks it up quite well. The finished result seems to be the same as with the original, unseparated, material, but does anyone know if this method of using old product is actually OK, or should I instead try to re-mix the separated parts, or should the tube be (very reluctantly) binned?

 

[Chris_Robb]

Its Zinc Chromate - keep it off your clothes, as it stains permenantly. I have an old Javelin jacket (shame you cannot get them any more) which got marked 10 years ago - tried everything to get rid of.

 

[VicS]

[ QUOTE ]
Its Zinc Chromate

[/ QUOTE ] Actually it is barium chromate.
Zinc chromate is slightly souble and would probably have washed out but I imagine barium chromate is virtually insoluble, but I have not checked. I can't help with any ideas about getting it off your jacket, sorry.