Re: [PSUBS-MAILIST] Epoxy cast question

["kocpnt tds.net" <kocpnt@tds.net>]

Hi Emile,

 

I hope I can help. The only type of epoxy to use in this situation is 100% solids epoxy as it does not contain solvents that later evaporate and help to cause shrinkage. I'm not sure if you are using the epoxy for primary seal or secondary, but in either case it will NOT bond well to smooth steel. To get good mechanical bond you should have at least a 2-3 mil profile as created by sandblasting or other mechanical means.

 

These products are pourable as we use them as floor finishes.

 

You may also consider JBWeld a paste type of substance that will work and comes in small tubes.

 

Good Luck,

 

Jim K

On Sat, May 9, 2009 at 8:56 AM, Emile van Essen <emile@airesearch.nl> wrote:

Hi,

 

I am about to cast epoxy in some self made el. Penetrators and a barrier in a thruster

 

First idea is to use normal aero modelling epoxy but when not okay I have a real problem to get it out the thruster.

 

Does someone have the knowledge or experience about kind of epoxy, adhesion to metals viscosity etc??

 

Thanks in advance!

 

Emile van Essen

Alkmaar, the Netherlands