epoxy question

[JoeHarris]

Capillary action.

So did you guys experience capillary action on the channel walls off the poured on areas?

I have done a quick test to see what the epoxy is like.. viscosity wise its really ok on a hot day 25+ C like today.

A gust of wind made ripples in the surface @ 45 min.

@ 4 hours .. the fluid will still flow and close gaps when disturbed.

For my quick test i de-greased some flat metal and worked it partially with the angle grinder to get scaling of... I want to know difference in strenght...
I made some wobbly channel using adhesive glue/kit..

Now on all edges there is capillary action visible... about 5 to 8 mm wide.. in corners it is more.
so a square of 40mm X 40mm gives about 25x25 mm usable flat surface.

Any opinions?



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In a word yes! You can file it down but better to make it wider than you need in the first place.

[driftspin]

In a word yes! You can file it down but better to make it wider than you need in the first place.

Ok guys...

Results of the test pour are:

- Surface is orange skin like.
so no mirror finish.

- Plexiglas like properties.

- Simple seperation from scaled steel surface.

- Simple seperation from grinded steel surface.

So ... I need to be carefull when removing unwanted material.


Did any of you prime the steel with a coating to prevent easy seperation?






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[Clive S]

- Simple seperation from scaled steel surface.
- Simple seperation from grinded steel surface.
So ... I need to be carefull when removing unwanted material.
Did any of you prime the steel with a coating to prevent easy seperation?

Did you make sure that the surfaces were clean and free of any oil deposits. I have used the West system with no issues and the epoxy bonds well to the steel.

[JoeHarris]

Did you make sure that the surfaces were clean and free of any oil deposits. I have used the West system with no issues and the epoxy bonds well to the steel.

I also used West System, ground back the surface a little and it was fine. Make sure you have the ratio correct and mix mix mix!

[driftspin]

Did you make sure that the surfaces were clean and free of any oil deposits. I have used the West system with no issues and the epoxy bonds well to the steel.

well made sure... degreased with brake cleaner.. wipedown and brake cleaner 2 times before grinding...

maybe use paint thinner or amonia or something else...



the test was done with 20gr resin + 8 gr hardner.... bigger volume will give me better resolution (1gr precision scale )

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[JoeHarris]

well made sure... degreased with brake cleaner.. wipedown and brake cleaner 2 times before grinding...

maybe use paint thinner or amonia or something else...



the test was done with 20gr resin + 8 gr hardner.... bigger volume will give me better resolution (1gr precision scale )

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To be honest I never tried it with such small quants just went straight for the big pour! But it worked fine.
http://www.mycncuk.com/threads/4513-...9752#post79752