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Posted to uk.d-i-y
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Anyone experience of 2 part epoxy putty
newshound wrote:
On 9/6/2016 10:28 PM, wrote:
Essentially, it is almost like a regular tee but with an extra side
branch to connect a drain hose to it. The bit has broken off
completely. Rather than a vertical break in parallel with the main
body, it is at an angle so the result wont really need to bear any
weight (if you see what I mean).
When you put the mixed epoxy putty onto the plastic, is it supposed
to stick to it and therefore stay on or does this only happen once
cured?
thanks
Lee.
It might be helpful if you posted a picture via Dropbox or one of the
other similar services.
In my experience epoxy will stick to most things, and the "plumbers"
putty will stick to them even when wet. However, there are a few
plastics which are difficult.
If the epoxy doesn't stick when it is soft, it's unlikely to do so
when it sets (although you might be able to repair some things
effectively by encapsulating them).
Virtually nothing will stick to PTFE, polyethylene, polypropylene, or
silicone rubber, or many surfaces which have experienced silicone
polish. If this unit has been made in a mould, the surface may be
contaminated with mould release agents (often but not always silicones).
Some materials (perspex comes to mind) don't always take epoxy very
well, but car body filler might work very well because the uncured
material will tend to dissolve into the surface.
There are various formulations of epoxy putty, of which one is
Milliput. They are basically made from something like epoxy glue, but
with an inert filler to make them more putty-like, and to make them
easier to shape when cured. With a high epoxy content, they will be
stronger and stick better, but be more difficult to shape, and vice
versa. Conversely, low epoxy mixes will be easier to shape, but be
weaker and less sticky.
One product which seems to have a good reputation is JB Weld, which
contains powdered metal and is supposed to be good for high strength
repairs.
Yes, I experienced the horrors of a car vinyl interior which had
been silicone polish coated. When I finally managed to stick something
to the dash, I never ever managed to get the glue off the surface(15
years!) and every solvent I could find.
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