Sylgard 184 - not hardening

[hbibfeldt]

Has anyone had any trouble with Sylgard 184 hardening? It has been weeks, and this is still sticky. Heat does not help much.

H.

[bidaw]

Are you certain you got the mix right? That would be my first thought.

[hbibfeldt]

Sylgard mix is right

Mix is right, Big jar, small bottle, followed directions. However, small bottle was sealed with a piece of saran wrap under the lid. Is that unusual?

H.

[B17FE]

I've got one that hasn't cured yet either.
(Actually 2 panels ...1 -24 cell & 1 - 12 cell)
Tried putting the smaller panel in the oven ... no improvement.
About to try putting some curing (hardner) agent in a small spray
bottle and spray the back side of both panels to harden.
Material should be here tomorrow for trial.

[B17FE]

Well, it's starting to work.
Put 2 hardeners (+1/2 hardener I had left over) in a small spray bottle
from the dollar store.
Sprayed the backs of the combo unit and it appears to be stiffening up
for me now ...
It looks as if it will still take a longer period to fully cure than the other material I use.
(this sylgard was in a kit I bought just for the 3x6 cells ... won't use again ! )

The temp is aprox. 45* - 70* F out in the hanger where it's curing.