PlatSil® Part H Hardener with Platsil Gel 25 A and B in a 1-1-1 ratio which gives a shore hardness of about 40. Platsil#10 is way too soft for the HW exhaust diaphragm. Markantique diver wrote: ↑Wed Jun 24, 2020 7:26 pmGreat job! I'm glad you kept after it instead of giving up.
I ran into problems with the one I made, and seems to be at least in part due to the #10 hardness of the silicone mix I used. It is way too soft to hold its position. Looks like I will need to find a way to thicken it or order some heavier stock.
What did you use to modify the hardness? I don't know much about this stuff since I didn't purchase it. It is some left-over from Jerry M's stash, and surprisingly cures properly. It's just too soft for this application, and it turned out way too soft for the Trieste diaphragm I was attempting.
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