Well I finally had the opportunity to use some of PolymerProducts epoxy tooling dough. It’s a two-part resin/hardener system with a 1:1 mix ratio. You need a scale to weigh out each part, then once they weigh equal…grab it in your gloved hands and begin kneeding the two parts together. Both parts are white colored, just slightly different shade of white… so mix thouroughly until it is one consistent shade of white ( i mixed mine in my hands for about 20 minutes. The pot life is 2 hours. I’m glad i had thick, tight fitting rubber gloves on because one tear in a glove your hands will feel the chemical burn. I was careful to make sure it didn’t get anywhere but on my hands, the plug, and the cup used for weighing. The mixed dough takes 24hrs to cure rock hard. You do have two hours with which to work it onto the plug surface.
If you do use this spread out some paper or plastic sheeting on a table or bench where your mixing. Little bits will fall from your hands.
I mainly bought this product to test it and see how it does, how hard or easy it is to work with. I’d say on scale of 1 to 10 (1 being the easiest) i’d give this product a rating of 5 for ease of use.
I wished i had more time to level out the dough on the plug surface, but it was late at night and i was feeling the effects of a 10 hour work day. Try it when you’re not tired or feeling lazy because it does require patience when working it.
My finished dough surface is very lumpy. I bet a makita grinder with a 4" sanding wheel would level it out the cured dough if i had the time and energy.
I spread the dough about 1/4" thick. You can press your finger through the dough to see what kind of thickness you have…or use a plastic ruler. This stuff is REALLY sticky, but once it is on the plug it stays put, don’t lay down one big lump on one spot of your plug, instead apply small “patties” of the dough to the surface. Also a word of caution… Make good and sure your surface coat is cured before you use this stuff. I also took another forum users advice and layed down two layers of f/g over my surface coat, let it cure 6 hours before i applied the dough.