Mark42
Fleet Admiral
- Joined
- Oct 8, 2003
- Messages
- 9,334
I needed to epoxy some small pieces of wood to the underside of the deck. The usual thickeners - glass micro spheres and silica are packed away in the basement, so I thought about an article I read about using baking flour as a thickener. I have done this before with carpenters glue and a few other adhesives, but never with epoxy. So I gave it a try.
Took a couple of tablespoons of flour and mixed up 1 oz of epoxy. Mixed in the flour until it was thick as peanut butter. The flour makes a very smooth peanut butter, not as grainy as the silica I use. Then using the mix, the pieces were epoxied in place and clamps held them overnight. This morning I check on them. They are solid! I pushed and yanked hard and they did not break free.
So, if you are looking to make a paste epoxy, plain old baking flour will work as a thickener. I also noticed that instead of the usual 20 minute cure time, this batch took over 2 hours to cure.
Took a couple of tablespoons of flour and mixed up 1 oz of epoxy. Mixed in the flour until it was thick as peanut butter. The flour makes a very smooth peanut butter, not as grainy as the silica I use. Then using the mix, the pieces were epoxied in place and clamps held them overnight. This morning I check on them. They are solid! I pushed and yanked hard and they did not break free.
So, if you are looking to make a paste epoxy, plain old baking flour will work as a thickener. I also noticed that instead of the usual 20 minute cure time, this batch took over 2 hours to cure.