If you prefer to mix your own putties, pastes, or thickened epoxy concoctions, here a couple of guidelines:
The correct sequence for making your own recipes:
- Correctly measure and mix General Purpose resin/hardener.
- Add fibrous fillers like milled or chopped glass, or mini-fibers and mix well.
- Add bulking agents, like microspheres and mix well.
- Add thixotropic agent like fumed silica, or wood flour and mix well.
Please see The Epoxy Book Section VII C - Modifying Epoxy with Fillers for more information.