Length - 05:00 Learn how to select the proper type of mixing paddle and drill based on the material you are mixing. For small batches of epoxies or polyurethanes, use a small power drill. With cement-based mixes, use a larger, industrial ½-inch drill. Materials should be mixed at a variable speed no higher than 650 RPM. If the material is mixed any faster it can trap air in the mix and result in air bubbles in the mix. Harris also explains various other types of paddles to use depending upon the type of material being mixed, and demonstrates proper use of the paddles.
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