Mixing GFRC Backer Mix
GFRC backer mix is typically the most challenging of all the GFRC mixes to blend. The high fiber content and low water amounts dramatically increase its chances for clumping. We’ve discovered that a double-paddle mixer like those from Collomix or Benner Nawman do an excellent job of thoroughly blending GFRC backer mix quickly and with the fewest amount of clumps. Remember GFRC backer mix should have the pliable consistency of clay which allows us to lay it up on vertically formed surface.