Surecrete GFRC XS Backer Bag Mix

A Glass Fiber Reinforced Concrete blend to reinforce cast concrete pieces. Can be colored with the standard and XS color additives.

Modifier Sold Separately


SureCrete’s XS Backer is a dual component cement based bag mix that is unmatched in fiber loading. It is not a “stand alone” mix, but is designed to be used in conjunction with XS Face or XS Precast. XS Backer greatly reduces the materials and labor required to construct traditional precast concrete. Reinforcement steel is eliminated, thinner precast pieces are routine, quicker production times are accomplished, and no “B” mold is required. A stronger, denser and more flexible cementitious composite is created by combining cutting-edge technology with modern fiber advancements. With a wide range of coloring and texture selections along with the manipulation of water demand and placement, design considerations are nearly limitless. XS Backer when used in conjunction with XS Face or XS Precast produces concrete countertops, fireplace mantles and facades, shower surrounds, wall panels, furniture and many other architectural elements. XS Backer is the perfect medium for residential, commercial, and industrial applications.

XS Backer was designed to help alleviate the typical constraints of precast concrete – thick and heavy pieces that can’t span long distances without some type of structural reinforcement such as steel rebar. Using the “reduction method” we’ve detailed in our in-person training class events throughout the country and in our instructional how-to videos, we’ve enabled you – the contractor or homeowner looking to craft a new architectural or precast concrete piece – to make casted concrete at a fraction of the typical thickness and weight of normal concrete as well as allow you to create much longer and wider peices, all without the use of additional structural support.

Additional information


50 lb bag


1 – 50 lb (22.7 kg) bag of XS Backer = approx. 9.8 ft² @ ½” (0.9 m² @ 12.7 mm) 7.2 ft² @ ¾” (0.64 m² @ 19 mm) OR 0.43 ft³ (0.01 m³)

Mixing Ratio

1 gal (3.8 L) XS Precast Modifier to 1 – 50 lb (22.7 kg) bag of XS Backer+ up to 40 oz. (1.1 L) water