Backer Mix SD Color:White Pre-Casting - If using this

Pre-Casting - If using this mix to cast upside down in a mold

Tank Size: 2-gallon

Work great with all machine sizes

4-inch wide mouth opening for easy filling and cleaning

The polyurethane dust shroud is long-lasting and has an edge that can be flipped for edge work along vertical surfaces

Backer Mix SD Color:White Pre-Casting - If using thisSpartan Designs SD Series backer is a high fiber load GFRC mix. It is a single component blend that includes everything needed to make a very high strength backer Being a one component mix, we've taken the complicated weighing process of individual components out of the equation, so all you need to do is add water. Comes in Gray White