About 400,000 lineal feet of control joints crisscross the concrete floors in Toyota's new 4,000,000-square-foot auto assembly plant in Georgetown, Kentucky. The Toyota plant joints were filled with about 6,000 gallons of semi-rigid epoxy joint filler.

SURFACE PREPARATION: THE KEY TO SUCCESS

Surface preparation is one of the most important factors affecting filled joint performance. When a joint filler fails, it's often because of poor preparation. The sawed joint must be clean and dry before it's filled.

FILLING THE JOINTS

The filler, a two-part semi-rigid epoxy, was placed with a cart-mounted displacement pump. The pump draws epoxy components from two separate containers. They are metered and blended in a static mixing chamber, then discharged through the wand that lets the operator stand instead of bending over.