Integrated form for embedding a waterstop in a keyed concrete joint

An article of manufacture for forming a solid slab having both a keyed configuration and a separate embedded waterstop, said article not being embedded in the slab and comprising:

• said article being elongated and having a first edge, a second edge, a width, a first side and a second side;
• said article being monolithic and composed of thermoplastic;
• said article further comprising a protrusion running the length of said first side of said article;
• said protrusion having a generally planar upper surface and a generally planar lower surface;
• said article further comprising a trough running the length of said article with said trough penetrating through the protrusion and extending beyond the lower planar surface of said protrusion;
• said trough opening on the upper planar surface of said protrusion;
• said trough having essentially straight walls along the entire length of the article with only a narrowing of the tough at the opening on the upper planer surface of said protrusion;
• said trough adapted to receive the longitudinal edge of the separate waterstop within the protrusion;
• and
• said article having smooth surfaces on all sides of the article whereby the article can be removed from the slab after an initial formation of the slab.