A weld whose purpose is to hold parts in proper alignment until the final welds are made. Commonly, filler rods are used to maintain alignment. Composed of foreign metals incompatible with the base metals to be welded, welding rods are non-uniform in size and thickness. Filler rods must be tack welded. Removal of the rods requires the use of mechanical grinding or torch cutting, costly and labor intensive methods. Additionally, rods can leave trace elements that can contaminate the weld area.

Made of EPA-approved Aquasol® Water Soluble Board, SoluShimTM allows for maximum flexibility, durability, and compatibility with any metal. Uniform in size and thickness, SoluShimTM guarantees that the required root gap is maintained throughout the entire welding fit-up. SoluShim™ will begin dissolving instantly with water, allowing the sticks to be easily pulled out of the welding fit up, leaving behind no harmful residue.