Many installers know how to heat weld vinyl proficiently, but struggle when it comes to linoleum. The reason it is such a struggle is that it is a different type of welding. With vinyl you have a thermo-fusion process; that is, a melting and fusion between the rod and the material. With linoleum the process is completely different. The linoleum and the rod is a bonding process, not a fusion process. The rod acts like a glue stick. With linoleum, the groove is deeper, the rod doesn’t stick immediately and the skiving has to be done while the rod is warm.
Following is the step-by-step process to follow in order to ensure that the heat-welding is done efficiently and correctly.
Photo 1:The seam must be cut slightly open and time must be taken for the adhesive to dry. Unlike vinyl adhesives that are pressure-sensitive and can be heat welded immediately, linoleum adhesives must be allowed to dry and take overnight to set up.
The first pass with the skive knife and the trim plate should be almost immediate. The difference is the linoleum rod permits this. If you tried this with a vinyl rod you would get severe concaving from the rod.