Squeeze-out
Squeeze-out turns up in 2 fields: adhesives, geosynthetics. Here is what it means to the people in each one.
Squeeze-out in adhesives
The excess adhesive that oozes out along the joint edges at clamp-up, read as proof the joint is full.
A small, continuous line of squeeze-out shows the joint was fully filled. No squeeze-out suggests a starved joint, and too much wastes material and causes cleanup or cosmetic rejects. Squeeze-out is either tooled into a fillet, wiped off before cure or trimmed after. On anaerobics it stays liquid in air and must be wiped or activated.
"Nice even squeeze-out all round, that one's full. The next one's dry on the left, re-do it."
Squeeze-out in geosynthetics
Bead of molten polymer pressed out along the edge of a fusion seam by the welder's rollers.
A small, even squeeze-out shows the sheets were hot enough and pressed hard enough to fuse. Heavy squeeze-out signals too much heat or pressure and can thin the sheet beside the weld, while none at all hints at a cold weld. Inspectors use it as a quick visual check along every seam.
"Squeeze-out is fat and shiny on that stretch, she's running the wedge too hot."