I work in the autobody industry. This is a seam sealer tip that replicates factory seam sealer bead texture in the structural portions of a car. : r/functionalprint
Car Body Sealing Repair | Paint Shop Sealants | Sika Automotive
Tips for Duplicating OE Seams with Ease
Septone® Paint Seam Sealer, Grey - 900g | Supercheap Auto