Home » Tack Tack Written by Bryan Joslin on November 1, 2023 A small, temporary weld that holds pieces together before the final welding process. Related Articles: How to Prepare Plastic Bumpers for PaintBasic Steps For Repairing Rust Body PanelsHow to Paint Your Car With Single Stage PaintEastwood DIY Auto Painting FAQ’sTop 3 Tips for Using Eastwood Stitch Weld Magnets.