3M(TM) Scotch-Weld(TM) Instant Adhesive Gel CA50 Clear, 20 g Tube, 12 per case One-Part, High Strength, Surface Insensitive Gel Cyanoacrylate Adhesive. Use in Non-Sag Vertical Applications and Fill Gaps Up to .020 Inches. Very Slow Cure. Its gel consistency allows it to be used in many non-sag vertical applications, and to fill gaps up to .020 inches. Its very slow cure rate allows maximum time to reposition parts.