The 3M Extreme Sealing Tape 4412G+ is a thick, gray, 80 mil tape designed to create an immediate, watertight seal in difficult applications where traditional liquid sealants are messy or take too long to cure. It uses a strong acrylic adhesive that sticks instantly to metals and plastics, providing a durable and flexible barrier against the elements.
- Immediate sealing: Unlike liquid products, this tape seals instantly upon pressure, eliminating downtime associated with waiting for curing.
- Superior conformability: The flexible Thermoplastic Polyolefin (TPO) backing easily conforms over irregular surfaces like rivets, screws, and seams, ensuring a complete and reliable seal.
- Excellent durability for exterior use: The tough, abrasion-resistant backing and acrylic adhesive make it a great choice for long-term exterior sealing, even in harsh environments.
Who this is best for
This tape is ideal for maintenance and repair professionals in transportation (truck/trailer roof sealing), HVAC, and general industrial environments who need a fast, clean, and durable seal for seams, joints, and holes.


