How to Repair a Metal Roof Seam Leak

What to check first

• Find corrosion beneath old tar and caulking.
• Check that the panels are secured with fasteners appropriate to the roof.
• Press fleece into the panel profile instead of bridging over a hollow.

Prepare the joint before sealing it

1. Check movement and support

   Loose fasteners, separating joints, and deteriorated metal need attention before a liquid repair. Sealant is not a replacement for missing support or a failed attachment.

2. Identify the bonding surface

   Determine whether you are bonding to bare metal, a factory finish, or an older coating. Remove loose rust and failing material as directed; leave a sound, clean, fully dry surface.

3. Follow one compatible repair system

   For suitable Turbo Poly Seal seam repairs, embed the specified fleece in the wet base coat and saturate it with the top coat. Screw-head details may use sealant without fleece. Follow the current detail rather than mixing instructions from different products.

Watch the field examples

These archive demonstrations show individual projects. Use the current guidance above and Bergstrom’s published instructions if an older video shows a different product or method. Torch work shown in installation videos is professional work.

From the project archive