Super Silicone Seal is easy and fast to fix leaks on rusted metal roofs, ducts, EPDM rubber roofs, and skylights #diy #airconditioner

17 Steps for repairing rusted metal on roofs and air‑conditioning ducts using Super Silicone Seal:

1. Prepare and clean the area: Remove all rust, old caulk, tar, paint, and other coatings. Start with a flat bar or hammer claw to pry off large chunks, then use an angle grinder with a wire brush or 120‑grit sandpaper to strip away remaining silicone, asphalt, and paint until the metal is clean and slightly rough
2. Wear gloves and eye protection.
3. Wipe the surface: After grinding, wipe the area with a rag soaked in lacquer thinner to remove tar, silicone residue, or oils that could prevent adhesion
4. Let the surface dry completely.
5. Mask off the repair zone: For a neat finish, apply painter’s tape roughly 2½ inches on either side of the crack, seam, or hole
6. Replace any rusted screws with new pan‑head screws before sealing to minimize movement
7. First coat: Use a paintbrush to apply a generous coat of Super Silicone Seal over the cleaned area, extending at least 2 inches beyond the damage
8. On cylindrical surfaces like ducts, cut small tabs into the polyester fleece so it can wrap neatly
9. Embed fleece: Immediately press a strip of polyester fleece into the wet sealant. Work out all air bubbles and wrinkles so the fabric sits flat and fully contacts the sealant
10. The fleece reinforces the repair and spans seams and pinholes.
11. Second coat: Apply a second coat of Super Silicone Seal over the fleece, saturating it thoroughly and making sure no fibers are exposed
12. For ducts or pipes, wrap the fleece around the entire circumference and coat it thoroughly
13. Finishing and cure time: Remove the painter’s tape while the sealant is still wet for clean edges
14. The sealant skins over in about 30 minutes and can withstand rain after roughly one hour, but it needs about 24 hours to cure fully
15. During this period, avoid walking on or disturbing the repair.
16. Optional topcoat and clean‑up: A protective topcoat can be applied after 4–12 hours if additional UV protection or colour matching is desired
17. Wipe away any drips with a clean rag and discard used brushes. Remember to wear gloves, use disposable brushes, and keep safety glasses on throughout the process
Chapters:
0:00 – AC Duct rusted with holes
0:15 – Preparing the surface
0:34 – Pouring Super Silicone Sealant
1:18 – Results after 5 years