March 27, 2021 3 min read

How to Repair and Waterproof a Metal Roof With Liquid Rubber

Metal roofs are known for their durability and strength, and, unfortunately, rusting. Rust can cause leaks, which then lead to water damage to the supporting structures. Preventing rust is one of the best reasons to waterproof your metal roof. A waterproof seal not only protects the roof from rust but also protects it from damage caused by wind. Storms may lead to lost fasteners, parts or pieces of the roof that can further compromise its integrity.

Coating the metal surface can also reduce heat, which can help you save on energy bills, as well as minimize the expansion and retraction of the metal due to high temperatures. One of the best reasons to waterproof your metal roof is simply because it improves its appearance, especially when applied to older metal roofs showing their age and in dire need of a makeover. Now it's easy to have a waterproof metal roof with solvent-free Liquid Rubber Waterproof Sealant.

What Causes a Metal Roof to Leak?

If you aren't sure if your metal roof is leaking, you might want to inspect it. Tell-tale signs to look for so you can prevent any further damage include:

  • Loose or missing fasteners
  • Panel damage
  • An open headwall or flashing
  • Missing trim
  • Missing pieces or parts
  • Loose gutters and downspouts
  • Gaps in seams
  • Rust damage and holes

Any of these issues can contribute to water damage to your metal roof and the underlying structures. One way to solve or prevent most of these issues is with "waterproof tape for the roof" Liquid Rubber Seam Tape used with Liquid Rubber Waterproof Sealant.

How to Repair a Leaking Roof

If you notice that your roof is leaking, or you want to protect it from rust and the elements, you don't need to hire a high-priced contractor who charges thousands to apply a protective coating. With Liquid Rubber Waterproof Sealant, you can protect, beautify and waterproof your metal roof yourself, with substantial savings. Here are the basic steps to waterproofing your metal roof:

  1. Tighten, add or replace all loose fasteners.
  2. Remove any loose debris and bristle off loose rust.
  3. Clean by power-washing large surfaces, and use acetone on smaller surfaces.
  4. Allow the roof to dry thoroughly after power-washing.
  5. Apply Liquid Rubber Seam Tape to any seams or cracks greater than 1/8th of an inch long.
  6. Use metal-safe caulking gel on smaller seams and cracks, smoothing the material after application.
  7. Apply Liquid Rubber Seam Tape around vents, flashing and protrusions.
  8. Paint Liquid Rubber Waterproof Sealant over seam tape around vents, flashing and protrusions to seal.
  9. Apply Liquid Rubber Waterproof Sealant on the entire roof with a brush, roller or sprayer.
  10. Allow the sealant to dry between coats.
  11. Apply a colored or reflective top coat, if desired.

If some areas of the roof have a significant amount of rust, apply Liquid Rubber Multi-Purpose Primer before applying Liquid Rubber Waterproof Sealant. If the roof is more heavily rusted, use Liquid Rubber Metal Safe Sealant.

The best time of the year to waterproof your metal roof is at a time when you can avoid hot, direct sunlight while temperatures remain above 5C/40F. You also want to make sure to avoid starting your project if there's a forecast for precipitation. For areas prone to dew in the morning, application early in the day works best to allow time for drying between coats and for the final coat to dry before the next morning.

Waterproofing Metal Roof Case Study

In one case study, a homeowner in North Carolina had been unsuccessful in his attempts to seal his metal roof to stop leaks and prevent damage to his home. Replacing the roof entirely would have been very costly. First, he removed loose rust and debris and power-washed the surface to prepare it for sealing. After he applied Liquid Rubber Seam Tape to bridge the joints, seams, chimneys, flashing and other areas that had gaps, he applied three heavy coats of Dark Grey Waterproof Sealant. The leaks have stopped and his roof looks great.

Buy Liquid Rubber Waterproof Sealant Today

Liquid Rubber Waterproof Sealant will help you save money, not only by waterproofing your metal roof for less but also by protecting it from rust and damage from the elements. Your older roof will receive a much-needed facelift, which will beautify your home and add to its value. Liquid Rubber Waterproof Sealant is solvent-free, non-toxic, water-based and safe for use around pets and family members. Find out how Liquid Rubber Waterproof Sealant can help you repair and waterproof your metal roof. Shop now and join the loyalty program.


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