Compare exterior protection systems
Choose by substrate and objective, then check the specific system. These families overlap: “nano” describes a documented formulation characteristic, not a fourth universal protection system.
| System | Purpose | Suitable surfaces | Limits to check | Maintenance |
|---|---|---|---|---|
| Elastomeric coating | Renew the finish with a flexible film. | Metal roofs; other substrates only with documented approval. | Adhesion, required thickness, repairs and ponding-water compatibility. | Inspect the film, seams and fasteners; repair following system instructions. |
| Water-repellent treatment | Reduce wetting or water absorption on an approved substrate. | Exterior wood or mineral surfaces according to formulation; shingles require manufacturer acceptance. | Beading does not prove leak repair, UV protection, oil resistance or added roof life. | Check condition and follow the specified inspection and reapplication schedule. |
| Film-forming sealer | Create a surface layer; appearance and stain resistance depend on the product. | Concrete or pavers when the product is approved for the material and traffic. | Existing sealers, moisture, appearance and suitability for intended traffic. | Follow cleaning and recoating instructions; assess compatibility before adding a new layer. |
Read the detailed guides
Find a contractor for your project
Have your metal roof painted, or request a nanotechnology treatment for asphalt shingles, exterior wood or interlocking pavers. Describe your project so the team can check contractor availability in your region.
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