The Best Products to Seal a Flat Roof

The Best Products to Seal a Flat Roof

Sealing a flat roof is crucial for maintaining its integrity and extending its lifespan. With various products available, it’s essential to choose the right one based on your specific needs. Here’s a guide to some of the best options for sealing flat roofs, drawing insights from Nationwide Coatings.

1. Liquid Rubber Coatings

• Description: Liquid rubber is a polymer resin that is a versatile and durable option that forms a seamless membrane.
• Benefits:
• Excellent waterproofing properties.
• Flexibility to withstand temperature changes.
• Good UV resistance, preventing degradation from sunlight.
• Disadvantages:
• Most are made with plasticizers that have a limited life. Coatings will become brittle and fail after elongation has been diminished.

2. Elastomeric Acrylic Coatings such as PERMAKOTE PLUS® Flat Roof Coating

• Description: Water-based elastomeric acrylic coatings are easy to apply and environmentally friendly.
• Benefits:
• Good reflectivity, which helps reduce cooling costs.
• Quick drying time.
• Can be applied over existing roofing materials.
• Very durable and long life span.
• Disadvantages:
• Do not hold up good to ponding water.

3. Polyurethane Coatings

• Description: These coatings provide a robust and durable finish, ideal for high-traffic areas.
• Benefits:
• Superior adhesion and flexibility.
• Excellent resistance to chemicals and abrasion.
• Long-lasting protection against water and UV rays.
• Good ponding water protection.
• Disadvantages:
• Usually needs an acrylic top coat and needs to be recoated often.

4. Silicone Coatings such as PERMASIL PLUS™ Silicone Roof Coating

• Description: Silicone coatings are known for their high reflectivity and moisture resistance.
• Benefits:
• Excellent for ponding water situations.
• Long-lasting and easy to maintain.
• Environmentally friendly and low VOC.
• Disadvantages:
• Can only be recoated with silicone.

5. Modified Bitumen

• Description: This is a hybrid roofing system that combines asphalt with modifiers for enhanced performance.
• Benefits:
• Strong and durable, suitable for various weather conditions.
• Can be installed using heat or cold adhesive methods.
• Provides excellent waterproofing.
• Disadvantages:
• Seams can be prone to leaks if not sealed properly.
• Asphalt degrades with UV exposure.

Choosing the right product to seal a flat roof depends on factors like climate, roof condition, and budget. Liquid rubber, acrylic, polyurethane, silicone, and modified bitumen are all excellent choices, each with unique benefits. For the best results, consider consulting with a professional to assess your specific needs and ensure proper application.

Nationwide Coatings has the right product for all your roofing needs. Inquire today for a free consultation and product assesment.