What are the best joint fillers for expansion gaps in concrete outdoor seating?

When it comes to concrete outdoor seating, expansion gaps are essential to accommodate temperature changes and prevent cracking. Choosing the right joint filler ensures durability and longevity. Here are the best options:

1. Polyurethane Sealant: Highly flexible and weather-resistant, ideal for outdoor use.

2. Silicone-Based Sealant: Provides excellent adhesion and remains elastic in extreme temperatures.

3. Pre-Formed Foam Backer Rods: Used with sealants to fill larger gaps effectively.

4. Epoxy Fillers: Strong and rigid, suitable for high-traffic areas but less flexible.

5. Polysulfide Sealant: Resistant to water and UV rays, perfect for long-term outdoor exposure.

For optimal results, clean the gap thoroughly before application and follow manufacturer guidelines. Regular maintenance ensures the filler remains effective over time.