Superdurable polyesters swap much of the terephthalic acid in standard resins for isophthalic acid, which resists UV breakdown better. They typically keep gloss and color about two to three times longer than standard polyesters and are the usual choice to meet the AAMA 2604 five-year Florida exposure requirement on windows, storefronts and curtain wall. They cost more and can be a little less flexible.
Architect wants 2604 on the storefront, so quote the superdurable bronze, not the standard.
Also heard as
- super durable
- SD polyester
Related terms
Polyester powder
Powder based on polyester resin, the standard choice for outdoor parts because it holds color and gloss in sunlight.
AAMA 2604
The mid-tier North American architectural coating spec, requiring five years of Florida exposure with limited fade.
TGIC
Triglycidyl isocyanurate, the classic crosslinker that cures carboxyl polyesters into weather-resistant films.
Chalking
A powdery residue on a weathered finish where sunlight has broken down the resin at the surface.