Coatings for Exterior Cladding

By Linda Adamson, Stan Cook

Diversity in exterior cladding substrates is driving the need for architectural coatings that adhere to multiple substrates and combine the properties of high performance wood coatings with the properties needed for high performance on a variety of cementitious substrates, particularly stucco and fiber cement siding. A new 100% acrylic binder was developed to accommodate the increasingly broad range of exterior new build and repaint substrates and to be delivered with high solids to offer the paint formulator added flexibility without losing TiO₂ efficiency.

Compared to commercial high-solids binders, the new binder technology offers notable improvements in cracking and flaking resistance on wood, as well as outstanding alkali and efflorescence resistance on cementitious substrates, with an overall performance profile that is comparable to a leading commercial binder that offers high performance but low solids.