This article employs the word in a broader sense to indicate any cement-based construction material. The term "masonry" means different things to different people. As we have indicated, most of these materials - brick, stucco, fiber cement, cinder block - belong in the general category of masonry, so we will focus on the features that masonry requires. Special Performance Requirements of "New" Housing MaterialsĪny comparison of exterior binders used in coatings designed for the new wave of housing materials needs to first identify the properties these substrates demand from a finish, especially the attributes not required in coatings applied to wood. In support of the above assertion, the suppliers point to the popularity of styrene-acrylic and VeoVA paints in Europe and Asia, where masonry materials have been used much more extensively than wood on home exteriors for decades. The VeoVA products mentioned in this article are all VA/VeoVA copolymers. Consequently, most so-called VeoVA binders are actually copolymers of VeoVA and a less costly monomer, vinyl acetate (VA) in particular. For economic reasons, VeoVA homopolymers are virtually never used as paint binders. The term "vinyl versatate" (VeoVA) is often used broadly in the paint industry to describe any copolymer that includes VeoVA monomer. Strictly speaking, the term PVA applies only to polyvinyl acetate homopolymers. In the coatings industry, vinyl acrylic and polyvinyl acetate (PVA) are often used imprecisely as synonyms. Some providers are insisting that certain binder chemistries - i.e., vinyl acrylic, vinyl versatate (VeoVA), styrene-acrylic and vinyl acetate ethylene (VAE) - offer performance comparable to, or better than, acrylic binders on these substrates, customarily for less money. The uses specifically targeted by suppliers of alternative binders are non-wood materials - masonry, stucco, brick and metal - that are becoming increasingly popular in new home exteriors. Now, however, some are acknowledging the historical superiority of all-acrylic binders - and their continuing preeminence on bare wood surfaces - but are claiming that other chemistries have improved to the point where they represent legitimate performance alternatives in exterior applications, so long as they do not involve wood. Traditionally, manufacturers of alternative binders have routinely maintained that their products deliver the features of all-acrylic emulsions at a lower cost.
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