The same but differentMaciek Rupar
 | The same but different  Although low-VOC adhesives are marketed as direct replacements for VOC-solvent-based adhesives, there are significant differencesby Maciek Rupar
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In markets subject to volatile organic compound (VOC)
regulations, single-ply roof membrane manufacturers supply
alternative materials for solvent-based adhesives and primers.
Among the VOC regulation-compliant materials that have emerged,
low-VOC solvent-based and water-based adhesives are marketed as
direct replacements for VOC-solvent-based contact adhesives.
Although intended as direct replacements, these materials should
be considered apart from traditional solvent-based contact
adhesives. For one thing, work and handling practices for low-VOC
materials differ somewhat from those for traditional solvent-based
materials. And water-based materials present some challenges that
set them apart from both types of solvent-based materials.
Additionally, depending on specific products and manufacturers,
different recommendations for handling and use may apply for
products within the same general category.
Where are VOCs regulated?
The California Clean Air Act of 1988 established the framework
for the state's air quality management efforts, including
requirements for controlling ground-level ozone. To meet the
requirements, in 1989, the South Coast Air Quality Management
District, which is the air pollution control agency for Orange
County and urban portions of Los Angeles, Riverside and San
Bernardino counties, adopted Rule 1168. Rule 1168 limits VOC
content of adhesives and sealants, including single-ply roof
membrane adhesives and sealants. The VOC content limits introduced
in Rule 1168 later were included in similar regulations adopted by
a number of other...
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