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How effective is the BioShield™ optional mold and mildew resistant coating available on high humidity warranted ceiling products?

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How effective is the BioShield™ optional mold and mildew resistant coating available on high humidity warranted ceiling products?

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CertainTeed’s BioShield™ mold and mildew resistant coating has been evaluated for resistance to the growth of mold that might occur on its surface in a severe mold environment. Testing was conducted by an independent testing laboratory in accordance with ASTM D 3273, “Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber”. The ASTM D 3273 test method exposes test samples to a continuous inoculation of the surface with mold spores at conditions of 90 F (32 C) and 95 – 98% relative humidity for a 4-week (28-day) period. The test samples are then visually examined and evaluated for the growth of mold and mildew. The evaluation was performed in accordance with ASTM D 3274, “Standard Test Method for Evaluating Degree of Surface Disfigurement of Paint Films by Microbial (Fungal or Algal) Growth or Soil and Dirt Accumulation”. The BioShield™ treated acoustical ceiling products received an ASTM D 3274 rating of 10, indicating no v

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