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Product Information Sheet
A850 AtcoWhite
Premium Elastomeric White

USES: A850 AtcoWhite is a relatively high solids, liquid-applied acrylic elastomer coating. It forms a seamless, self-flashing monolithic waterproof membrane that chemically bonds to the substrate or base coat. AtcoWhite fills and reinforces gaps, has outstanding strength, and long term flexibility.

DESCRIPTION: A850 AtcoWhite has a solar reflective surface with a durable acrylic finish that resists dirt. AtcoWhite also has an excellent coverage rate with low labor costs. In addition, AtcoWhite is resistant to chemical, biological, and ultraviolet (UV) degration.

DIRECTIONS: Clean away all loose gravel, dirt, vegetation, and debris from the application area. Seal any leaking penetrations and repair all membrane breaks with M300 RubrMastic. Prime the surface to be coated along with any uncoated masonry and new metal with M700 RubrGard. Use a roller or asphalt emulsion spray equipment, to apply both RubrGard and A850 AtcoWhite directly from their container without diluting. To apply over built-up roofs with AtcoWhite, thoroughly stir the AtcoWhite just prior to application. Then apply AtcoWhite at the rate of 3/4 gallons per 100 square feet. To install a waterproofing fabric with AtcoWhite, select either PolyWeb or GlasWeb. Then, generously brush 1 1/2 gallons per 100 square feet of AtcoWhite in a complete 3 foot wide strip as an adhesive beneath the first roll of fabric. Set the sheet into the AtcoWhite, making sure it unrolls straight and without any wrinkles. Carefully press the sheet into the AtcoWhite by lightly brushing the surface until complete adhesion and penetration is achieved. Do not step on the sheet until the AtcoWhite has set up. Continue installing each successive roll of fabric by overlapping the prior sheet 2" on the seams. For each additional layer of fabric, repeat the above process using 2 gallons per 100 square feet of AtcoWhite in a complete interply application. Center the rolls of each additional layer of fabric over the seams of the prior layer. Apply a final surface coating of AtcoWhite at the rate of 3 gallons per 100 square feet. To apply over new roofs with AtcoWhite, after preparatory cleaning, apply AtcoWhite at the rate of 3/4 gallons per 100 square feet to all horizontal, vertical joints, and seams. Before AtcoWhite dries, embed PolyWeb or GlasWeb (at least 6" wide) over center of seam. Work the sheet into the AtcoWhite so as to saturate the sheet. Apply the first coat of AtcoWhite at the rate of 1 1/2 gallons per 100 square feet. Roll or spray in one direction only, avoiding wide sweeps. Allow AtcoWhite to dry for 24 hours. After first coat has dried, apply a second coat of AtcoWhite at the rate of 1/2 gallons per 100 square feet in a right-angle direction to the first coat.

SPECIFICATIONS: A850 AtcoWhite exceeds the standards of the American Society for Testing and Materials ASTM D 6083 Type 3. Maximum VOC 30 grams per liter.

PACKAGING: A850 AtcoWhite is available in 1 gallon cans, 5 gallon pails, and 55 gallon drums.

TECHNICAL INFORMATION:
Approximate Pounds Per Gallon 11.5
Minimum Percent Nonvolatile Weight 65
Approximate Hours Set Up Time to the Touch 4
Percent Elongation is Greater Than 500
Tensile Strength is Greater Than 250psi
Optimum Application Temperature Range in deg. F 60 to 90
Application Consistency Brush or Spray

RECOMMENDED APPLICATION RATE PER 100 SQUARE FEET:

N/A

A850 MSDS >

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