IAQ 6500

Mold Resistant* Coating – Black

Packaging Types:

5 Gallon
Where to Buy


IAQ 6500 is a black, mold resistant coating* that contains a fungistatic agent to resist mold growth* on the dry coating surface. IAQ 6500 is a durable, flexible, and permeable 100% acrylic water-based semi-gloss coating that can withstand the moist, humid conditions present in environments conducive to mold growth. IAQ 6500 is recommended for use on wood, plaster, wallboard, sheetrock, concrete, masonry block, primed metal and galvanized metal.

*Resistant to mold growth on the dry coating surface only


  • Tested by independent laboratories for mold resistance: ASTMG-21 and ASTM D-3273
  • Mold resistant*
  • Tintable formula
  • 100% acrylic

*Resistant to mold growth on the dry coating surface only

How to Use


Surfaces to be coated must be free of dust, mildew, mold, dirt, grease, loose paint, oil, glue size, calcimine, wax, soap and other surface contamination. Clean mold stained surfaces with Advanced Peroxide Cleaner, or use an EPA registered antimicrobial disinfectant cleaner such as IAQ 2000, IAQ 2500, ShockWave or ShockWave RTU. Patch irregularities with vinyl patching paste or an appropriate patching compound. IAQ 6500 is self-priming over bare sheetrock, composition board, ceiling tile and concrete.


Joint cement should be sanded smooth, but avoid abrading the paper.


Clean, then prime with IAQ 4000 rust inhibiting direct-to-metal primer.


Seal knots and stains with IAQ 5000 stain-blocking primer.


Apply one coat of IAQ 3000 block filler if a denser surface is desired.


Apply IAQ 6500 with brush, roller or airless spray equipment.

Brush: Synthetic, nylon or polyester bristle

Roller: Synthetic fiber 3/8” nap or longer

Spray Settings Pressure: 1500-3000 P.S.I. Tips: .015 to .023 tips


IAQ 6500 is supplied ready to use, but can be thinned sparingly with water (up to 1⁄2 pint water per gallon) for proper application consistency if necessary. Apply IAQ 6500 generously and uniformly by brush, roller, or airless spray. Apply one coat of IAQ 6500, and ensure that the  nished surface is properly sealed. To ensure that the  nished surface is properly sealed, two-coats may be required on some porous surfaces.


Smooth Surfaces- 400-450 sq. ft. per gallon

Porous Surfaces- 200-300 sq. ft. per gallon


@ 70°F 50% R.H

To Touch – 1 Hour

Recoat – 4 Hours


Clean tools and drippings with warm soapy water before Fiberlock IAQ 6500 dries.  Dispose of all waste according to all existing local, state and federal regulations.


Store in a dry place at temperatures between 40°F (4.5°C) and 90°F. (32°C). Stir thoroughly. Do not mix with any other coatings, solvents or colors in oil. The IAQ 6500 coating is resistant to mold only on the surface of the coating. No mold resistance claim is made other than to the coating itself. The use of this product does not protect users or others against food-borne or disease-causing bacteria, viruses, germs or other disease-causing organisms. Do not apply when air or surface temperature is below 50°F, or when drying conditions are poor or when surfaces are above a 15% moisture level content. Use adequate ventilation during application. When applying with a sprayer, wear a NIOSH approved respirator with any R, P, N or HE filter. For interior use only.

Safety & Technical Data Sheets

Product Documents