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Fiberlock IAQ 3000 Acrylic Masonry Block Filler (5 GL)

Item #
5 Gallon Pail    Qty: 1
Mfr. Model #
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  • Coverage: 100-200 sq ft per gallon
  • Goes on white, dries white
  • Complies with the requirements for LEED® EQ Credit 4.2
  • Buying 5 or more: $153.39
  • Buying 10 or more: $144.83

Product Information

Fiberlock IAQ 3000 is a high quality interior and exterior block filler formulated to fill small imperfections and pinholes in masonry block and porous concrete before topcoating.


Brick and masonry block are often difficult surfaces to coat due to their porous nature. IAQ 3000 is ideal for prepping these overly porous surfaces to be top coated.


This product contains mineral type fillers and fine silica aggregates which fill voids in masonry surfaces. This 100% acrylic block filler is easy to apply, alkali resistant and provides a uniform surface capable of receiving all types of finish coats.


Fiberlock IAQ 3000 is not water sensitive after application and its flexibility and durability are the best available for a block filler, far superior to cementitious and PVA type formulations.


IAQ 3000 complies with the requirements for LEED® EQ Credit 4.2, low-emitting materials: paints and coatings.


This product is ideal for application to masonry block, concrete, brick and stone. IAQ 3000 is not water sensitive after application and its flexibility and durability are the best available for a block filler, far superior to cementations and PVA type formulations.



Fiberlock IAQ 3000 is supplied ready-to-use, but can be thinned sparingly with water for proper application consistency if necessary.


Maximum block filling qualities are achieved with use of a roller (3/8" in nap or longer).


Apply Fiberlock IAQ 3000 full bodied, vertically and cross hatched horizontally to remove all roller ridges and unevenness in the block filler.


Brushing should be done with a short stubby brush, working the material well into any pinholes, pores and voids.


Material should be applied in horizontal secions with the block mortar lines serving as a guide.


Spray application is not recommended because the silica content is abrasive to spray equipment.

Additional Info

Additional Info

Product Specifications:

  • Solids by Weight ± 2%: 65.8%
  • Solids by Volume ± 2%: 45.9%
  • Viscosity at 70°F: 112 Kreb Units
  • Specular Gloss: 2-4º @ 60º
  • Flash Point: Non-combustible
  • Shelf Life: 36 Months Min. (Original Sealed Containers)
  • Calculated VOC: 81 grams/liter


  • Smooth Surfaces: 200 ft2/gal
  • Porous Surfaces: 100-200 ft2/gal

Drying Times (@ 70 - 77°F , 50% R.H.):

  • To Touch: 4-8 hour
  • To Recoat: 24 hour


More Information
Brand Fiberlock
Category Specialty
Color White
Max Coverage Per Gallon 300
Application Fire/Smoke Damage, Mold Remediation, Odor Control, RRP/Lead Abatement
pH 8.5
Condition new
Manufacturer Model Number 8330
Safety Data Sheet (SDS)
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