SpecFlow

SpecFlow

SpecFlow is a cement-based, non-shrinking, self-leveling floor underlayment designed for interior use. This single-component product produces a smooth subfloor that can be feather edged and is compatible with adhesives for carpet and tile. Just mix SpecFlow with water, pour or pump, and it will seek its own level to produce a smooth, flat hard surface.

  • Self-leveling, requiring no troweling
  • Can be featheredged without fear of chipping or spalling.
  • Produces a smooth, blemish-free surface, requiring no grinding or sanding
  • Is compatible with subsequent adhesives for carpet, tile and the like.
  • SpecFlow, when properly mixed, produces a flowable underlayment with a flow time of 20 minutes at 70 degrees F.

Coverage

  • approx. 24 sq.-ft. @ 1/4”

Packaging

  • 50 lb bag

Shelf Life

Shelf life of unopened bags stored in a dry facility is 12 months. Excessive temperature differential and/or high humidity can shorten the shelf life expectancy. Store in a cool, dry area away from direct sunlight.

Surface Preparation

  • Cleaning the Surface: Remove dirt, grease, oil, asphalt, paint, curing compounds, and loose materials.
    • Concrete surface: Should be profiled to a minimum CSP#3, with shot blasting preferred.
  • Priming: Apply SpecPrime at 100-150 sq. ft. per gallon using a brush or broom (not a roller) to ensure even coverage.
    • Porous surfaces: May require a second application. Allow SpecPrime to dry completely before applying SpecFlow.

Mixing and Application

  • Mixing SpecFlow:
    • Start with 4 quarts of water in a mixing container, then add one 50-pound bag of SpecFlow.
    • Use a blending paddle attached to a heavy-duty drill (650 rpm) and mix for 2 to 3 minutes until smooth and lump-free.
    • For extended applications, add 25 pounds of clean 3/8″ pea gravel per 50 pounds of SpecFlow during the last minute of mixing.
  • Application Instructions:
    • For interior floors: Pour SpecFlow over the primed substrate, spreading it with a long-handled spreader or pump it for larger areas. SpecFlow self-levels and requires no troweling.
    • It can be applied from a feather edge up to 2″ thick, and up to 5″ with pea gravel. Typically supports foot traffic within 2 to 4 hours, depending on conditions.

Finishing/Curing

  • Finishing: SpecFlow self-levels and requires no grinding or sanding for a smooth finish.
  • Curing: The product is self-curing under most conditions.
Set Time at 70°F
ASTM C266
Initial Set 50 min
Final Set 80 min
Compressive Strength
ASTM C109
1 day 3000 psi
7 days 4000 psi
28 days 5000 psi
Bond Strength
ASTM C882 modified
14 days w/ SpecPrime 1000 psi
Flexural Strength
ASTM C348
28 days 1150 psi
Yield/Density
Yield per bag 0.50 cu-ft (125 lbs/cu-ft)
Data Sheets

Download Technical Data Sheet

Download Safety Data Sheet

Download Specifications Guide

Download Technical Data Sheet (Spanish)

Play

Coverage

  • approx. 24 sq.-ft. @ 1/4”

Packaging

  • 50 lb bag

Shelf Life

Shelf life of unopened bags stored in a dry facility is 12 months. Excessive temperature differential and/or high humidity can shorten the shelf life expectancy. Store in a cool, dry area away from direct sunlight.

Surface Preparation

  • Cleaning the Surface: Remove dirt, grease, oil, asphalt, paint, curing compounds, and loose materials.
    • Concrete surface: Should be profiled to a minimum CSP#3, with shot blasting preferred.
  • Priming: Apply SpecPrime at 100-150 sq. ft. per gallon using a brush or broom (not a roller) to ensure even coverage.
    • Porous surfaces: May require a second application. Allow SpecPrime to dry completely before applying SpecFlow.

Mixing and Application

  • Mixing SpecFlow:
    • Start with 4 quarts of water in a mixing container, then add one 50-pound bag of SpecFlow.
    • Use a blending paddle attached to a heavy-duty drill (650 rpm) and mix for 2 to 3 minutes until smooth and lump-free.
    • For extended applications, add 25 pounds of clean 3/8″ pea gravel per 50 pounds of SpecFlow during the last minute of mixing.
  • Application Instructions:
    • For interior floors: Pour SpecFlow over the primed substrate, spreading it with a long-handled spreader or pump it for larger areas. SpecFlow self-levels and requires no troweling.
    • It can be applied from a feather edge up to 2″ thick, and up to 5″ with pea gravel. Typically supports foot traffic within 2 to 4 hours, depending on conditions.

Finishing/Curing

  • Finishing: SpecFlow self-levels and requires no grinding or sanding for a smooth finish.
  • Curing: The product is self-curing under most conditions.
Set Time at 70°F
ASTM C266
Initial Set 50 min
Final Set 80 min
Compressive Strength
ASTM C109
1 day 3000 psi
7 days 4000 psi
28 days 5000 psi
Bond Strength
ASTM C882 modified
14 days w/ SpecPrime 1000 psi
Flexural Strength
ASTM C348
28 days 1150 psi
Yield/Density
Yield per bag 0.50 cu-ft (125 lbs/cu-ft)
Data Sheets

Download Technical Data Sheet

Download Safety Data Sheet

Download Specifications Guide

Download Technical Data Sheet (Spanish)

Play