SpecFlow 
Premium self-leveling underlayment
SpecFlow is a cement-based, self-leveling floor underlayment designed for interior applications. This high-quality, non-shrinking product ensures a smooth subfloor that is feather-edged compatible, preparing surfaces for carpet, tile adhesives, and other finishes. Simple to use, SpecFlow requires only mixing with water to achieve a smooth, flat, and hard surface.
- Self-Leveling Formula: Automatically levels itself, eliminating the need for troweling.
- Versatile Application: Can be applied from a featheredge up to 2” thick, and up to 5” with added pea gravel.
- Fast Setting: Accepts foot traffic within 2 to 4 hours, enabling quick project turnaround.
- High Bond Strength: Superior adhesion to the substrate, ensuring long-lasting durability.
- Compatible with Multiple Flooring Types: Works well with adhesives for carpet, tile, and other floor coverings.
- Pumpable for Large Jobs: Easily applied with a grout pump, perfect for large-scale projects.
- Smooth Finish: Produces a blemish-free surface, requiring no additional grinding or sanding.
- Feather Edging Capability: Can be featheredged without the risk of chipping or spalling.
Application
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.
Packaging
Available in 50 lb. bags, with coverage approximately 24 sq.-ft. at 1/4 inch thickness.
Shelf Life
SpecFlow offers a 12-month shelf life when stored properly in a cool, dry location.
Test Data
- Set Time: SpecFlow has an initial set time of 50 minutes and a final set time of 80 minutes at 70°F.
- Compressive Strength: It achieves 3000 psi in 1 day, with strength increasing to 5500 psi by 28 days.
- Bond Strength: After 14 days with SpecPrime, it exhibits a bond strength of 1000 psi.
- Flexural Strength: At 28 days, it achieves a flexural strength of 1150 psi.
- Yield/Density: Each bag yields .50 cubic feet, with a density of 125 pounds per cubic foot.
Documents
SpecFlow Specification