Armstrong Flooring S-464 Prime Strong™ Porous DATA SHEET



  • Do not install below 50oF (10oC) surface or air temperature.
  • Close container after each use.
  • Do not reuse container.
  • Do not flush primer down drains, sewers or waterways.
  • Carefully read and follow all cautions and warnings on product label.


S-466 Patch Strong SDS

For Use With

  • As a primer with all Armstrong Flooring underlayments
  • Can be used on sound, solid gypsum underlayments
  • Can be used on sound, porous interior concrete.

Product Information

TypeAcrylic dispersion
ColorLight Pink
RollerSoft bristle push broom, paintbrush or brush
CoverageDiluted 1:1:  400-600 sq. ft. per gallon
Diluted 1:3:  1000-1200 sq. ft. per gallon
depending on absorbency of substrate
Mixing RatioOn porous cement based substrates and standard absorbent porous concrete: Apply S-464 Prime Strong™ diluted 1:1 with water

On gypsum based substrates and highly absorbent porous concrete: Apply diluted 1:3 with water.  When dry (approx. 1-3 hours), apply a second coat diluted 1:1 with water
Units1 gallon
Drying TimeMin. 30 minutes on concrete. 
Review additional guidance on drying time appearing below.
Shelf Life 1 year if unopened
Freeze/Thaw StableNo, keep from freezing
VOC Content19.3 g/L; calculated 
Clean UpClean tools with water immediately after use
Bonds ToAll Armstrong® Flooring patches, underlayments.
Can be used on porous cement-based substrates and concrete. 
AdvantagesSuitable for use over porous surfaces
Ready for installation in as little as 30 minutes
Approved for use with all Armstrong Flooring patches and S-463 Level Strong
Concentrated – dilutes with water.
Size1 gallon pail
Item No.00464108
Item/Carton UPCN/A
12″L x 12″W x 12.5″H
Carton Weight36.7 lbs
Items per Carton4
Cartons per Pallet36


When used with recommended Armstrong Flooring products, the Strong System™ adds 10 years to the Armstrong Commercial Flooring Limited Warranty.

Substrate Preparation

All surfaces must be structurally sound, clean, and free of dirt, oil, grease, wax, plaster, curing compounds, old adhesive residues* and other foreign matter that may act as a bond breaker. Concrete floors must be tested for porosity in accordance with ASTM F-3191 and be free of excess moisture and/or alkali. Always refer to the Armstrong Flooring Guaranteed Installation System Manual, F-5061.

 *Some previously manufactured asphaltic “cutback” adhesives contain asbestos. For removal instructions, refer to the Resilient Floor Covering Institute’s publication Recommended Work Practices for Removal of Resilient Floor Coverings.

Application Instructions

Shake or stir S-464 Prime Strong™ prior to diluting. For application on cement based substrates and standard absorbent concrete; dilute 1:1 (1 part primer to 1 part water, by volume).  Apply evenly to substrate, using soft bristle push broom, paintbrush or brush. Brush off any puddles or excess primer. Allow to dry to a thin non-re-emulsifiable film prior to applying patches or floor covering.

For application on gypsum-based substrates and highly absorbent concrete; dilute 1:3 (1 part primer to 3 parts water, by volume).  Allow to dry thoroughly (1 to 3 hours).  Apply a second application diluted 1:1 (1 part primer to 1 part water, by volume).

Test the applied primer for dryness by sprinkling small amounts of water on various locations throughout the application area.  If the water remains clear after agitating, the primer is dry. 

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Updated on September 14, 2022

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