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HydroPhase® APS

Underlayment & Leveler Substrate Bonding 
Formulated Materials® APS self leveling concrete primer is a low VOC acrylic primer and sealer for improved performance of fire-rated underlayments and self-levelers by providing a solid bond to the substrate during installation.


Formulated Materials® APS self leveling concrete primer increases moisture and abrasion resistance. This self leveling primer also increases the durability of underlayments and levelers when applied to fully cured surfaces. APS is easy to use and is appropriate for use with both porous and non-porous substrates when applied as a primer.

  • Provides a strong, positive bond when pouring underlayments and levelers over wood, concrete, metal, gypsum, and most properly prepared substrates.
  • Improves surface hardness and reduces porosity and moisture absorption of cured underlayments and levelers.
  • Low VOC Formula is non-reactive and non-toxic.
  • Low-odor formula is tinted blue to provide visual indicator for proper application.
  • Approved for use with all Treadstone® and HydroPhase® underlayments and levelers.

Formulated Materials® APS in conjunction with an approved Treadstone® and HydroPhase underlayment or leveler, is recommended and approved in:

  • Multi-Family Construction
    • Apartments
    • Hotels
    • Condominiums
  • Residential and Single Family
  • Commercial Office Space
  • Renovation of old wood frame or concrete structures


5 gallon pails, 43.2lb

Data Sheets