GSL® ALL PURPOSE SEALER (APS) is recommended for use on all GSL® (family of products) installed systems to enhance the bond of underlayment to finished floor covering.

GSL ALL PURPOSE SEALER applied to surface of gypsum underlayment will eliminate any dusting creating a durable surface resistant to incidental moisture, resulting in an ideal surface for most floor coverings. One coat is all that is required, just mix at a 1 to 3 ratio with water and apply using approved methods.

Features and Benefits

  • Meets ASTM F2419
  • Zero VOC
  • Resists water & bleed through
  • Mildewcide protection
  • Simple 1 to 3 mix ratio
  • Outstanding flexural strength