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StayFlex 590

A high performance, portland cement-based, large format tile (LFT) mortar designed for floor and wall installations and provides 20% more coverage than typical tile mortars.

  • Polymer-modified, just add water
  • 20% more coverage than typical tile setting mortars
  • Eliminates the need to back butter
  • Non-slump for large format tile and heavy stone
  • Extended open time
  • Good flexibility
  • Use for floors and walls
  • Better bond strength
  • ANSI A118.4, A118.11 and ISO 13007 C2TES1P1
For installation of:
  • Porcelain tile
  • Ceramic tile
  • Quarry tile
  • Non-moisture sensitive natural stone*
  • Cement tile and pavers
  • High bottom lugged tile
  • Glass tile
*All natural stone should be tested to be sure discoloration does not occur.

For installation over:
  • Properly cured and finished concrete
  • Cured portland cement mortar
  • Cement backer unit (CBU)
  • Exterior grade plywood (interior floors only) - 19” (48 cm) on center (OC) max
  • ProSpec B-6000 Waterproof / Crack Isolation Membrane
  • Gypsum plaster or gypsum board (dry areas: wall only)
  • Properly prepared cutback
  • Properly prepared tile
  • Properly prepared VCT tile
  • Cork underlayment
  • Countertops
Note: Difficult to bond substrates like existing vinyl tile or cutback adhesive require extra preparation. Consult ProSpec Technical Services.

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