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TEC PermaFlex 300 LHT Mortar – Large Format Tile & Stone Thin-Set, 50 lb.

Adhesives & Waterproofing

Everything that bonds and protects a tile installation: thinset mortars, mastic adhesives, waterproofing membranes, sealers, cleaners, and specialty glues — matched to your tile, substrate, and conditions from large-format porcelain to natural stone.


  • 408205  28384

    NAC Extreme Deck Waterproofing Kit

    T408205

    $458.27
    Added to Cart
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  • 407215  14881

    Epoxy Grout Haze Remover 24 oz Spray

    T407215

    $21.89
    Added to Cart
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  • 407245  62845

    Stone Plus Penetrating Stone Enhancer

    T407245

    $69.97
    Added to Cart
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  • 407231  17601

    PROSTRIP Sealer, Coating & Paint Remover

    T407231

    $32.99
    Added to Cart
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  • 407241  98361

    MP90 Solvent-Based Penetrating Sealer

    T407241

    $80.49
    Added to Cart
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  • 407239  82491

    Grout Proof Water-Based Grout Sealer

    T407239

    $24.19
    Added to Cart
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  • 407253  20047

    FILA Contractor's Choice Sealer 1 Gallon

    T407253

    $51.97
    Added to Cart
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  • 407103  43475

    Solvent-Based Stone Enhancer, Quart

    T407103

    $90.95
    Added to Cart
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  • 407169  16716

    Seal & Finish Low Sheen Sealer - 1 Gallon

    T407169

    $76.95
    Added to Cart
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  • 407175  79041

    High-Gloss Sealer - 1 Gallon

    T407175

    $85.95
    Added to Cart
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  • 407067  09854

    Grout Sealer 1 Gallon

    T407067

    $91.95
    Added to Cart
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  • 407125  82294

    Grout Colorant Pre-Treat Cleaner

    T407125

    $13.45
    Added to Cart
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  • 407165  95156

    Eff-Ex Efflorescence Remover 1 Gallon

    T407165

    $42.95
    Added to Cart
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  • 413051  05600

    Merkrete 703 Pro Set Polymer-Modified Tile Mortar, White, 50 lb

    T413051

    $10.69
    Added to Cart
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Shop Tile Adhesives, Mortars & Waterproofing

A tile job succeeds or fails on what's behind the tile. This collection covers that whole layer: modified and unmodified thinset mortars from TEC, Merkrete, SikaTile, and Schluter; ready-to-spread mastics; sheet and liquid waterproofing membranes; the sealers and cleaners that protect the finished surface; and the specialty adhesives that handle everything in between.

Build the Right Assembly

  • Thinset mortar — the professional bond for floors, walls, and wet areas, including LHT formulas for large-format tile.
  • Mastic — ready-to-use adhesive for backsplashes and dry walls.
  • Waterproofing — KERDI sheet systems and liquid membranes with banding, corners, and seals.
  • Sealers and cleaners — protect and maintain grout, stone, and tile.
  • Specialty glues — KERDI-FIX, board sealants, and urethane bonding.

Why Buy Setting Materials from Tile Outlets of America

Buy the mortar, membrane, and finish products as one matched system with the tile they support — at outlet prices from our Florida warehouses. With three Florida Flooring Supercenters in Fort Myers, Sarasota, and Tampa, you can see products in person and get advice from people who install tile every day.

Frequently Asked Questions

What do I actually need to install tile in a shower?
From the wall out: backer board or membrane-ready substrate, waterproofing (sheet or liquid) with banded seams, thinset mortar rated for wet areas, tile, grout, and color-matched caulk at the changes of plane. A sealer protects the finished grout and any stone.
Which thinset should I buy if I'm not sure?
A quality polymer-modified thinset covers most tile-over-most-substrate situations. Move to an LHT version for tile 15 inches and up, and to unmodified only where a membrane manufacturer requires it.
Do sealers and cleaners really matter?
Yes — sealing cement grout and natural stone is what keeps them from staining, and using pH-appropriate cleaners is what keeps sealers working. The maintenance products protect the labor you just paid for.

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