Under-Tile Systems • System 1 Section • Indoor Wet Areas

An under-tile waterproofing system that can be applied in all kinds of indoor wet areas.

System
AppearanceSystem 1 Section
Layers & Products8 layers
  1. 1

    Primer

    Required
    Main Product FOX UNIPRIMER FL555
    ~0.15 kg/m²

    Primer

    Alternative FOX PRIMERA® FL220
    ~0.19 kg/m²

    Option

  2. 2

    Floor Levelling

    Required
    Main Product FOX SSL® 80

    Floor Levelling

    Alternative FOX BETON RP25

    Option

  3. 3

    Wall Levelling

    Required
    Main Product FOX PROHAND® ELYAFLI

    Wall Levelling

    Alternative FOX PROHAND® İNCE

    Option

  4. 4

    Waterproofing

    Required
    Main Product FOX MULTISEAL® FS367
    ~4 kg/m²

    Waterproofing

    Alternative FOX WATERPROF® FS105
    ~1.68 kg/m²

    Option

    Main Product FOX MULTISEAL® FS477
    ~4 kg/m²

    Waterproofing

    Main Product FOX MULTISEAL® FS478
    ~4 kg/m²

    Waterproofing

  5. 5

    Waterproofing Tapes

    Required
    Main Product FOX TRIPLETAPE 120

    Waterproofing Tapes

  6. 6

    Tile Adhesive

    Required
    Main Product FOX CERAPLUS® FX112
    ~5 kg/m²

    Tile Adhesive

    ~5 kg/m²

    Option

    Alternative FOX POLYFLEX FX119
    ~5 kg/m²

    Option

    Main Product FOX CERAFLEX® FX114
    ~5 kg/m²

    Tile Adhesive

  7. 6A

    Ceramic Tiling

    Interlayer Step
    Ceramic, granite or natural stone tiling.
  8. 7

    Grout

    Required
    Main Product FOX FUGAMORTAR FX100

    Grout

    Alternative FOX AQUAFUGA FX150

    Option

  9. 8

    Corner Joint Silicone

    Required
    Main Product FOX SILICOPLUS SS310

    Corner Joint Silicone

System Description

An under-tile waterproofing system that can be applied in all kinds of indoor wet areas.

System Features

  • Extends the service life of the building elements while preserving the existing structure.
  • Provides a healthy, comfortable environment in wet areas.

Technical Specifications

PropertyValue
Area of UseIndoor Wet Areas
WaterproofingMULTISEAL FS367 / MULTISEAL FS477 / MULTISEAL FS478
Tile AdhesiveCERAPLUS FX112 (C2TES1) / CERAFLEX FX114 (C2TES1)
GroutFUGAMORTAR FX100 (CG2WA)
Number of Layers9
Surface Flatness≤ 7 mm under a 2 m straightedge (heavy load, facade, pool: ≤ 5 mm)
Surface AbsorbencyIf water is absorbed within 30–45 s the surface is highly absorbent; it is balanced with a suitable primer

System Detail

StageProduct / Application TypeConsumption
PrimerFOX UNIPRIMER FL5550.15 kg/m²
Floor LevellingFOX SSL® 80kg/m²
Wall LevellingFOX PROHAND® ELYAFLIkg/m²
WaterproofingFOX MULTISEAL® FS3674 kg/m²
WaterproofingFOX MULTISEAL® FS4774 kg/m²
WaterproofingFOX MULTISEAL® FS4784 kg/m²
Waterproofing TapesFOX TRIPLETAPE 120kg/m²
Tile AdhesiveFOX CERAPLUS® FX1125 kg/m²
Tile AdhesiveFOX CERAFLEX® FX1145 kg/m²
GroutFOX FUGAMORTAR FX100kg/m²
Corner Joint SiliconeFOX SILICOPLUS SS310kg/m²

Areas of Use

  • Bathrooms, showers and toilets
  • Kitchens and laundry rooms
  • All kinds of indoor wet areas

Application Steps

  1. 1

    Primer

    UNIPRIMER FL555 is applied.

  2. 2

    Floor Levelling

    SSL 80 is applied.

  3. 3

    Wall Levelling

    PROHAND ELYAFLI is applied.

  4. 4

    Waterproofing

    MULTISEAL FS367, MULTISEAL FS477, MULTISEAL FS478 are applied.

  5. 5

    Waterproofing Tapes

    TRIPLETAPE 120 is applied.

  6. 6

    Tile Adhesive

    CERAPLUS FX112, CERAFLEX FX114 are applied.

  7. 7

    Tile Covering

    Ceramic, granite or natural stone covering.

  8. 8

    Grout

    FUGAMORTAR FX100 is applied.

  9. 9

    Corner Joint Silicone

    SILICOPLUS SS310 is applied.

How is the soundness of the surface checked?

The existing plaster or screed is checked at points and at different depths with a tool such as a hammer or a bush chisel, without damaging the surface. On painted surfaces, weak and blistered areas are scraped off; sanding and scoring improve the grip of the adhesive.

How is the absorbency of the surface determined?

The surface is lightly wetted. If the water is absorbed within 30–45 seconds, the surface is considered highly absorbent and is balanced with a suitable primer; on non-absorbent substrates a filled primer is used to improve adhesion.

Can it be applied over old ceramic tile or PVC covered surfaces?

Yes, once the grip of the covering on the surface has been tested with a hammer or spatula. Loose pieces are replaced, or removed and the void filled with a suitable repair mortar.

How long should fair-faced concrete surfaces be left to cure?

In facade applications, fair-faced concrete must be allowed to cure for at least 3 months; otherwise shrinkage and thermal movement pose a risk to the adhesion of the covering.

Critical

The surface tolerance must not exceed 7 mm under a 2 m straightedge, and 5 mm on heavily loaded floors, facades and pools. Deviations beyond these values are corrected with a suitable repair mortar or plaster.

Important

Highly absorbent surfaces such as gypsum based boards, cement-bonded particle board, timber based boards, fair-faced concrete and aerated concrete are dampened by sprinkling water with a brush and then primed.

Information

On painted surfaces, the soundness of the paint is checked with a 2×2 mm cross-cut test over a 10×10 cm area; if 80% of the squares do not come off, the paint is considered sound, otherwise it is removed mechanically.

Products used in the system

The Fox Bau products used in the layers of this system.

For your project

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