ARDEX 7+8 - Super flexible adhesive...

ARDEX 7+8 - Super flexible adhesive for polyethylene film

Waterproof adhesive for laying polyethylene sheets type ARDEX SK100 W. Super-deformable and waterproofing adhesive for laying ceramic tiles, porcelain tiles, thin porcelain tiles. Indoor-outdoor waterproof cementitious membrane for use in swimming pools, bathrooms, terraces in conjunction with ARDEX SK TRICOM.

Interior and exterior, walls and floors. 


  • 10 kg set (Ardex 7 of 5kg + Ardex 8 of 5kg).
Packaging format
142059 + 142061
Tax excluded


Norma UNE EN 12002 / 12004    EC1 - Muy baja emisión   Marcado CE   

  • Indoor and outdoor use
  • Waterproofing adhesive for the installation of ARDEX SK100W type polyethylene sheets, ceramic, porcelain tiles, thin-bedded tiles.
  • Indoor-outdoor waterproofing cementitious membrane for use in swimming pools, bathrooms, terraces in conjunction with ARDEX SK TRICOM
  • Fast setting and drying
  • Solvent-free
  • Super-deformable adhesive for laying tiles, porcelain tiles, porcelain stoneware
  • Easy to apply
  • Certified according to EN 12004 and EN 12002

Field of application:

Indoors and outdoors, walls and floors. Waterproof adhesive for fixing ARDEX SK100 W sheeting.

Super-deformable and waterproofing adhesive for laying ceramic, porcelain and thin porcelain tiles.

Indoor-outdoor waterproof cementitious membrane for use in swimming pools, bathrooms, terraces in conjunction with ARDEX SK TRICOM.

Product description:

ARDEX 7+8 consists of a solvent-free acrylic dispersion, ARDEX 8, and a reactive powder based on cements, additives and special fillers. For application of the product, both components are mixed together.

Substrate preparation:

Substrates must be firm, hard, dry and free of dust and other separating agents.

The following substrates are suitable: asphalt screeds, cement screeds, mortar plasters, lime plasters, gypsum plasterboards, insulation boards, fibre boards and building boards.

Gypsum plaster and render must be made in a single layer at least 10 mm thick and must not be felted or polished.

The ingress of rising damp through walls must be taken into account and remedied by using negative pressure waterproofing mortars (HUMISTOP N..).

Porous and gypsum substrates must be dry and treated with ARDEX P51 primer, diluted with water at a ratio of 1:3.


For filling holes and small voids mix to trowelable consistency.

If ARDEX SK100 waterproofing membrane is to be installedthen mix to consistency for adhesive application.

Mixing ratios:

For trowel application:

5.0 kg ARDEX 7 Reactive Powder

3.5 kg ARDEX 8 acrylic dispersion

For adhesive application:

5.00 kg ARDEX 7 reactive powder

4.25-5.00kg ARDEX 8 acrylic dispersion

Instructions for use:

Only material that can be applied within the pot-life of the product which is 60 minutes should be mixed. If the product starts to harden, ARDEX 8 should not be added again.

ARDEX 7+8 should be applied by 3x3x3 mm notched trowel, roller or brush, if the surface is very rough, a 4x4x4mm trowel can be used.

The open time of the product 15-20 min should be taken into account when calculating the maximum area of ARDEX SK100 or thin-bed porcelain stoneware to be laid.

The tiles should be pressed firmly to ensure full contact and to avoid air pockets. When installing ARDEX SK 100 membranes, follow the installation instructions in the technical data sheet.

Overlaps of the sheets:

ARDEX 7+8 is applied with a 3x3x3 mm notched trowel, or roller or brush in the overlap area. The next sheet is placed on the fresh mortar bed both on the substrate and in the overlap area.

The joints between floors and walls are to be reinforced with ARDEX SK12 strips. Pipes and drains are to be reinforced with ARDEX SK-W and ARDEX SK-F reinforcements.

ARDEX 7+8 can be applied at temperatures between +5°C and +30°C. It should be noted that high temperatures shorten the open time and low temperatures lengthen the open time.

Note: The trowelable consistency is suitable for filling holes and voids.


ARDEX 7, reactive powder, contains cement. Irritating to eyes and skin. ARDEX 8 contains a mixture of 5-chloro-2-methyl-isothiazolinone and 2-methylisothiazolin-3-one (3:1). May cause allergic reactions. Causes skin irritation. May cause serious eye damage. Keep out of the reach of children. Avoid contact with eyes and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. In case of contact lens wearer, remove contact lenses and continue rinsing.

Wear suitable protective gloves. Wash contaminated skin with soap and water.

In its set state it is physiologically and ecologically harmless. Disposal of waste and empty containers must be in accordance with local/regional/national/international legislation. 

GISCODE ZP1 = product with low chromate cement content. 

GISCODE D1 = solvent free (acrylic dispersion).

Mixing ratio:

As adhesive:

5.00 kg ARDEX 7 reactive powder

4.25-5.00 kg ARDEX 8 acrylic dispersion

Trowel application:

5,0 kg ARDEX 7 reactive powder

3.5 kg ARDEX 8 acrylic dispersion

Mortar density when fresh:

As an adhesive: Approx. 1.3 kg/L

Trowel applied: approx. 1.4 kg/L


Roller: Approx. 0.45 kg powder + approx. 0.45 kg dispersion = Approx. 0.9 kg/m2

3x3x3 mm notched trowel: Approx. 0.6 kg powder + approx. 0.4 kg dispersion = Approx. 1.0 kg finished product per m2

Toothed trowel 4x4x4 mm: approx. 0.8 kg powder + approx. 0.6 kg dispersion = approx. 1.4 kg finished product per m2

Pot-life (20°C): Approx. 60 Min.

Trafficability (20°C):

After approx. 2 hours.


ARDEX 8 Acrylic Dispersion: 5 kg net pail.

ARDEX 7 Reactive Powder: 5 kg net bag in units of 4 bags.


Approx. 12 months in dry places and in original closed container.

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Due to the local holiday of May 29 and 30, orders placed between 05/26

and 05/30 will be processed from Wednesday, May 31.