!FREE DELIVERY on Every Order (Most of Mainland UK) *

Mapei Keraflex Adhesive 20Kg – Pallet Deals and Bulk Buy – High Performance Polymer Modified Adhesive


Mapei Keraflex Tile Adhesive

High-performance cementitious adhesive with no vertical slip and extended open time for ceramic and stone tiles

  • Extended open time
  • High initial grab
  • Non slip
  • Fair deformability
  • Walls & floors
  • Interior / exterior
  • Low emission level of VOC
  • Perfect addition to all materials
  • Excellent workability

Need a bespoke deal or spotted a pallet deal cheaper than ours? We can usually beat it! 0333 344 2655 or info@buythepallet.co.uk

~ FREE FAST 24-48HRS DELIVERY on BAL, MAPEI, ARDEX, KERAKOLL: If ordered before 12pm ~

£441.90£841.40 +VAT

£441.90 +VAT
£618.35 +VAT
£841.40 +VAT

Mapei Keraflex Tile Adhesive extended information

  • Pot life of mix: more than 8 hours.
  • Open time: 30 minutes.
  • Waiting time before grouting:
    – on walls: 4-6 hours;
    – on floors: 24 hours.
  • Set to light foot traffic: approx. 24 hours.
  • Ready for use: approx. 14 days.
  • Colours: grey and white.
  • Application: N° 4, 5, 6 or 10 notched trowel.
  • EMICODE: EC1 Plus – very low emission.
  • Storage: 12 months (25 kg bags), 24 months (5 kg bags).
  • Consumption: 2-5 kg/m².
  • Packaging: 25 kg bags and 4×5 kg Alupack boxes.

Where to use

Interior and exterior bonding of ceramic tiles, porcelain, natural stone materials (not sensitive to moisture) and mosaics on floors and walls. Also suitable for spot bonding of insulating materials such as expanded polystyrene, rock and glass wool, Eraclit® (wood-cement panels), sound-deadening/ reduction panels, etc.

  • Bonding ceramic tiles, natural stone and mosaics on the following substrates
  • cement rendered walls;
  • interior aerated concrete block walls;
  • gypsum or anhydrite after having first applied Mapei Primer G or Mapei Eco Prim T Plus;
  • underfloor heating installations;
  • cement screeds;
  • interior painted walls, as long as the paint is firmly anchored and resistant to alkalis;
  • waterproof membranes of Mapelastic, Mapegum WPS or Mapelastic AquaDefense.


  • Tiling over existing floor tiles, when primed with Eco Prim Grip Plus (Maximum tile size for tile on tile 300 x300 mm)
  • Bonding small format tiles in swimming pools and water features.
  • Bonding tiles to floors subject to heavy loading.



Do not use Keraflex:

  • On concrete subject to shrinkage.
  • On metal surfaces.
  • For installations that require an adhesive thickness greater than 5 mm.
  • On walls and floors subject to strong movement or vibration.

Mapei Keraflex Application Procedure

Preparation of the substrate

The substrate must be flat, free of contamination, loose particles, grease, oils, paints, wax, etc. Damp substrates can slow down the curing of Mapei Keraflex.

Cement substrates should not continue to shrink after the installation of the ceramic tiles. Renders must cure at least 2 weeks and cement screeds must have an overall cure time of at least 3 weeks, unless they are produced with special binders such as Mapecem, Mapecem Pronto, Mapei Topcem or Topcem Pronto Concrete substrates must be at least 6 weeks old.

Dampen with water to cool surfaces which have become heated from exposure to sunlight.

Gypsum plaster and anhydrite screeds must be perfectly dry (max. residual moisture 0.5%), sufficiently hard and free from laitance. Mechanically abrade anhydrite screeds to remove all laitance, vacuum and prime. It is essential that they be treated with Mapei Primer G (neat) or Mapei Eco Prim T Plus (diluted 1:2 with water).

Heated screeds must be commissioned in accordance with recognised technical regulations and the guidelines given in BS 5385 parts 3, 4 and 5


Mix Mapei Keraflex with clean water until a smooth, lump-free paste is obtained. Leave to rest approximately 5 minutes and re- stir. Use 25-27 parts water for every 100 parts by weight of Keraflex Grey and 26-28 parts water for every 100 parts by weight of Keraflex White, which is equal to approx. 5.0-5.4 litres of water for every 20 kg of grey powder, and 5.2-5.6 litres of water for every 20 kg of White powder. Mixed this way, Keraflex has a pot life of approximately 8 hours.

Applying the product

Keraflex is applied to the substrate using a notched trowel. Choose a trowel that gives the correct coverage to the tile back, depending on the expected service conditions.

To achieve good adhesion, spread an initial thin layer of Keraflex on the substrate using the flat side of the trowel. Immediately, apply Keraflex using a suitable notched trowel, depending on the type and size of the tiles (see “Consumption”).

For external ceramic tiling, tiles greater than 300×300 mm, floors subject to heavy loads, when applying in swimming pools and water features, spread the adhesive on the back of the tile (back-buttering) in order to ensure complete coverage. Maximum bed depth of 5 mm.

Installing Tiles

Do not wet the tiles before installing them. Only with very dusty backs is it recommended to dip the tiles in clean water.

Allow to dry before fixing

Tiles should be installed with firm pressure to ensure good coverage with the adhesive.

Ensure that a minimum coverage of 65-70% to the back of the tile is achieved in dry wall areas with 100%, as for as possible, in wet wall areas, on floors and in exteriors (walls and floors).

In normal temperature and humidity conditions, the open time of Mapei Keraflex is approximately 30 minutes. Unfavourable weather conditions (strong sun, drying wind, high temperatures, etc.) or a highly absorbent substrate can reduce the open time to just a few minutes.

It is therefore necessary that careful checks are made to ensure that a skin does not form on the surface of the spread adhesive.

It is not recommended to wet the adhesive with water once a skin has formed because, the water will form an anti-adhesive film.

If necessary, tiles should be adjusted within 60 minutes of installation.

Spot-bonding insulating materials

For spot-bonding sound-deadening or insulating panels, apply Mapei Keraflex with a trowel or a float.

Grouting and movement joints

Wall joints can be grouted after 4-8 hours and floor joints can be grouted after 24 hours with the relevant MAPEI cementitious or epoxy grouts, available in different colours. Expansion joints must be sealed with a suitable MAPEI sealant.

Mapesil AC silicone sealant is available in matching colours to grout. Use Mapesil LM for natural stone.

Set to light foot traffic

Floors are able to take light foot traffic after approx. 24 hours.

Technical Characteristics

Mapei Keraflex is a grey or white powder composed of cement and graded aggregates. It contains a high quantity of synthetic resins and special additives created according to a formula developed in MAPEI R&D Laboratories.

A mortar with the following features is obtained when mixed with water:

  • Easily workable.
  • Highly thixotropic; Keraflex can be applied on a vertical surfaces without slump or tile slip, even with heavy tiles. Tiles can be installed from the top towards the bottom without using spacer pegs;
  • Perfect adhesion to all materials normally used in building.
  • Hardens with minimal controlled shrinkage.
  • Extended open time.
  • Water and frost resistant.
  • Excellent bond strength

Ready for use

Tiling installed with Keraflex must not be washed or exposed to rain for at least 24 hours and must be protected from frost and strong sun for at least 5-7 days. Surfaces are ready for use after approx. 14 days Swimming pools and water features can be filled after 21 days.


Tools and containers should be cleaned with plenty of water while Keraflex is still wet. Surfaces should be cleaned with a damp cloth, before the adhesive dries.


Bonding ceramic tiles:

  • Mosaics and small sizes in general: 2 kg/m2
  • Normal sizes: 2.5-3 ka/m2
  • Large sizes, exterior floors: 5 kg/m2


Mapei Keraflex white and rev is available in 20 kg paper bags.


Mapei Keraflex can be stored 12 months in a normal environment in original packagina. Protect from humidity.

Mapei Keraflex product identity

Colour:white or grey
Bulk density (kg/m3):1,300
Dry solids content (%):100
EMICODE:EC1 Plus - very low emission

Mapei Keraflex application data

Mixing ratio:25-27 parts water for every 100 parts by weight of Keraflex
Grey, 26-28 parts water for every 100 parts by weight of
Keraflex White
Consistency of the mix:smooth paste
Density of the mix (kg/m3):1,500
pH of mix:13
Pot life:4-8 hours
Application temperature range:from +5°C to +40°C
Open time (according to EN 1346):> 30 minutes
Adjustability time:approx. 60 minutes
Ready for grouting on walls:after 8 hours
Ready for grouting on floors:after 24 hours
Set to light foot traffic:24 hours
Ready for use:14 days

Mapei Keraflex final performances

Bonding strength according to EN 1348 (N/mm7):
- initial bonding (after 28 days):
- bonding after heat exposure:
- bonding after immersion in water:
- bonding after freeze/thaw cycles:

- 2.2
- 2.0
- 1.5
- 1.7
Resistance to alkalis:excellent
Resistance to oils:excellent (poor to vegetable oils)
Resistance to solvents:excellent
Temperature when in use:from -30°C to +90°C

Mapei Keraflex Adhesive video



20Kg bags

Based on 0 reviews

0.0 overall

Be the first to review “Mapei Keraflex Adhesive 20Kg – Pallet Deals and Bulk Buy – High Performance Polymer Modified Adhesive”

There are no reviews yet.


Buy The Pallet - Tile Adhesive and Floor Levellers Discount Store

5.0Out of 5 stars

Overall rating out of 16 Google reviews

Phil Down
3 hours ago

They actually answered the phone, were polite, knowledgeable and the order was delivered in full and on time. Would fully recommend both on price and service. Thank you.

3 weeks ago

BTP very helpful in supplying a pallet of floor leveller. I needed it on the Saturday, but didn’t want it sitting on the driveway for several days. I called and they recommended ordering for Thursday to give a day’s grace in case of any delivery issues. In the event the pallet arrived on Thursday as requested. Reliable and good value

Gary Harper
2 months ago

Great service, great price and great communications. We will definitely use Buy The Pallet again

Adrian W
4 months ago

Great service and delivery! Ordered all that I needed in one go and it was delivered to the back door wrapped and protected from the snow! Pallet even made it so that the goods were dry off the ground.

Stephen Tucker
4 months ago

Great customer service and at an unbeatable price. All delivered on the day I needed it.

Boon Teo
4 months ago

Great prices with a good ranges of products . Customer Service is excellent!

Max Simpson
5 months ago

Very helpful!

Neil Salih
3 years ago

Peter Bostock
3 years ago

I purchased a pallet of these and I am very impressed from ordering to receiving my pallet and the delivery guys were very helpful as well .I will definitely recommend and use this company again .Highly recommend

Kev in
3 years ago

Amazing knowledge and great prices! Definitely using these guys on a regular basis for my pallet deals on levellers and adhesive

Rob Faulkner
3 years ago

Fantastic experience with Buy The Pallet. Everything I needed to complete a large flooring project, quick delivery & quality products.

Richard Fairlie
3 years ago

Great service and really good pricing! Super fast delivery and really lovely guy!

Marc. T
3 years ago

Very helpful