Mapei Rapid Set 20kg


£19.91 inc. VAT
£16.59 ex. VAT

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  • Product ID: 012420
  • Suitable For: installing most types of ceramic tiles
  • Area of use: INT & EXT
  • Application Method: trowel
  • Volume: 20KG
  • Container Type: bag
  • Type: adhesive
  • Colour: grey
  • Brand: Mapei
  • Manufactuer: Mapei
  • Box Size: 1

 

Rapid Set is a fast-setting, grey cement-based adhesive for internal and sheltered external ceramic floor tile installations. Comprising special binders, synthetic resins, selected aggregates, and accelerators, it provides good bond strength within 3 hours, allowing light foot traffic for grouting and limited access. Floors are ready for full use after 24 hours and, once cured, Rapid Set is both water-resistant and frost-proof.

 

Key points:

  • Suitable for installing most ceramic and porcelain tiles, as well as natural stone indoors.
  • Designed for small to medium installations on stable substrates like concrete or sand-cement screed.
  • Supports tile sizes up to 300 x 300 mm with a quick curing time for grouting access within 3 hours.
  • Fully cured surfaces are durable, water-resistant, and frost-proof, ready for use in 24 hours.

 

 

 

For more information about Mapei and their products, please visit their website here.

For our full Mapei range, click here. For more in our range of adhesives, click here.

 

 

Rapid Set is suitable for installing most types of ceramic tiles in interior and sheltered exterior locations, this adhesive is ideal for fixing porcelain tiles and natural stone to stable substrates, such as concrete or sand-cement screed, in small to medium-sized installations (max tile size: 300 x 300 mm).

Some application examples:

  • Rapid installation or repairs in areas with limited downtime.
  • Use in kitchens, bathrooms, and sheltered balconies.
  • Light to medium-duty settings, like homes, small retail spaces, and boutique hotels.
  • Suitable for substrates including concrete, sand-cement screed, render, and gypsum plaster.
  • Ideal for ceramic tiles in domestic showers, though not for commercial wet rooms.

 

 

Preparation of the Substrate
Apply Rapid Set only to stable, dry substrates free from oils, grease, wax, laitance, curing agents, dust, loose areas, cracks, or any contaminants that could hinder adhesion. Cement-based screeds should be at least 3 weeks old, concrete a minimum of 6 weeks, gypsum plaster at least 4 weeks (and primed with Primer G), and sand-cement render a minimum of 2 weeks old. For vertical tile installation, consider using a batten as needed.

 

Mixing
Mix Rapid Set with clean water, stirring continuously to create a smooth, lump-free paste, ideally using a mechanical stirrer. The mix should be used within 15-20 minutes, as it begins to set quickly. For a 20 kg bag, add 3.8-4.2 liters of water. Let the mixture stand briefly, then stir again before applying.

 

Applying the Product
Apply Rapid Set to the substrate with a notched trowel to a maximum thickness of 5 mm. Choose a trowel that achieves at least 65-70% coverage on tile backs for dry interior walls, and 100% coverage for floors, exteriors, and interior wet areas. Dampen highly absorbent substrates or prime with Primer G to extend open time, especially in hot weather. Do not wet the tiles before installation; for dusty backs, wipe with a damp sponge.

 

Working Time and Adjustments
Rapid Set’s open time is approximately 10 minutes in normal conditions, though heat, wind, or highly absorbent substrates can shorten this drastically. Regularly check for skin formation on the adhesive; if it forms, remove and reapply fresh adhesive without adding water, as this will weaken adhesion. Tile adjustments should be made within 5-10 minutes of laying. Protect newly installed tiles from light rain for at least 3 hours and from frost or intense sun exposure for at least 24 hours.

 

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Elementlength
up to
1,5 m
up to
2,5 m
up to
3,5 m
up to
4,5 m
up to
2,5 m
up to
3,5 m
up to
4,5 m
Type of window frame material Minimum witdth of joints
for a butled mounting b in mm
Minimum witdth of joints
for a inner mounting b in mm
Hard PVC (white) 10 15 20 25 10 10 15
Hard PVC and PMMA (dark)
(colour extruded)
15 20 25 30 10 15 20
Hard PUR integral foam 10 10 15 20 10 10 15
Wood-aluminium-window 10 10 15 20 10 10 15
Aluminium-plastic sandwich
frame (bright)
10 10 15 20 10 10 15
Aluminium-plastic sandwich
frame (dark)
10 15 20 25 10 10 15
Wooden window frame 10 10 10 10 10 10 10

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