Highly elastic sealant

  • Creates expansion joints in tiled areas
  • For wet rooms and sanitary installations
  • For indoor and outdoor use
  • Fungus and mould resistant
  • Does not discolour natural stone
  • Suitable for swimming pool
  • Suitable for facades
  • Joint width from 5 to 15 mm

Product calculator

Product facts


High-elastic, one-component sealant on the basis of silicone rubber .
Cures neutrally when exposed to air humidity


Available in colours to match cement-based Alfix grout range: brilliant white, grey, pale grey, steel grey, graphite, anthracite, black grey, light beige and jura beige. Colour swatches available on request.



Joint dimension B x D
Linear metres per cartridge
6 x 3 mm
approx. 16.0
8 x 4 mm
approx. 9.0
10 x 5 mm
approx. 5.5
10 x 10 mm
approx. 2.7
15 x 7 mm
approx. 2.5


Available in 300 ml cartridges.


Unit Colour Code No. SDB DoP
0,30 liter patron Pale grey 6110 Klik her Klik her 
0,30 liter patron Grey 6120 Klik her  Klik her 
0,30 liter patron Black grey 6130 Klik her  Klik her 
0,30 liter patron Graphite 6150 Klik her  Klik her 
0,30 liter patron Steel grey


Klik her  Klik her 
0,30 liter patron Light beige 6170 Klik her  Klik her 
0,30 liter patron Jura beige 6175 Klik her  Klik her 
0,30 liter patron Anthracite 6180 Klik her  Klik her 
0,30 liter patron Brilliant white 6190 Klik her   Klik her


Due to neutral curing, Alfix M-Silicon will not cause any colour alteration of acid-sensitive materials, such as natural stone and hence, the product is very suitable for marble, granite, travertine, etc.
Also ideal for sealing facades with ceramic tiles as the product does not attract dirt.
Alfix M-Silicone retains elasticity and produces a long life weather- and waterproof joint resistant to mildew (sanitary type).


Expected Result

The joint should be smooth with an even surface, free from holes or lines. Avoid inappropriate working or late smoothing, as this may leave noticeable lines or holes.

The joints should be filled to a depth suitable for the tiles and their intended use. Shape the joint so it is not any deeper than the tiles to prevent water from accumulating on the surface. Shape joints along vertical boundaries with a run-off away from the vertical surface.

After curing, the joint should be solid with secure adhesion to the tile edges. The joint cures on contact with ambient humidity; applying a little water when smoothing will accelerate membrane formation. Excessive water will disrupt curing. Moist surfaces will prevent adhesion. For maximum elasticity, join two edges only. That is why a backstop or tape should be used at the base. To check tile edge adhesion, carefully probe the middle of the joint with a blunt, approximately 50 mm long instrument.

All joints will change colour over an extended period – no joint will be the same colour after years of use as it was at first.
Colour fading or discoloration of silicone joints triggered by chemical interactions with cleaning agents or their vapours, off-gassing from paint or wood furniture or similar are not covered by the warranty.


Particularly suitable for expansion joints in ceramic surfaces, sealing around pipe passages, and sanitary installations.
Excellent adhesion without priming to glass, ceramic tiles, marble, natural stone, enamel, metals, painted surfaces, and varnished wood.


Surface preparation

Fixing dowels






Alfix A/S H.C. Ørsteds Vej 11-13 DK-6000 Kolding alfix.com

DOP No. 41

EN 15651-3
Alfix M-Silicon
Sealant for facade for
interior and exterior
application and for joints
Reaction to Fire (EN 13501) NPD Release of chemicals dangerous to the environment and health See product safety sheet on www.alfix.com
Conditioning: Method A (ISO 8340). Substrate: Glass without primer, aluminium without primer.
Water tightness and air tightness
Resistance to flow (ISO 7390) ≤ 2 mm Evaluation of the action
of microorganisms (ISO
Loss of volume (ISO 10563) ≤ 10% Durability (EN 15651) Pass
Tensile properties at
maintained extension
after immersion in water
(ISO 10590)
No failure    

Tile fixing

Tile fixing


EN 15651
Alfix M-Silicon conforms to the rules of FDA CFR Section 21 177.2600 as well as EC No 1935/2004 concerning
materials and items that may come into indirect contact with food.


Technical data

Working temperature

-20°C - +40°C


1.33 kg/litre

Formation of skin

10 – 30 minutes

Curing speed

approx. 1 mm/day

Temperature resistance

-40°C - +150°C


approx. 24 shore A

Maximum movement

+/- 25% of original joint width


approx. 7%

Shelf life

Min. 12 months in unopened cartridges. Store cool.

How to use


Surface preparation

General information: Bonding surfaces must be dry and clean. Vacuum and degrease the area with acetone or methylated spirits.
Bare metal and plastic should be sanded (keyed).
For tiled surfaces, joints must be free of sealant and caulk through to the underlying surface. Bonding surfaces must be the full thickness of the tile. Backstop deeper joints with plastic foam (semicircular strips) or similar to the lower edge of the tile so that
the depth at the middle of the joint is approximately half the width of the joint. The edges must be exposed.
Swimming pools: The bonding surfaces in swimming pools must always be primed and the joint width must be between 10 and 15 mm. Use a backstop material suitable for this application. Run masking tape along the edges of the tiles. Apply an even layer of Alfix P-Primer onto both bonding surfaces and leave the primer to dry completely.

How to use

Use masking tape to protect tiles.
Fill joints completely using appropriate gun. Finish off within 15 minutes by smoothing using a damp tool, such as smoothing kit or joint nail.
Remove any masking tape immediately after smoothing.



Uncured sealant: Acetone
Cured sealant: mechanical

January 2021

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