Soudal Fix All Flexi

Soudal Fix All Flexi

Soudal | SMX® Hybrid Polymer

Soudal Fix All Flexi (Formerly named Soudal Fix All Classic) is a multi-use Sealant, Adhesive and Filler based on SMX® Hybrid Polymer.

Soudal Fix All Flexi can be applied in all weather conditions (including wet and damp surfaces), internally and externally.

Soudal Fix All Flexi contains no solvents or odours and has primerless adhesion on most construction materials. Overpaintable with most paints.

Non-staining on porous natural stones. Suitable for sanitary applications.


Soudal Fix All Flexi

  • Multi-Use Product

  • Stays elastic after curing and very sustainable

  • Excellent adhesion on nearly all surfaces, even if slightly moist.

  • Can be painted with water based systems

  • No odour.

  • Very low emission, EC1 PLUS R certified

  • Impervious to mould, contains ZnP (biocide with fungicidal action)

  • Does not contain solvents, isocyanates, acids, halogens and toxic components, completely neutral.

  • Colourfast.

  • Good colour stability, weather and UV resistance


Typical Applications:

  • For all bonding, sealing and filling applications in all weather conditions, on most surfaces.

  • Paintable and elastomeric sealing and bonding.

  • Bonding and sealing of porous natural stone surfaces such as marble and limestone.

  • Sanitary sealing and bonding - kitchens, bathrooms, showers etc.

Surface Preparation:

Porous surfaces in water loaded applications should be primed with Soudal Primer 150.

Smooth surfaces should be degreased before bonding them together. We recommend a preliminary adhesion test on every surface.

Fix-All® Flexi has an excellent adhesion on most common substrates: All usual building substrates, natural stone, treated wood, PVC, plastics.

Fix All® Flexi has been tested on the following metal surfaces: Steel, AlMgSi1, brass, electrolytic galvanised steel, AlCuMg1, flame galvanised steel, AlMg3 and steel ST1403.

Fix All® Flexi also has a good adhesion on plastics: Polystyrene, polycarbonate (Makrolon®), PVC, ABS, polyamide, PMMA, fiberglass reinforced epoxy, polyester.

While producing plastics very often releasing agents, processing aids and other protective agents (like protection foil) are used. These should be removed prior to bonding.

NOTE: Bonding plastics like PMMA (e.g. Plexi® glass), polycarbonate (e.g. Makrolon® or Lexan®) in stress loaded applications can give rise to stress cracking and crazing in these substrates. The use of Fix All® Flexi is not recommended in these applications.

There is no adhesion on PE, PP, PTFE (Teflon®) and bituminous substrates. We recommend a preliminary compatibility test.

Application Method:

  • Application: With manual or pneumatic Caulking Gun.

  • Cleaning: With Sealant Remover immediately after use.

  • Finishing: With a soapy solution or Soudal Finishing Solution before skinning.

  • Repair: With the same material

Joint Dimensions:

  • Minimum Width for Bonding: 2 mm

  • Minimum Width for Joints: 5 mm

  • Maximum Width for Bonding: 10 mm

  • Maximum Width for Joints: 30 mm

  • Minimum Depth for Joints: 5 mm

  • Recommendation Sealing Jobs: Joint Width = 2 x Joint Depth


  • Fix All® Flexi may be overpainted with water based paints, however due to the large number of paints and varnishes available we strongly suggest a compatibility test before application.

  • The drying time of alkyd resin based paints may increase.

  • Fix All® Flexi can be applied to a wide variety of substrates. Due to the fact that specific substrates such as plastics, like polycarbonate etc... may differ from manufacturer to manufacturer, we recommend preliminary compatibility test.

  • Fix All® Flexi can not be used as a glazing sealant.

  • Not suitable for bonding aquariums.

  • Fix All® Flexi can be used for adhering of and sealing on natural stone.

  • When applying, make sure not to spill any sealant on the surface of materials.

  • The sanitary formula should not replace regular cleaning of the joint. Excessive contamination, deposits or soap remainings will stimulate the development of fungi.

  • A total absence of UV can cause a colour change of the sealant.

Data Sheets

Technical Data Sheet

Fix-All® Product Selector

Safety Data Sheet

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£3.60 ex. VAT | £4.32 inc. VAT

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