Soudal Fix All Flexi: The Versatile Sealant for Any Job
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Fix ALL Flexi is a hybrid-polymer sealant and adhesive. Match its movement rating, surface limits and cure requirements to the joint, then confirm local availability.
Use Soudal Fix All Flexi to bond and seal. It sticks to concrete, brick, plaster, wood, metal, and plastics. It stays flexible after it cures.
Read on for what Fix All Flexi can do, how to apply it, and where it stops. That way you can pick the right job for it.
What is Soudal Fix All Flexi?
Soudal describes Fix ALL Flexi as an SMX hybrid-polymer sealant and adhesive. Its technical sheet says it adheres to many common building substrates, including slightly moist surfaces; porous surfaces may need primer in critical applications.
The current Soudal UK technical sheet lists ±20% allowed joint movement, interior and exterior use, and UV resistance. Match that movement rating to the joint; Soudal says Fix ALL Flexi is not a glazing sealant.
Key Features and Benefits
Soudal lists Fix ALL Flexi for sealing and bonding. Its UK technical sheet names common building substrates and slightly moist surfaces, while recommending preparation for critical applications.
The 8 May 2026 Soudal UK sheet describes low odour, very low emissions and EC1+ certification. It says the product can be painted with water-based systems; test compatibility with the chosen paint first.
How to Apply Soudal Fix All Flexi
Surfaces should be rigid, clean, and dry or slightly moist, with dust and grease removed. For critical applications, Soudal recommends pre-treatment; porous surfaces should be primed with Primer 150.
Apply with a manual, battery or pneumatic caulking gun. For a seal, apply a regular bead and tool it with a spatula and finishing solution, keeping the solution off the joint edges. The sheet lists about 10 minutes to skin and a cure speed of roughly 2–3 mm per 24 hours.
Common Mistakes and Limitations
Soudal says Fix ALL Flexi is not a glazing sealant, is not suitable for aquariums, and must not be used where continuous water immersion is possible. Avoid PE, PP, PTFE, bituminous materials, copper and copper-containing metals; stressed PMMA or polycarbonate can crack.
The 8 May 2026 Soudal UK sheet lists an application range of +5°C to +35°C (41°F to 95°F). Check the technical sheet supplied for the exact cartridge and market before applying it.
What surfaces does Soudal Fix All Flexi adhere to?
Soudal’s 8 May 2026 UK technical sheet lists common building substrates including acrylic baths, aluminium, ceramic tiles, lacquered wood, metal, concrete, brick, natural stone, plastics and PVC. Surfaces should be dry or slightly moist. It lists PE, PP, PTFE, copper and copper-containing materials as unsuitable.
Can Soudal Fix All Flexi be painted?
The 8 May 2026 Soudal UK technical sheet says Fix ALL Flexi can be painted with water-based paints. Soudal recommends testing compatibility with the specific paint first.
What is the temperature range for applying Soudal Fix All Flexi?
The 8 May 2026 Soudal UK technical sheet lists an application temperature of +5°C to +35°C (41°F to 95°F). Check the sheet supplied for the exact cartridge and market.
Manufacturer references
- Soudal Fix ALL Flexi product page Manufacturer applications and product image.
- English technical data sheet (revision 8 May 2026) Movement, substrate, application and curing limits.
Check local availability
Fix ALL Flexi is not listed in Cranco's current online catalogue. Contact a branch to confirm local availability or ask about a suitable alternative before planning around this exact product.