► Soudal | Polyurethane Sealant/Adhesives

Soudaflex PU Sealants That Flex, Seal & Hold Under Movement Sealants don’t fail when everything’s sitting still. They fail when materials start moving. Concrete shifts, steel expands, joints open up & that’s where cracks form, water gets in & bonds break down. Soudal polyurethane sealant & adhesive systems are built...

Soudaflex PU Sealants That Flex, Seal & Hold Under Movement

Sealants don’t fail when everything’s sitting still. They fail when materials start moving. Concrete shifts, steel expands, joints open up & that’s where cracks form, water gets in & bonds break down. Soudal polyurethane sealant & adhesive systems are built for exactly that. This is flexible PU sealing that holds under movement, not just at install.

This range includes Soudaflex polyurethane sealants, high-performance PU adhesive sealants & flexible construction sealants designed for expansion joints, structural bonding & exposed applications. These products bond aggressively to concrete, metal, timber & masonry while staying flexible enough to absorb movement without cracking or losing adhesion.

To cover full sealing & bonding work, trades pair these with Adhesives & Tapes, Roof Sealants & Adhesives & Concrete Repair & Restoration. For controlled application & clean joints, run them with Caulking Guns, Hand Tools, Measuring & Layout Tools & Safety & Personal Protective Equipment so every seal holds first time.

What’s in This Collection:

► Soudaflex polyurethane sealant
‣ Flexible construction sealant designed for expansion joints & movement zones

► Soudaflex PU joint sealant
‣ Maintains seal integrity across concrete joints, panels & structural gaps

► Polyurethane sealant adhesive (PU hybrid systems)
‣ Bonds & seals in one step across mixed construction materials

► High-performance PU construction adhesive
‣ Strong bonding for timber, steel & concrete under load

► Flexible PU adhesive sealant
‣ Absorbs expansion, vibration & movement without cracking

► Weather-resistant polyurethane sealant
‣ Built for external exposure, moisture & temperature variation

► Fast curing PU sealant adhesive
‣ Reduces downtime between sealing & finishing stages

► Gap-filling PU sealant
‣ Bridges uneven joints while maintaining flexibility & adhesion

On site, polyurethane isn’t optional where movement exists. It’s what keeps joints sealed long after rigid products fail.

Trade Applications for Soudal Polyurethane Sealant & Adhesive

This is where PU sealants prove their value, in jobs where movement, load & exposure all hit at once.

► Expansion joint sealing (PU sealant)
 ‣ Flexible polyurethane sealant absorbs structural movement without cracking

► Concrete joint sealing & repair
 ‣ Maintains long-term sealing across slabs, panels & precast sections

► Roofing & external weather sealing
 ‣ Resists water ingress while staying bonded under temperature changes

► Metal fabrication & structural bonding
 ‣ Bonds components while handling vibration & movement

► Window, door & façade sealing
 ‣ Seals frames against air & moisture without rigid failure

► Industrial maintenance & retrofit work
 ‣ Re-seals failed joints in ageing structures without full replacement

Across construction, fabrication workshops & industrial maintenance, PU sealant adhesives stop failures before they start.

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  • Soudal - Soudaflex 33SL Self Leveling Sealant 600ml 12 units (box) | 130635-12
    Soudal - Soudaflex 33SL Self Leveling Sealant 600ml 12 units (box) | 130635-12
    Soudal Soudaflex 33SL Self Leveling Sealant 600ml 12 units (box) | 130635-12This Soudal polyurethane sealant delivers high mechanical performance and chemical resistance for demanding bonding and sealing on concrete, metal and more. Flexible when cured, it combines structural strength with a durable, lasting seal.►...
    $309.00
    $0.00
    $309.00
  • Soudal - Soudaflex 45FC Pro 600ml White / 12 units (box) | 146019-12
    Soudal - Soudaflex 45FC Pro 600ml White / 12 units (box) | 146019-12
    Soudal Soudaflex 45FC Pro 600ml White / 12 units (box) | 146019-12This Soudal polyurethane sealant delivers high mechanical performance and chemical resistance for demanding bonding and sealing on concrete, metal and more. Flexible when cured, it combines structural strength with a durable, lasting seal.►...
    $183.24
    $0.00
    $183.24
  • Soudal - Aquaswell 600ml 12 units (box) | 124909-12
    Soudal - Aquaswell 600ml 12 units (box) | 124909-12
    Soudal Aquaswell 600ml 12 units (box) | 124909-12Genuine Soudal product from the experts in sealants, foams and adhesives. Established in Belgium in 1966, Soudal is the largest independent European manufacturer of sealants, adhesives and polyurethane foams, trusted across more than 150 countries.► Key Features...
    $621.96
    $0.00
    $621.96
  • Soudal - Soudaflex 20LM 600ml White / 12 units (box) | 127290-12
    Soudal - Soudaflex 20LM 600ml White / 12 units (box) | 127290-12
    Soudal Soudaflex 20LM 600ml White / 12 units (box) | 127290-12This Soudal polyurethane sealant delivers high mechanical performance and chemical resistance for demanding bonding and sealing on concrete, metal and more. Flexible when cured, it combines structural strength with a durable, lasting seal.► Key...
    $198.72
    $0.00
    $198.72
  • Soudal - Soudaflex 36FL Floor Joint Sealant 600ml 12 units (box) | 130725-12
    Soudal - Soudaflex 36FL Floor Joint Sealant 600ml 12 units (box) | 130725-12
    Soudal Soudaflex 36FL Floor Joint Sealant 600ml 12 units (box) | 130725-12This Soudal polyurethane sealant delivers high mechanical performance and chemical resistance for demanding bonding and sealing on concrete, metal and more. Flexible when cured, it combines structural strength with a durable, lasting seal.►...
    $309.00
    $0.00
    $309.00
  • Soudal - Soudaflex 42FX 600ml Black / 12 units (box) | 146913-12
    Soudal - Soudaflex 42FX 600ml Black / 12 units (box) | 146913-12
    Soudal Soudaflex 42FX 600ml Black / 12 units (box) | 146913-12This Soudal polyurethane sealant delivers high mechanical performance and chemical resistance for demanding bonding and sealing on concrete, metal and more. Flexible when cured, it combines structural strength with a durable, lasting seal.► Key...
    $156.24
    $0.00
    $156.24
  • Soudal - Dripless Skeleton Gun Yellow 24 units (box) | 111072-24
    Soudal - Dripless Skeleton Gun Yellow 24 units (box) | 111072-24
    Soudal Dripless Skeleton Gun Yellow 24 units (box) | 111072-24This Soudal applicator tool is purpose-built to work seamlessly with Soudal sealants, adhesives and foams, simplifying every step of application. Quality construction for precise, efficient, professional results.► Key Features Purpose-built for Soudal products Precise efficient...
    $419.28
    $0.00
    $419.28
  • Soudal - 50mm Open Cell Backer Rod Default Title | 110288
    Soudal - 50mm Open Cell Backer Rod Default Title | 110288
    Soudal 50mm Open Cell Backer Rod Default Title | 110288Genuine Soudal product from the experts in sealants, foams and adhesives. Established in Belgium in 1966, Soudal is the largest independent European manufacturer of sealants, adhesives and polyurethane foams, trusted across more than 150 countries.►...
    $366.39
    $0.00
    $366.39
  • Soudal - 30mm Open Cell Backer Rod Default Title | 110286
    Soudal - 30mm Open Cell Backer Rod Default Title | 110286
    Soudal 30mm Open Cell Backer Rod Default Title | 110286Genuine Soudal product from the experts in sealants, foams and adhesives. Established in Belgium in 1966, Soudal is the largest independent European manufacturer of sealants, adhesives and polyurethane foams, trusted across more than 150 countries.►...
    $253.89
    $0.00
    $253.89
  • Soudal - 25mm Open Cell Backer Rod Default Title | 110285
    Soudal - 25mm Open Cell Backer Rod Default Title | 110285
    Soudal 25mm Open Cell Backer Rod Default Title | 110285Genuine Soudal product from the experts in sealants, foams and adhesives. Established in Belgium in 1966, Soudal is the largest independent European manufacturer of sealants, adhesives and polyurethane foams, trusted across more than 150 countries.►...
    $204.86
    $0.00
    $204.86

Sealing That Holds When Structures Start Moving

You don’t see joint failure straight away. It shows up later, when heat expands materials, when slabs shift, when movement starts pulling against the seal. That’s where rigid sealants break down. Polyurethane doesn’t. It stretches, flexes & stays bonded even when everything around it moves.

Soudaflex polyurethane sealants are built for those conditions. Expansion joints, external sealing, structural bonding points, these aren’t areas where you can afford cracks or separation. You need a seal that moves with the structure, not against it.

If the surface is damaged or uneven, use Concrete Repair & Restoration first so the sealant has a solid base. For exposed applications, pair with Roof Sealants & Adhesives to protect against water ingress & long-term breakdown.

Stock is ready with Same day dispatch & if you’re managing multiple jobs or ongoing projects, access is supported through Trade exclusives to keep supply consistent.

► Trade-grade polyurethane sealants built for movement & long-term hold
► Proven Soudaflex performance across construction & industrial applications
► Bulk supply options for contractors, builders & maintenance teams
► Fast Australia-wide delivery so jobs don’t stall

Get the Right PU Sealant & Stop Joint Failures Early

Joint failure doesn’t start big. It starts small, a crack, a gap, a weak seal that gives way under pressure. The right polyurethane sealant stops that before it spreads.

Use Soudaflex for expansion joints, flexible sealing & structural bonding where movement is constant. Get it right first time & you won’t be coming back to fix it.

Frequently Asked Questions

Yes. Most PU sealants can be painted once cured, making them suitable for visible joints or finished surfaces.

Surfaces should be clean, dry & free of dust, oil or loose material to ensure proper adhesion.

Yes. It has strong initial grab & holds position without sagging when applied correctly.

Quality PU sealants like Soudaflex are designed to maintain volume with minimal shrinkage after curing.

Yes. Its flexibility allows it to absorb vibration without cracking or breaking the seal.

It has good resistance to many environmental factors, though suitability depends on exposure type.

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