en_GB English (UK)
en_GB English (UK) fr_FR Français pl_PL Polski nl_BE Nederlands (België) de_DE Deutsch hu_HU Magyar ro_RO Română cs_CZ Čeština

Polyurethane sealant: elasticity, adhesion and durability

What is polyurethane sealant?

Le polyurethane sealant (or PU putty) is a single- or two-component product designed to produce flexible, durable and adherent seals on a wide variety of materials. 
It polymerises on contact with moisture in the air or by chemical reaction to form a elastomer jointIt's a material that absorbs movement, resists the elements and provides a perfect seal. 

It is particularly appreciated in the fields of construction, transport, automotive, heavy industry and energy.for its ability to bonding, sealing and compensating for deformation between rigid or dissimilar supports. 

Polyurethane sealant is distinguished by : 

  • A excellent adhesion without primer on most materials.
  • A permanent flexibility even in extreme conditions. 
  • A high resistance to shock, vibration, UV, water and chemicals. 
  • A easy to use manual or automated. 
Contact ADDEV
Polyurethane putty 3M 590
3M polyurethane sealant

Advantages of polyurethane sealant

The use of polyurethane mastic offers many technical and economic benefits: 

  • Material versatility Adheres to concrete, aluminium, steel, wood, PVC, glass, tiles, etc. 
  • Durable elasticity compensates for expansion, movement or vibration 
  • Perfect seal barrier against water, air, dust and chemicals 
  • Good mechanical resistance : resistance to tearing, shearing and peeling 
  • Can be painted after polymerisation (depending on product) 
  • Excellent outdoor performance UV, ageing, weathering 
  • Adjusted setting time fast- or slow-setting versions depending on application 
  • Easy application manual, pneumatic or automated spray guns 

It's a solution all-in-one for a wide range of flexible bonding, sealing and absorption of mechanical stresses. 

Building and construction sector 

  • Expansion joints in concrete, cladding, floors or facades 
  • Sealing of façade elements, panels or metal structures 
  • Can be used on damp, rough surfaces, indoors and outdoors 

Automotive, heavy goods vehicle and rail industries 

  • Assembly of bodywork parts or structural elements 
  • Bonding roofs, bonnets, spoilers, plastic or composite parts 
  • Sealing joints between panelsglazing or mobile structures 
  • Very good resistance to vibrations, shocks and climatic variations 

General industry and mechanical engineering 

  • Fixing and sealing components exposed to mechanical stress 
  • Application on metal structures, electrical cabinets, ducts, enclosures, etc. 
  • Resists oils, light solvents, chemical sprays 

Energy, shipbuilding, wind power and special transport 

  • Used for assembly of hulls, modules and mobile structures 
  • Resistance to salt sprayhumidity, UV 
  • Compatibility with demanding environments: marine, humid, with a wide temperature range 

Single-component PU sealant 

  • Hardens in humid air
  • Simple application without mixing
  • Ideal for construction, finishing work and maintenance 

Two-component PU sealant 

  • Fast, controlled curing
  • Better dimensional stability 
  • Use in industrial production (bodywork, line assembly, etc.) 

PU putty for paint 

  • Can be painted after polymerisation
  • Good resistance to paint solvents
  • For use on building sites, joinery and cladding 

Flame-retardant PU mastic / fire-smoke standards 

  • Compliant EN45545 (railway), UL94, FAR 25 (aeronautics)
  • Controlled fire behaviour
  • For use on cables, ducts and technical compartments 

The polyurethane sealants offered by ADDEV Materials are available in certified versions: 

  • EN15651 for the building industry (façade joints, floors, sanitaryware) 
  • EN45545, UL94, ISO 11600, CE, FDA depending on the application 
  • REACH / RoHS / halogen free compliance 
  • Laboratory-tested mechanical, thermal and chemical resistance 
  • Technical data sheets (TDS), SDS, certificates of origin or conformity 

 

We select our formulations from the best manufacturers on the market (Bostik, Sika, 3M, Henkel) or develop solutions to specific specifications. 

Calling on ADDEV Materialsis to benefit: 

  • A wide range of polyurethane sealants single and two-component in stock 
  • A expert technical support depending on your application environment 
  • From adapted formats cartridges, flexible bags, drums, customised packaging 
  • From a traceability and regulatory compliance on each batch delivered 
  • A a recognised multi-market partner industry, railways, construction, energy, mobility 

 

We can help you integrate the right sealant into your process, optimise its application and guarantee its performance over time. 

Contact our ADDEV Materials experts ! 
 We can help you choose the right polyurethane sealant for your application. 
 📞 Contact us now for personalised advice! 

Contact ADDEV

Our strategic suppliers of polyurethane sealants

3M logo
Bostik logo

FAQ - Polyurethane sealant

It is a single- or two-component sealant which hardens to form a flexible, elastic and adhesive sealcapable of ensuring sealing and bonding on a wide range of materials, both indoors and out. 

Le PU putty is can be paintedhas a better adhesion on porous substratesand a superior mechanical strength. Le silicone sealant is better suited to very humid environments or those exposed to extreme temperature variations. 

Yes, polyurethane sealant adheres perfectly to aluminium, stainless steel, galvanised steel... often without primer. It is used in bodywork, construction, railways and maintenance. 

Yes. Most PU sealants single-component can be painted once fully cured. However, it is advisable to carry out a test application with the paint used. 

Yes. It has a excellent UV, water and freeze/thaw resistanceas well as external mechanical stresses (wind, shock, vibration).