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Two-component sealant: performance, speed and industrial strength

What is a two-component sealant?

Le two-component sealantalso known as 2K sealantis a waterproofing and bonding solution made up of two separate components (resin + hardener), which must be mixed just before application. This formulation makes it possible to obtain a rapid, controlled and even curingwith superior mechanical properties than single-component sealants. 

Designed for demanding applications, the two-component sealant is widely used in the following sectors structural assembly, repair, caulking, filling or surface preparation. 
Available in different chemical bases (epoxy, polyurethane, methacrylate, polyester), it can be adapted to a wide variety of substrates and technical constraints. 

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Two-component sealant
Silicone resin BLUESIL RTV 148A 1kg Beige

Advantages of two-component sealant

The use of a two-component sealant means you can achieve the following performance levels superior and more consistentideal for industrial environments: 

  • Fast curing with no dependence on humidity 
  • Excellent mechanical strength traction, shearing, peeling 
  • High dimensional stabilityno shrinkage on polymerisation 
  • High adhesion on difficult substrates metal, composites, concrete, wood, ceramics 
  • Resistant to vibration, shock and thermal cycling 
  • Enhanced chemical resistance oils, solvents, fuels, salt 
  • Can be used in damp or low-temperature environments 
  • Suitable for high production rates thanks to its controlled setting time 

This is a highly reliable technical productideal for applications where safety, long-term durability and speed of execution are critical. 

Structural assembly and industrial bonding 

  • Bonding of sandwich panels, metals, reinforced plastics and composites 
  • Replacement of welds, rivets or mechanical fasteners 
  • Assembly subjected to dynamic loads or severe environments 
  • Use in the following sectors automotive, shipbuilding, railways, metal construction, aeronautics 

Repair and maintenance 

  • Reconstruction of broken or worn parts 
  • Crack fillingholes, surface defects 
  • Fast filling on concrete, metal, wood, polyester 
  • Work on site or in the workshop with low equipment downtime 

Reinforced sealing 

  • Production of durable chemical or structural seals 
  • Applications in thechemical industry, offshore, energy or infrastructure 

Surface preparation or smoothing 

  • Puttying before painting or coating 
  • Surface smoothing on uneven surfaces 
  • Reprofiling of technical parts before machining or bonding 

Two-component epoxy putty 

  • Very high rigidity and mechanical strength
  • Ideal for structural assembly, repair or rigid bonding
  • Excellent adhesion to metal, concrete and ceramics
  • High thermal and chemical resistance 

Polyurethane putty two-component 

  • More flexible than epoxy, better elasticity
  • Ideal for applications subject to vibration or deformation
  • Used in the transport, construction, industrial maintenance
  • Good resistance to water, moisture and thermal cycles 

Two-component methacrylate putty 

  • Adheres to difficult substrates without primer
  • Fast curing even in extreme conditions
  • Used for high-strength bonding or rapid repairs
  • Good impact and chemical resistance 

Two-component polyester putty 

  • Used for bodywork repairs, composites or laminates
  • Easy to sand, quick to cure
  • Good value for money for one-off repairs
  • Loaded or reinforced version depending on application 

At ADDEV Materialswe select two-component sealants comply with the strictest industrial standards: 

  • UL94 V-0, EN45545, FAR 25, REACH / RoHS, ISO 11600 
  • Certified mechanical strengthresistance to hydrocarbons, heat and humidity 
  • Internal tests substrate compatibility, setting time, shrinkage, hardness, elasticity 
  • Supply of TDS, SDS, certificates of conformity on request 
  • Available formats coaxial cartridges, syringes, flexible bags, buckets, pre-dosed kits 

ADDEV Materials provides you with : 

  • A multi-chemistry technical offer : epoxy, PU, methacrylate, polyester... 
  • A expert technical support for selecting the right 2K sealant 
  • From formats adapted to your application constraints manual or automated dosing 
  • From validated solutions in critical sectors rail, electronics, energy, mobility 
  • A application support compatibility tests, documentation, in-house or on-site tests 

Our priority is to help you reduce your intervention times, increase the durability of your assembliesand securing your industrial facilities or equipment. 

📞 Contact our ADDEV Materials teams as of now for a technical recommendationa quick quotationor a sample of two-component sealant adapted to your industrial project. 

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Our strategic suppliers of two-component sealants

3M logo
Henkel logo
Bostik logo

FAQ - Two-component sealant

It's a product made up of two elements (resin + hardener) to be mixed before application. It enables you to bonding, repairing, filling or sealing with superior performance and controlled curing. 

Le single-component mastic (1K) hardens with humidity and is more flexible. The two-component mastic (2K) offers higher mechanical strength, faster and more stable curing timeand a better adhesion on technical substrates. 

On a wide variety of substrates: metal, concrete, wood, plastic, composite, ceramicwith or without primer depending on formulation. 

Yes, some methacrylate or fast-setting epoxy versions allow you to repair or bonding in just a few minuteseven in difficult conditions (humidity, low temperatures, outdoors). 

Coaxial cartridges, syringes, bags, buckets, drums, pre-dosed kits... adapted to a wide range of applications. manual, semi-automated or automated application depending on your equipment.