Polymer mastic: the sealing and bonding solution

What is a polymer sealant?

Le polymer masticalso known as MS polymer putty or hybrid sealantis a single-component adhesive solution based on silane-modified polymers (SM)which combines the advantages of silicone sealant and polyurethane sealant.
It hardens by reacting with the humidity in the air to form a elastic, durable, multi-substrate sealwithout shrinkage or bubbles.

It's one of the most versatile products on the market today, capable of providing both a bonding and sealing functionin extreme conditions. It is particularly popular in the construction, industry, transport, energy, maintenance, etc. and mobility.

Advantages of polymer sealant

Le polymer mastic offers unrivalled versatilitycombined with a simplified implementation and high technical performance :

Excellent adhesion without primer on most materials: concrete, glass, wood, aluminium, steel, PVC, composites, etc.

Durable elasticity (up to 25 % of movement) without cracking or shrinking

Can be used indoors and outdoorseven on damp surfaces

Isocyanate-free, solvent-free, silicone-free : safe application + regulatory compliance

Paintable after dryingcompatible with many water-based paints

Very low VOC emissions EC1 Plus or A+ certified, depending on the product

UV, weather, thermal shock and vibration resistance

Good mechanical strength (shearing, peeling, tearing)

This is the ideal solution for complex sites, sensitive materials or standardised environments.

Typical applications for polymer sealant

Building and finishing sector

Watertightness and bonding of façade joints, joinery, cladding, etc.

Gluing skirting boards, thresholds, partitions and decorative elements

Making joints between different materials (wood + aluminium, concrete + PVC...)

Sanitary seal in kitchens and wet areas (fungicide versions available)

General industry and maintenance

Assembly of parts or panels in industrial environments

Sealing of ducts, conduits, cabinets and boxes

Repair or rapid maintenance of equipment exposed to mechanical or chemical attack

Automotive, rail, marine and transport

Structural sealing of body panels

Flexible bonding of glazing, bodywork components and accessories

Non-staining polymer mastic for paints, coatings or fragile surfaces

Stable behaviour to vibrations, projections and differential expansion

Specific applications and sensitive environments

HQE-rated premises, medical or food zones

Working near children, animals or in occupied areas

Industrial sites subject to stricter HSE requirements

Types of polymer sealant

Standard multi-purpose polymer sealant

Versatile for bonding + sealing
Very good adhesion without primer
Paintable, solvent-free, odourless

Polymer facade sealant or expansion joint

UV, moisture and ageing resistance
Conformability EN15651-1 (front), EN15651-4 (floors)
Long-lasting elasticity and excellent durability

Transparent polymer putty

Discreet, aesthetic application
Long-lasting transparency after drying
Ideal for glazing, visible assemblies or decorative elements

Special sanitary polymer mastic

Fungicide formulation (anti-mould)
Resistant to standing moisture and detergents
Suitable for kitchens, bathrooms and wet areas

Flame-retardant polymer mastic

Compliance with standards EN45545, UL94, FAR 25
Low flame spread, low smoke development
Recommended for transport, tunnels and public buildings

Certifications and quality commitments

All the polymer sealants offered by ADDEV Materials are available with certifications according to use:

EN15651 (Building) : Façade, Floors, Sanitary facilities

EN45545 (rail), UL94 V-0, FAR 25

EMICODE label EC1+, A+, ISEGA according to formulation

REACH / RoHS compliant / isocyanate-free / solvent-free

Technical Data Sheets (TDS), Safety Data Sheets (SDS), certificates available

We select our sealants from leading manufacturers (Bostik, Sika, 3M) or develop solutions based on specifications specific to your sector.

Why choose ADDEV Materials for your polyurethane sealants?

ADDEV Materials offers you complete range of polymer sealantscombined with personalised support:

Large stock of single- and two-component polymer sealants

Technical advice on best formulation according to substrate, temperature, standard

Suitable packaging to suit your needs: cartridges, bags, buckets, drums, etc.

Adhesion, ageing and paint compatibility tests on request

Compatible references automation or manual installation

Our mission: save you timeThis means you can optimise your production processes, secure your assemblies and comply with your standards and environmental requirements, while optimising your installation costs.

Need advice or a quote?

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

Our strategic suppliers of polymer sealants

FAQ - Polymer putty

What is a polymer sealant?

It's a putty single-component based on silane-modified (SM) polymers, which combines sealing and bondingwith a multi-substrate adhesiona lasting elasticity and a formulation solvent- and isocyanate-free.

What is the difference between a polymer sealant and a PU sealant?

Le polymer mastic is isocyanate-free, healthier to use, odourlesswith improved paint compatibility. It offers better stability over time (no withdrawal) and is more environmentally friendly.

Can polymer mastic be painted?

Yes. The majority of polymer sealants can be painted after hardeningThe paint can be applied with water-based or acrylic paints. It is advisable to carry out a test beforehand, depending on the paint used.

Can polymer mastic be used outdoors?

Yes. It's very resistant to UV, weather, humidity, freeze/thawand can even be applied to slightly damp surfaceThis makes it an excellent choice for outdoor work.

Will polymer sealant work on all materials?

Yes, it adheres to most surfaces without primers: concrete, metal, wood, aluminium, PVC, plastic, glass, ceramics... including on dissimilar materials.