Elastic sealants and adhesives

Elastic sealants are used by all professionals working in the building industry for sealing joints, cracks and gaps. A deep knowledge of the needs of its final users enables Mapei to cater a wide range of sealants: silicon, epoxy, polyurethane sealants and more to meet all kinds of site conditions. Mapei’s range of polyurethane sealants and other range are highly durable, suitable for every type of technical and application requirement with cutting-edge performance, meaning you can rely on assured performance properties and on results that maintain their reliability over the years.

Products in the spotlight

MAPESIL AC

MAPESIL AC

Pure, mould-resistant, acetic silicone sealant with BioBlock ® technology for movements up to 25%.
MAPESIL LM

MAPESIL LM

Neutral silicone mould-resistant sealant with BioBlock ® technology for stone for movements up to 25%.
MAPEFLEX PU50 SL

MAPEFLEX PU50 SL

Paintable, castable polyurethane sealant with a low modulus of elasticity for movements up to 25%. TECHNICAL DATA: Movement in service:…
MAPEFLEX MS CRYSTAL

MAPEFLEX MS CRYSTAL

Elastic high modulus, flexible, crystal clear, paintable, hybrid sealant and adhesive. Also suitable for damp surfaces.

A guaranteed seal for every building

With this line we offer elastic sealants of every kind (acrylic, hybrid, neutral silicone, acetic silicon, epoxy and polyurethane sealants) for grouting, filling, waterproofing and closing joints and cracks, chemical anchors for fixing and anchoring metal bars in building materials, as well as deformable adhesives for bonding, assembling and joining similar or different materials and self-expanding foams for filling, sealing and insulating work.

16.Progettazione

DESIGN

The quality of a building starts with the care taken over the construction details.
    

11.Gamma

RANGE

What Mapei offers is a specialised range  with cutting-edge performance.

13.Innovazione

INNOVATION

The expertise and professionalism of our laboratories are always at the service of the market.

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One line to construct
projects all around the world

Category icon RESIDENTIAL BUILDINGS

Benedetto Marcello Condominium

Milano, Italy

Concrete restoration systems

Category icon INFRASTRUCTURES

Guglielmo Marconi Airport

Bologna, Italy

Admixtures for concrete

Category icon INFRASTRUCTURES

Water canal

Senago, Italy

Waterproofing systems

Category icon PUBLIC BUILDINGS AND PLACES

Gino Valle Square

Milano, Italy

Installation of floors

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Frequently Asked Questions (FAQ)

Refer to our FAQ page for more information.


Silicone sealant contains inorganic substance whereas polyurethane sealant is organic in its composition. Silicone sealants are easy to extrude and smooth off, resistant to ageing, high service temperatures and chemicals. They can adhere to building materials such as glass, ceramic and aluminium. They are often used for sealing expansion joints in wall and floor coverings of ceramic and cement that are not subject to heavy abrasion, plumbing fixtures and sanitary ware such as bathtubs, basins, showers, expansion joints in swimming pools, around doors, windows, utility cable, etc.

Polyurethane sealants on the other hand, can adhere to a wide range of building materials such as cement-based products, bricks, steel, aluminium, general pre-painted surfaces, glass, wood-based materials, gypsum, ceramics, plastics, etc. They have high mechanical and wear resistance, resistant to chemical and corrosion, are highly adhesive and paintable with elastic paint.

Polyurethane sealants are useful as a heavy-duty adhesive and sealant. It is suitable for industrial floors subject to vehicular traffic, concrete floors and walls, sealing pipe-work systems and cables, sealing general fillet joints, etc. It can also be used for constructing and finishing building works such as skirting boards, bathroom fittings, window sills, etc.

 


The drying process may vary. It may cure or set after 24 hours for internal application but when applying externally with a temperature of ±30⁰C, it may cure or set within a day. The rule of thumb is to touch the surface of the sealant to ensure that it is not tacky which indicates that the sealant is set.

 


Mapei have a polyurethane sealant that can adhere well to wood and wood-based materials. As for silicone sealants in the Mapei range, it is possible to use on wood, though it is required to apply an additional primer such as Primer FD to act as a bonding enhancer before applying silicone sealant. Primer FD can adhere well on concrete, wood, metal, painted surfaces, plastic and rubber.

 


Mould and algae will form when sealants are exposed to conditions of damp and high temperature. Certain elastic sealants may be able to delay mould and algae formation due to the presence of biocides that oppose the formation of efflorescence. Mapesil AC is formulated with biocides and BioBlock technology which extends mould/algae protection for a longer period of time, especially when correct, periodic maintenance is carried out on the sealant.

 

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