Mastic Sealant

A mastic sealant is a type of flexible, liquid, or paste-like material used to seal joints and gaps in various construction applications.

They are known for their ability to remain flexible after curing, allowing them to accommodate movement and expansion in the materials they seal.

Mastic Sealant

Mastic Sealants Product Range

Explore our mastic sealants product range to help with your next construction, automotive or brickwork project. 

Features and Benefits

Versatility Across Materials

Mastic sealants exhibit versatility by working effectively with a wide range of materials, including aluminium, glass, marble, wood, plastics, ceramics, and steel. This versatility makes them applicable in various construction and bonding scenarios, accommodating different material types commonly encountered in outdoor projects.

Dual Functionality - Sealing and Bonding

Mastic sealants serve a dual purpose by combining both sealing and bonding functions. This means they not only create a secure seal to prevent substances like water from passing through joints and gaps but also form strong bonds between different materials. For instance, they can effectively bond wall tiles with porcelain floor tiles or other types, ensuring a durable and leak-resistant connection.

Corrosion Resistance in Metal Units

Mastic sealants are widely favoured in metal units due to their natural corrosion resistance. When applied to metal surfaces, these sealants help protect against rust and other forms of corrosion, contributing to the longevity and durability of the metal components. This corrosion resistance is especially valuable in outdoor or humid environments where metals are prone to degrade over time.

Suitability for Outdoor Projects

The suitability of mastic sealants for outdoor projects is attributed to their resistance to various environmental factors. They can withstand temperature fluctuations, exposure to water, and the damaging effects of UV rays. This makes them reliable choices for sealing and bonding applications in exterior settings, where materials are exposed to diverse and challenging conditions.

Direct Application Without Primer

One notable advantage of mastic sealants is that they can be applied directly to surfaces without the need for a primer. This simplifies the application process and reduces the preparation steps required. The direct application capability enhances the convenience and efficiency of using mastic sealants in various construction and bonding projects.

Mastic Sealants for Construction

Mastic sealants are widely used in the construction industry for sealing joints, gaps, and cracks in buildings. They are used in applications such as sealing windows, doors, curtain walls, expansion joints, concrete joints, and roofing systems.

Mastic Sealants for Closed-Joint Sealing and Bedding Applications

Mastic sealants are commonly used for closed-joint sealing and bedding applications in construction. These applications involve creating a seal or bed of material between two surfaces to prevent the ingress of water, air, or other substances.

Mastic Sealants for Automobiles and Containers

Mastic sealants play a crucial role in the automotive and container industries, providing effective sealing and bonding solutions for various applications.

Other Uses

Mastic sealants can be used in various applications across different industries. Here are some other areas where these all purpose sealants are commonly used:

Manufacturing: Mastic sealants are used in manufacturing processes for sealing joints and connections in various equipment and machinery. They help prevent leaks, vibrations, and noise transmission in applications such as HVAC systems, electrical enclosures, and industrial piping.

Marine: Mastic sealants play a crucial role in marine applications for sealing joints and gaps that are exposed to water and harsh marine conditions. They are used for sealing hulls, decks, windows, hatches, and other areas where water ingress needs to be prevented.

Plumbing and HVAC: Mastic sealants are commonly used in plumbing and HVAC systems for sealing pipe joints, ductwork, and other connections. They help ensure airtightness, prevent leaks, and improve energy efficiency.

Electrical: Mastic sealants are used in electrical applications for insulating and sealing electrical connections, junction boxes, and cable entries. They protect against moisture, dust, and other environmental factors.

DIY and Home Improvement: Mastic sealants are widely used in DIY projects and home improvement tasks. They can be used for sealing gaps around windows and doors, filling cracks in walls, repairing leaks in plumbing fixtures, and various other sealing and bonding applications.

It's important to select the appropriate type of mastic sealant based on the specific requirements of the project, such as the substrate material, expected movement, environmental conditions, and desired lifespan. Proper surface preparation and application techniques are essential for achieving optimal sealing performance.

Mastic Sealants FAQs

Below are some of our most frequently asked questions from customers.

How long does a mastic sealant last? 

In general, mastic sealants are designed to provide long-lasting performance for more than 5 years. The lifespan of mastic sealants can vary depending on several factors, including the type of sealant, application conditions, exposure to elements, and proper installation. 

Are mastic sealants waterproof? 

Mastic sealants are designed to be waterproof or water-resistant. The primary function of these sealants is to create a barrier that prevents the infiltration of water and other liquids. Mastic sealants are commonly used in construction to seal gaps, joints, and seams in various building materials, protecting against water penetration.

Are mastic sealants resistant to weathering and UV radiation?

Yes, mastic sealants are designed to be resistant to weathering and UV radiation. They are formulated to withstand exposure to sunlight, extreme temperatures, and other environmental factors. The sealants' resistance to weathering and UV radiation helps them maintain their performance and integrity over time, preventing degradation, discolouration, and loss of sealing effectiveness.

This quality makes mastic sealants suitable for outdoor applications where they are exposed to the elements, such as sealing joints in windows, doors, roofing systems, and other exterior structures.

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CARLISLE® Construction Materials Ltd.

Adshead Ratcliffe & Co Ltd., United Kingdom
Derby Road, Belper, Derbyshire, DE56 1WJ
T +44 (0)1773 826661
F +44 (0)1773 821215

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