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Sealants
Repair and gap filling sealants, by design, are ultra-handy for project managers and builders across the UK. With excellent precision, sealants can be applied to a wide range of substrates and surfaces to fix minor defaults, cracks, gaps and holes, or act as part of a major renovation and repair project toward the finishing stages of flooring, walls and ceilings. Click here for more info.
Fosroc Nitoseal MS60
One part, low modulus sealant based on hybrid silyl modified polyether (“MS”) technology. Suitable for use for sealing joints in concrete, brickwork, blockwork, perimeter sealing around doors and windows, and non-trafficked floor joints. Applied to joints between 5mm and 35mm wide For joint widths exceeding 35mm, please contact Rawlins...
Mapei Mapeflex PU45 FT Sealant
Mapei Mapeflex PU45 FT Sealant is a paintable, rapid, high modulus polyurethane sealant and adhesive, specially developed for sealing expansion and distribution joints in horizontal and vertical surfaces, including those which are subject to occasional chemical attack by hydrocarbons. From the 24th August 2023, adequate training is required...
Sikaflex EBT+
Sikaflex EBT+ (box of 12x300ml cartridges) is a multi-purpose 1-part, elastic, polyurethane adhesive, sealant and filler. It bonds to all common building materials, is permanently elastic and has excellent grab and gap filling properties. Bonds to concrete, brick, mortar, wood, metals, glass, resins and most plastics. Features and Benefits...
Sikaflex 221
Sikaflex 221 is a high quality multi-purpose non-sag 1 component polyurethane sealant that cures on exposure to atmospheric humidity to form a durable elastomer. 1 component formulation - Elastic - Low odour - Resistant to ageing Non-corrosive - Can be overpainted - Can be sanded Bonds well to a wide variety of substrates NSF approved...
Sikasil WS 605 S
Sikasil WS 605 S (pack of 20x 600cc sausages) is a durable, neutral-curing silicone sealant with a high movement capability and excellent adhesion to a wide range of substrates. It can be used for weatherproofing and sealing applications where durability under severe conditions is required. It is particularly suited as a weather seal for...
Sika Plastix 22A Premium Grade Silicone Sealant
Sika Plastix 22A Premium Grade Silicone Sealant (Box of 12x 300ml cartridges) is a low modulus, neutral curing silicone sealant suitable for many construction and industrial applications but particularly suited for all glazing, façade and roofline applications. Features and Benefits Excellent primerless adhesion to all common building...
Tecnic Joint Backer Rod
Tecnic Joint Backer Rod, a non absorbent, compressible grey closed cell polyethylene (P.E) foam backup material for reducing the depth of joints in construction/glazing use and creating a backstop to allow proper sealant tooling. Priced per metre (40mm and 50mm sold in 2m lengths) Quick and easy to apply Reduces sealant usage Improves...
Fosroc Nitoseal MS100
Fosroc Nitoseal MS100 is a one-part, primerless*, damp tolerant, non-staining façade sealant producing a tough, durable elastomeric seal. Uses: Formulated for stain-free sealing of joints in and around concrete, brick, masonry, pre-cast panels, stone cladding, windows, doors and fibre cement sheeting. Suitable for use over a wide range of...
Sikaflex 11 FC+
Sikaflex 11 FC+ (available as a pack of 12 x 300cc or 20 x 600cc cartridges) is a 1-part elastic joint sealant and multipurpose adhesive based on polyurethane that is suitable for indoor and outdoor applications. 1-part,ready to use Flexible and elastic Solvent free and odorless Very low emission Sealant: Bubble-free curing Very...
Sikaflex AT Connection
Sikaflex AT Connection (available in packs of 20 x 600cc sausages) is a universal construction sealant for connection joints that is a one part, solvent based, PU hybrid that is UV resistant and permanently elastic. Movement capability 25% (ISO 9047) - Silicone free and over-paintable Good weathering and aging resistance - Good adhesion...
Sika Tooling Agent N
Sika Tooling Agent N is a water-based, solvent-free tooling agent for Sika's elastic sealants and adhesives. Tooling agent to create smooth finishes with Sikaflex sealants pH neutral Compatible with common surfaces No washing-out or etching of fresh applied sealants or adhesives Professional use only More Information Delivery Info
Sikasil Pool
Sikasil Pool (box of 12 x 300ml cartridges) is a one part neutral curing silicone sealant for use in swimming pools and permanently wet areas. It is suitable for joints in and around swimming pools, areas under permanent water immersion and frequently wet areas, such as shower rooms in sports halls or leisure facilities, between ceramics,...
Illbruck GS360 Building Silicone
Illbruck GS360 Building Silicone is a high performance, acetoxy, construction silicone with excellent adhesion, long-term flexibility and weatherproof performance and contains fungicide. GS360 is suitable for a wide range of sealing applications, such as: perimeter sealing of door and window frames, sealing and draught proofing of glass and...
Cromar Alphachem Multi-purpose & Sanitary Silicone
Cromar Alpha Chem Multi-Purpose & Sanitary Silicone is a high performance, quick curing, acetoxy curing silicone for general sealing, sanitary and glazing applications. Suitable for gap sealing and internal/external weather proofing application. Provides a permanently water tight flexible seal and offer excellent adhesion properties on...
Cromar AlphaChem Silicone 800LMN+
Cromar Silicone 800LMN+ is an elastic single-component silicone sealant for indoor and outdoor use, with 25% maximum movement tolerance. Single-component, elastic silicone-based sealant for indoor & outdoor use Aging and weather-resistant, high UV resistance Compatible with paints, high adhesion to metals and many plastics, compatible...
Sika Sanisil Sanitary Silicone
Sika Sanisil Sanitary Silicone is an acetoxy cure silicone sealant that cures quickly to provide a permanently flexible, high strength waterproof seal. This product has been specifically designed for sanitary applications. Features and Benefits Fungicidal formula - will not discolour on aging even in humid/damp conditions. Permanently...
Cromar Alphachem Universal Silicone
Cromar AlphaChem Universal Silicone is a high performance, quick curing, universal silicone for general sealing, glazing and sanitary applications. Provides a permanently water tight flexible seal Offers excellent adhesion properties on most common nonporous building materials Ideal for sockets and switches, windows and doors, baths,...
Cromar Alphachem Building Trades Silicone
Cromar Alphachem Building Trades Silicone is a premium, neutral cure silicone sealant, exclusively created for weather sealing and glazing applications. For expansion and construction joints and perimeter pointing. Suitable for adhesion to a wide range of porous and non‐porous substrates Forms a flexible UV, water and weatherproof seal...
Cromar Alphachem Pure Anti Mould Silicone
Cromar Alphachem Pure Anti Mould Silicone is a high quality, waterproof, superior antimould silicone suitable for most sanitary sealing and areas of high humidity such as shower cabinets, tiles, bath tubs and sinks. Fast curing, 100% silicone, with a 10 year guarantee to stop black mould growth Resistant to temperature extremes and aging,...
Cromar AlphaChem Premium Sanitary Silicone 808
AlphaChem Premium Sanitary Silicone 808 is ideal for sealing around sanitary plastics, ceramics, glass, melamine, laminates, anodised aluminium and lacquered metals. Waterproof Premium sanitary grade Added powerful anti-fungal additive to prevent unsightly mould growth Specifically designed to work in areas of high humidity Do not...
Mapei Mapeflex MS 45
One-component flexible, thixotropic, quick- hardening sililated polymer-based hybrid sealant and adhesive with a high modulus of elasticity. Also suitable for damp substrates. For professional use only Sealing expansion, fillet and distribution joints subject to movements of up to 20% of the average width of the joint When applied at a...
Mapei Mapesil 300°C
A flexible, acetic-reticulation silicone sealant characterised by its resistance to high temperatures. Suitable for flexible seals which resist continuous temperatures up to +300°C. Specifically developed to seal flues, boilers, industrial and domestic ovens, pipe-work and conduits subjected to high temperatures when in service. Flexible seals...
Mapei Mapesil AC
An acetic-crosslinking silicone sealant suitable for sealing glass, ceramic, and anodised aluminium. After first having used a bonding enhancer, MAPESIL AC can also be used on concrete, wood, metal, painted surfaces, plastic and rubber. Mapesil AC is used for: Sealing expansion joints of ± 25% expansion of the initial size, according to the...
Mapei Mapesil LM
A solvent-free sealant with a low modulus of elasticity specifically formulated for sealing all materials sensitive to acids and plasticising agents, marble, granite, sandstone and quartz due to its chemical nature which deters surface bleeding or the migration of plasticising agents which would otherwise stain the substrate. Forms an...
Mapei Mapesil BM
A solvent-free, neutral silicone sealant with a low modulus of elasticity, specific for sealing fillet joints between tinwork accessories and layers of waterproofing material. It is particularly recommended for metals normally used on roofs and flat roofs such as steel, zinc and pre-painted sheet, anodised and pre-painted aluminium and copper....
Mapei Mapesil Z Plus
Used to from waterproof seals and joints between construction elements in the building, mechanical, naval, automobile and industrial sectors, including when elements are permanently exposed to damp. After polymerisation has taken place, it forms a perfect, flexible seal which bonds well to glass, ceramic and painted metal surfaces and which is...
Cromar AlphaChem The Business Hybrid Polymer
Cromar AlphaChem The Business is a durable, flexible, universal hybrid sealant/adhesive that sticks and seals a wide range of surfaces to one another - suitable for almost any bonding and sealing applications. Nail replacement adhesive for both internal and external use Can be used in all weather conditions - Excellent adhesion even on wet...
CLEARANCE - Sikaflex AT Connection - White 600ml
Sikaflex AT Connection (available in packs of 20 x 600cc sausages) is a universal construction sealant for connection joints that is a one part, solvent based, PU hybrid that is UV resistant and permanently elastic. Movement capability 25% (ISO 9047) - Silicone free and over-paintable Good weathering and aging resistance - Good adhesion...
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What are Sealants and How Do They Work?
Sealants are essential products used in various industries for sealing gaps, cracks, and joints in surfaces to prevent the intrusion of elements like water, air, dust, and chemicals. By creating an impermeable barrier, they protect against corrosion, structural damage, and deterioration. Unlike adhesives, which primarily bond surfaces together, sealants are designed to maintain flexibility and accommodate movement, making them ideal for use in dynamic environments where materials expand and contract. Their versatility comes from a range of formulations, allowing them to be adapted for specific uses and environments.
Types of Sealants and Their Applications
Different types of sealants are formulated to meet the demands of various applications:
Silicone Sealants
Silicone sealants are highly flexible and durable, making them suitable for a wide range of applications. They offer excellent resistance to temperature extremes, UV light, and moisture, making them ideal for both indoor and outdoor use. Commonly used for sealing around windows, doors, and sanitary fittings, they remain elastic over time, accommodating the natural movement of materials. Their waterproof properties make them particularly useful in bathrooms, kitchens, and other wet areas.
Polyurethane Sealants
Known for their strong adhesion and toughness, polyurethane sealants are often used in construction and automotive industries. They provide a robust bond that can withstand mechanical stress and vibrations, making them ideal for sealing joints in concrete, masonry, and metal structures. Polyurethane sealants are also resistant to abrasion, chemicals, and weathering, which makes them suitable for sealing expansion joints in roads, bridges, and other infrastructure projects.
Acrylic Sealants
Acrylic sealants are often used for interior applications where paintability and ease of use are important. They provide a smooth finish that can be painted over once cured, blending seamlessly with surrounding surfaces. Acrylic sealants are commonly used for caulking around doors, windows, and baseboards. Although they have less flexibility compared to silicone and polyurethane, they are cost-effective and suitable for areas with minimal movement.
Hybrid Sealants
These advanced sealants combine the properties of different sealant types to offer enhanced performance. Hybrid sealants provide strong adhesion, flexibility, and resistance to UV rays, chemicals, and weathering. They can be used in a wide range of applications, from sealing glass and metal in construction to providing flexible joints in flooring and roofing systems. Their versatility makes them suitable for both indoor and outdoor use, where a durable and long-lasting seal is required.
Industries and Uses
Sealants are integral to numerous industries, each with specific demands for performance and durability:
Construction
In construction, sealants are vital for creating watertight and airtight seals in various parts of a building. They are used in joints between walls, floors, ceilings, and roofing materials to prevent water ingress, control air leakage, and improve energy efficiency. Sealants also help in reducing sound transmission, providing a quieter indoor environment. For masonry work, sealants protect against moisture infiltration, which can cause cracking and damage over time. In infrastructure projects like bridges, tunnels, and pavements, they accommodate movement caused by thermal expansion, traffic loads, and seismic activity.
Automotive
The automotive industry relies on sealants for ensuring vehicle integrity and safety. They are used in body panels, windshields, and seams to prevent water leaks, air infiltration, and noise transmission. Sealants also contribute to vehicle aerodynamics and protection against rust and corrosion. Under the hood, high-temperature sealants are used in engine gaskets, oil pans, and exhaust systems to prevent leaks and withstand exposure to oils, fuels, and high heat.
Marine and Offshore
Marine environments are harsh, with constant exposure to saltwater, UV radiation, and fluctuating temperatures. Marine-grade sealants are formulated to resist these conditions, providing waterproofing and corrosion resistance for boats, ships, and offshore platforms. They are used to seal hulls, decks, and superstructures, ensuring structural integrity and preventing water ingress. In offshore oil rigs and marine infrastructure, sealants protect against the ingress of contaminants, safeguarding equipment and personnel.
Industrial
In industrial settings, sealants play a crucial role in maintaining the efficiency and safety of machinery and equipment. They are used in pipe threads, valves, and tanks to prevent leaks and protect against exposure to chemicals, oils, and gases. Sealants with high chemical resistance and heat tolerance are essential in manufacturing plants, chemical processing facilities, and food processing industries to ensure safe and hygienic operations. Additionally, they provide vibration dampening and shock absorption in heavy machinery, reducing wear and tear.
Key Benefits of Using Sealants
Sealants offer several benefits that make them indispensable in construction, repair, and maintenance:
Waterproofing
Sealants create a watertight barrier that prevents water penetration, protecting surfaces from damage and corrosion. This is especially important in areas exposed to moisture, such as bathrooms, kitchens, roofing, and exterior walls.
Energy Efficiency
By sealing gaps and cracks, sealants reduce air leakage, contributing to better insulation and energy efficiency. This helps maintain indoor temperatures, reducing heating and cooling costs.
Noise Reduction
Sealants block sound transmission through walls, windows, and doors, providing a quieter indoor environment. This is particularly useful in residential buildings, offices, and industrial settings.
Chemical Resistance
Some sealants are formulated to resist exposure to chemicals, oils, and solvents, making them suitable for use in industrial and marine environments where protection against chemical damage is crucial.
Flexibility and Movement Accommodation
Sealants maintain their flexibility, allowing them to absorb and accommodate movement in structures due to temperature changes, vibrations, and settling. This prevents cracking and damage over time.
Durability and Longevity
High-quality sealants offer long-lasting protection against environmental factors, reducing the need for frequent repairs and maintenance.
Choosing the Right Sealant for Your Project
When selecting a sealant, it's important to consider the specific requirements of your project:
Material Compatibility
Ensure the sealant is suitable for the materials being sealed, such as concrete, metal, glass, wood, or plastic. Some sealants are formulated for specific substrates, offering better adhesion and performance.
Environmental Conditions
Consider the environment where the sealant will be applied. For outdoor applications, choose a sealant that offers UV resistance, weatherproofing, and resistance to temperature extremes. For indoor use, low-odour and paintable options may be more appropriate.
Movement and Flexibility
In areas where joints or substrates are subject to movement, such as expansion joints, windows, and doors, a flexible sealant is necessary to accommodate movement without cracking.
Resistance Properties
For applications exposed to chemicals, heat, or moisture, select a sealant with the necessary resistance properties to ensure long-term performance. For example, marine-grade sealants provide exceptional resistance to saltwater and UV radiation.