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Silicone Sealant
Silicone sealants are an essential part of any toolkit for sealing joints, gaps, and cracks in domestic, commercial, and industrial environments. Found in bathrooms, kitchens, roofing, glazing, and façades, they provide strong adhesion and long-term flexibility, even under exposure to water, UV, or temperature changes. Unlike hybrid polymers or acrylic alternatives, they deliver superior elasticity and reliable durability. For those looking to complete professional or DIY projects, the right choice of sealants ensures both performance and reliability across key applications.
FSi Pyrolastic Fire Resistant Silicone Sealant
One-part, neutral curing silicone for construction joints. Pyrolastic cures at room temperature under the action of atmospheric moisture to give a permanently flexible silicone rubber. Prevention of air leakage - Maintains acoustic performance, Assumed working life of 25 years Highly flexible - Cold smoke seal - Wide range of backing...
Sika Sikasil-825 Silicone Sealant
Single pack, low modulus neutral cure silicone sealant for perimeter, weather and expansion joints – available in white, black, greys, red, brown, buff, beige, magnolia, stone and limestone shades. Adheres to porous and non-porous substrates including uPVC, aluminium, metals, glass, plastics, wood, masonry and natural stone. Certified to...
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...
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...
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,...
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...
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....
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...
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...
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...
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...
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,...
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...
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Flexible, Weather-Resistant Sealants for Every Setting
Silicone sealants are relied upon for high-performance sealing in wet rooms, structural glazing, and construction joints. They offer exceptional resistance to water, UV exposure, and temperature extremes, making them suitable for both internal and external use. Their flexibility allows them to absorb building movement, while neutral-cure options are safer on metals, plastics, and sensitive surfaces. From sanitary silicone in kitchens and bathrooms to high-temperature grades for flues and automotive use, their versatility is unmatched.
As demand grows for long-lasting, low-maintenance finishes, silicone sealants remain the top choice for sealing joints and preventing moisture ingress. They are ideal complements to interior paint when used around window frames, door edges, and tiled areas.
Frequently Asked Questions
Can silicone sealant be used on damp surfaces?
Most silicone sealants require a dry surface to adhere properly. Applying them on damp or wet areas can prevent curing and cause adhesion failure. However, some specialist formulations are designed for damp application, particularly in emergency roof repairs or plumbing tasks. It’s essential to check the product specification to ensure compatibility with the substrate conditions before use.
Is silicone sealant paintable?
In most cases, silicone sealants are not paintable. Paint often peels or cracks when applied over silicone due to its surface chemistry and flexibility. For paintable results, alternative sealants such as MS polymers or acrylic sealants should be considered. If painting is required, choose a sealant specifically labelled as paint-compatible or use a bridging primer where suitable.
What tools are needed for applying silicone sealant?
A good quality caulking gun is essential for consistent application. Additional tools such as masking tape for neat edges, smoothing tools for joint finishing, and cleaning solvents for surface prep will help achieve a professional result. It’s also advisable to wear gloves and work in well-ventilated areas, particularly with high-strength or specialist grades.