Silicone Sealants

Our structural silicone sealants and sanitary silicone sealant systems are designed to provide:

• Excellent movement capability for expansion joints and façade systems

• Strong adhesion to porous substrates and non-porous surfaces

• UV and weathering-resistant performance

• Excellent resistance to moisture, cleaning agents, and temperature changes

• Long service life once fully cured

• Reliable performance in high-humidity environments

• Compatibility with glass, metals and construction materials

Cure times vary by product and site conditions. Refer to the individual product datasheet for full curing information. Once cured, the cured silicone sealant remains flexible and durable for long-term performance.

Correct installation is essential for structural silicone sealant and sanitary silicone sealant systems.

Joint Preparation

• Use correct joint dimensions

• Install backing materials where required

• Avoid three-sided adhesion

• Use compatible backing rods or preformed sealants when specified

Appropriate backing materials, such as closed-cell or open-cell backer rods may be used where specified. Always confirm compatibility with ARBO Technical Services.

Application Gunning

Apply the silicone sealant using professional application gunning equipment:

• Cut the nozzle to the correct bead size

• Apply steady, even pressure

• Ensure full contact with both sides of the joint

Tool the sealant immediately before skin formation to create a smooth finish.

Selecting the correct silicone sealant ensures long-term performance and compliance. ARBO® provides comprehensive support, including technical guidance and ongoing customer service throughout the project lifecycle.

If you can’t find the right sealant, contact a member of our team, and they can help you find the right solution.

Sanitary Uses
ARBOSIL 1081 and ARBOSIL HM are ideal for bathrooms and kitchens. These sanitary silicone sealant and HM sealant products provide mould resistance and reliable sealing in high humidity conditions.

Sensitive Substrates
ARBOSIL XL1099 S is a non staining silicone sealant that helps prevent staining on marble, granite, and precast concrete.

Lead Work
ARBO Lead Seal S offers solvent-free, flexible sealing for lead flashings

For curtain walling, expansion joints, roofing, and perimeter sealing, choose ARBOSIL 1090, HDLMS, or 1096 S, depending on movement and substrate requirements.

ARBO® structural silicone sealants are specifically designed for structural glazing applications where system compatibility is critical to long-term durability and performance. In these systems, every element, including the sealant, secondary sealant, gaskets, and substrates, must be compatible to prevent fluid migration, which can affect the mechanical properties and adhesion of structural sealants and lead to discolouration or failure of the insulated glass unit.

Using non-approved gaskets or incompatible materials can result in the disintegration of the insulated glass unit due to fluid or plasticiser migration. Closed-cell PE or open-cell backer rods are compatible with structural glazing applications.

If unsure, contact our technical team for expert specification guidance.

• High movement capability

• Long-term durability

• Excellent UV and weather resistance

• Wide substrate compatibility

• Neutral and acetoxy cure options

• Many ARBO silicone sealants comply with relevant standards such as BS EN ISO 11600 and BS 5889. Refer to individual product datasheets for specific classifications.

• Suitable for commercial and residential projects

• Suitable for structural and weatherseal applications. Many products offer excellent adhesion to common construction materials such as glass and aluminium; however, primer requirements should be confirmed via product datasheets or testing.

• Brilliant White Silirub N is a general-purpose, low-modulus, neutral-cure silicone sealant with very fast skinning and final cure.

Many ARBO sealants comply with relevant British Standards (BS EN ISO 11600, BS 5889) and offer additional assurances for use in construction. If you need a silicone sealant that complies with specific standards, speak to our team and they can suggest the best product for you.

Not sure which silicone sealant is right for your project?

Our technical team can advise on substrate compatibility, joint design, adhesion, and performance requirements.

Important Information

The information is given in good faith and based on results gained from experience and tests. However, all recommendations or suggestions are made without guarantee since the conditions of use are beyond our control.

It is the user and specifier’s responsibility to ensure ARBO product is suitable for the intended use: consult ARBO Technical Services for specific advice. Goods are supplied subject to the Company’s terms and conditions of sales, a copy of which is available on request.