Description
Arbosil HM Silicone Sealant – High Modulus Sanitary Silicone
Arbosil HM silicone sealant is a professional high modulus sanitary silicone designed for bathrooms, kitchens and wet areas. This mould-resistant silicone provides a durable flexible seal around baths, showers, sinks, worktops and sanitary fittings, making it ideal for both domestic and commercial applications.
Where to Use This Sanitary Silicone Sealant
This sanitary silicone sealant is ideal for:
- Baths, showers and shower trays
- Sinks, basins and worktops
- Kitchen splashbacks and laminates
- Wet rooms and changing facilities
Why Choose Arbosil HM Sealant
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Rapid Cure – Fast skinning and curing time for efficient application
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Mould & Mildew Protection – Contains a fungicide to help prevent staining and deterioration
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Versatile – Bonds to a wide range of common construction substrates
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Durable – Exceptional UV resistance and a service life of 25+ years
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Extensive Colour Range – White, Black, Translucent, Aluminium, Jasmine, and Manhattan for seamless colour matching
Sanitary Silicone vs Neutral Cure Silicone
High modulus acetoxy silicones like Arbosil HM are ideal for sanitary applications due to their fast cure and strong adhesion.
Neutral cure silicones are better suited for glazing and sensitive substrates, while sanitary silicones are specifically formulated to resist mould and mildew in bathrooms and kitchens.
Typical Applications
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Sealing around sanitary fittings (baths, showers, basins, urinals)
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Edges of laminates and worktops in kitchens or utility areas
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General sealing in high-humidity areas such as bathrooms, wet rooms, and changing facilities
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Suitable for both internal and external joints
For external glazing applications, see Arbosil 1096 neutral cure silicone
Technical Overview
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Material: Silicone
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Skin Time (20 °C / 65% RH): 10–20 min
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Cure Rate: ~2 mm / 24 hrs
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Service Temperature: –50 °C to +150 °C
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Movement Accommodation: 25% (butt), 50% (lap)
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Chemical Resistance: Resists most alkalis and dilute acids
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UV Resistance: Very good
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Service Life: 25 years+
Note: Not recommended for overpainting, direct use on most metals, or against natural stone. For these applications, consult ARBO Technical Services. For flexible structural bonding, explore hybrid sealants such as Arbobond Pro.
Find out more with our Arbo Sealants Guide here
