BATH SILICONE SEALANT

Bostik Bath is a high-quality white silicone sealant for bathrooms and kitchens. This acetoxy curing silicone sealant offers resistance to UV, water, and household chemicals. Formulated as a mould-resistant bath silicone, it is suitable for sealing baths, showers, sinks, and toilets. With strong adhesion to non-porous surfaces, this versatile bathroom silicone ensures long-lasting, professional results in wet environments.

Bostik Perfect Seal Bath Silicone Sealant 280ml cartridge in white, designed for durable, waterproof sealing of bathroom fixtures like tubs and tiles.
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Technical Data Sheet (437.98 KB)
Colours

White

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Sizes
90ml
280ml
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Features & benefits Downloads & resources How to use FAQs Related products

Features & benefits

Bostik Bath is a high-quality white silicone sealant designed to provide a permanently flexible, durable, and watertight bath seal for bathroom applications. This one-part acetoxy curing silicone sealant offers resistance to UV radiation, weathering, ageing, and water, ensuring long-lasting performance. It is also highly resistant to common household chemicals such as diluted acids, alkalis, soaps, and detergents. Formulated with a fungicide, this bath silicone helps prevent mould growth, making it ideal for wet environments. The sealant remains flexible across a wide temperature range and features a non-sag formulation for easy application on vertical surfaces.

Surface Compatibility 

Bostik Bath silicone sealant offers excellent primerless adhesion to a wide range of non-porous materials, including ceramics, glass, enamel, porcelain, coated wood, painted surfaces, stainless steel, aluminium, and certain rubbers and plastics such as acrylics, polycarbonates, polyester, and rigid PVC. This makes it a versatile bathroom silicone for many sealing applications where strong, elastic bonding is required.

Smart advantages

Mould resistant

100% waterproof

Permanently flexible

Low shrinkage

Non-yellowing

Downloads & resources

Bostik DIY South Africa Seal - Bath Silicone Sealant Technical Data Sheet (437.98 KB)

Technical Data Sheet

Bostik DIY South Africa Seal - Bath Silicone Sealant Safety Data Sheet (86.49 KB)

Safety Data Sheet

How to use

Ensure surfaces are clean, dry and free of loose materials, dust, grease, rust and other contaminants. Use masking tape to get a clean, even sealant line and to eliminate cleaning difficulties on porous surfaces. Remove tape before sealant skins.

90ml Tube  

  • Remove the cap and pierce seal with reverse side of cap.
  • Cut the nozzle to desired bead size and screw onto tube.
  • Apply silicone at a slight angle in a continuous bead to the prepared joint.
  • After use, remove the nozzle, wipe clear and replace the cap firmly. 

280ml Cartridge  

  • Cut the tip off the cartridge and screw on the nozzle.
  • Cut the tip of the nozzle at an angle to achieve the desired bead size.
  • Apply with a caulking gun in a continuous bead to the prepared joint.
  • Remove unwanted silicone immediately.
  • Smooth down after application within 3-5 min before skin formation occurs, by using a flat or rounded tool.
  • Sealant dries to touch in approximately 45 minutes and reaches full cure after approximately 24 hours. 

Applications 

This sanitary bathroom silicone sealant is ideal for sealing around bathroom and kitchen fittings. It suits baths, showers, sinks, and toilets. It provides a clean, white silicone finish. The bath silicone is suitable for general DIY sealing in damp, humid areas. It provides a reliable waterproof seal in high-use spaces.

Limitations 

This silicone sealant is not suitable for alkaline surfaces such as concrete, fibrous cement, plaster, asbestos, or marble. It should not be used on certain metals including mild steel, lead, copper, brass, zinc, or galvanized iron, as corrosion may occur. This bath silicone is not paintable and may discolour when in contact with some organic elastomers such as EPDM, Neoprene, and bituminous materials. 

Not suitable for mirrors as it may damage the reflective backing, or for natural stone surfaces such as marble, granite, and quartzite due to potential staining. It will not adhere to some plastics including polyethylene, polypropylene, and Teflon. 

This bathroom silicone is not suitable for fish tanks due to the presence of a fungicide. Application should also be avoided when relative humidity is below 10%, as this may affect curing performance.

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FAQs

How do I store my silicone?

To maximize the shelf life of an opened silicone cartridge, we recommend that the nozzle be removed and a piece of plastic placed over the cartridge tip after which the nozzle must be screwed back on. A large screw inserted into the nozzle tip also helps to extend the life. Store in a cool environment.

How do I remove cured silicone?

Cured sealant must be removed mechanically with a sharp knife or chemically with Bostik Silicone Stripper. Always test on a small surface first.

Which sealant is the right one for my application?

Our Glue Guide can help you find the best adhesive for your application.

How to clean silicone sealant?

For best results, clean silicone sealant while it is still uncured using a solvent such as turpentine or paraffin and a clean cloth. Once cured, the sealant can only be removed mechanically, for example with a sharp knife, or with a dedicated silicone remover.

How to dissolve silicone sealant

Cured silicone sealant cannot simply be dissolved. It must be removed either mechanically or by using a specialised silicone stripper designed to break down the material.

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