BOSTIK Pro-Sealant S29 Acetoxy Silicone Sealant, Clear, 310ml
Pros
- Formulated for glazing and frame joints exposed to high humidity
- Fast-curing acetoxy cure gives a quick, durable seal
- Clear finish blends in around windows, mirrors and frames
Cons
- Acetoxy cure gives off a vinegar-like odour while curing
How it compares in Adhesives & Sealants
We list 42 adhesives & sealants products, priced from £3.47 to £47.95. At £9.99 this one is the 26th cheapest of them — 16 cost more. The average across the subcategory is £10.44 and the midpoint is £8.96, so it lands almost exactly on the average.
Its 4.5-star score sits 0.06 below the adhesives & sealants average of 4.56, with 25 of the 42 rated higher. Its 380 Amazon reviews make it the 39th most-reviewed here, against a subcategory average of 2,868.
Price position in Adhesives & Sealants
Splitting the subcategory into three price bands puts this product in the Mid-range band (£6.99–£10.21), which holds 12 of 36 products and averages £8.81 at 4.56 stars.
| Band | Range | Products | Average price | Average rating |
|---|---|---|---|---|
| Budget | £3.50–£6.50 | 12 | £5.56 | 4.57 |
| Mid-rangeThis one | £6.99–£10.21 | 12 | £8.81 | 4.56 |
| Premium | £10.54–£52.00 | 12 | £16.77 | 4.57 |
About this product
The BOSTIK Pro-Sealant S29 Acetoxy Silicone Sealant offers a reliable solution for sealing joints within your home. This clear sealant is ideal for use on internal projects, particularly in areas susceptible to high humidity such as bathrooms and kitchens, where it provides excellent protection against mould and black spot thanks to its powerful fungicide agent. It’s formulated with a low modulus, high elastic silicone, ensuring a fast skinning time and a durable, highly elastic final cure.
This 310ml sealant comes in a PCR cartridge, allowing for easy application and minimising waste. The product’s primerless adhesion means it can be used on most common construction materials, simplifying the sealing process. It's particularly well-suited to glazing and frame joints that require a robust seal against moisture exposure.
The acetoxy cure formulation provides a quick, durable seal with a clear finish which blends seamlessly around windows, mirrors, and frames, maintaining their aesthetic appearance. However, it’s important to note that the curing process releases a vinegar-like odour – this is typical of acetoxy cures and will dissipate as the sealant fully hardens.
For interior applications only, the BOSTIK Pro-Sealant S29 delivers a practical and effective way to protect your joints from the damaging effects of humidity and mould growth. The product includes one 310ml PCR cartridge with the Bostik brand name and manufacturer details – ASIN B0BZDYRS52.
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FAQ
What is this sealant best used for?
The Bostik Pro-Sealant S29 is formulated for glazing and frame joints, particularly those exposed to high humidity environments like bathrooms and kitchens. It’s ideal for sealing around windows, mirrors, and other interior frames where moisture resistance is crucial.
What materials does it adhere to?
This sealant offers primerless adhesion on most common construction materials including glass, wood, and metal commonly found in interior applications. However, it's specifically designed for internal use only.
What are the dimensions of the packaging?
The product is supplied in a 310ml PCR cartridge, offering sufficient volume for typical sealing tasks within an interior setting.
Is this sealant suitable for outdoor use?
No, this sealant is specifically formulated for interior use only. Exposure to external weather conditions could compromise its performance and resistance to mould.
Does it have a strong odour while curing?
Yes, the acetoxy cure process produces a vinegar-like odour during the sealant’s initial curing period. This odour typically dissipates as the sealant fully hardens.
How does this compare to other sealants in a similar price range?
The Bostik Pro-Sealant S29 offers a good balance of performance and cost, providing effective moisture resistance and fast curing times comparable to similarly priced silicone sealants on the market.
What maintenance should I do to ensure its longevity?
Regular cleaning with a damp cloth is recommended to remove dirt and grime. Avoid using harsh chemicals or abrasive cleaners that could damage the sealant's surface.
Is this sealant flexible?
Yes, it’s a high elastic sanitary silicone offering excellent flexibility which allows for movement in joints without cracking or losing its seal.
What is the cartridge size?
The sealant comes in a 310ml PCR (Post Consumer Recycled) cartridge, providing ample material for various sealing projects.
Does it contain any mould-resistant additives?
Yes, the sealant contains a powerful fungicide agent, helping to prevent unsightly mould and black spot formation on surfaces where it is applied – suitable for use in humid environments.
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