• +/- 25% flexibility
• Neutral cure
• Mould resistant
• Low modulus
• EC1 Plus - very low emissions
• Interior and exterior use



BOSTIK PRO S31 NEUTRAL CURE SANITARY SILICONE SEALANT is a professional grade, neutral cure silicone sealant developed for sealing sanitary joints.

Sanitary joints are continually exposed to moisture and humidity. Some materials, including metal, may also be subject to corrosion. This neutral cure silicone sealant adheres well with different surfaces and cures under humidity, making it ideal for sealing joints around baths, sinks, toilets, showers, kitchen furniture etc.

With an advanced mould resistant formula, this white sanitary silicone is low modulus and offers up to 25% movement capability.

Bostik S31 is ISEGA certified, meaning it's safe for use in food storage and preparation areas. It's also GEV EMICODE EC1 PLUS certified for very low emissions and has low odour. It's suitable for interior and exterior use, and is supplied in a post-consumer recycled (PCR) cartridge.

• +/- 25% flexibility - allows for movement
• Low odour
• Interior & exterior use
• GEV-EMICODE EC1 PLUS certified - very low emissions
• ISEGA certified - safe for use in food storage and preparation areas
• Post-consumer recycled (PCR) cartridge

Delivery (UK mainland only)

 

Next Day: £5, or FREE over £40

- Order by 9pm Mon-Thu: next working day

- Order Fri to 5pm Sun: Monday

- Order after 5pm Sun: Tuesday

 

Pre-12pm: £10

- Same cut-offs as Next Day above

 

Saturday & Sunday: £10, or £5 over £40, or FREE over £75

- Saturday: order by 6pm Fri

- Sunday: order by 4pm Sat

 

Heavy items (over 30kg)

- Mon-Fri only. Order by 6pm and allow up to two working days

- Order after 6pm Thu: arrives after the weekend

 

Supplier items

- Sent directly by the supplier, so timings vary. Lead times appear on the product page in working days (Mon-Fri)

 

More about delivery 

Next Business Day Collection (eligible items)

- Order by 9pm Mon-Thu: collect next day

- Order after 9pm Thu to 5pm Sun: collect Monday

- Heavy items (over 30kg): allow up to two working days

 

Opening hours

- Weekdays vary by branch: open 6:30am-7am, close 6pm-8pm

- Saturday: 7am-6pm

- Sunday: 9am-4pm

 

Check your local store's hours and that it's open before visiting. Please wait for our text or email before collecting.

 

Holding your order
We'll hold it for 14 days, then automatically refund your original payment method.