Protect your exterior bricks, stone, concrete and wood from damage with Thompson's Water Seal. The liquid is easy to apply and can be placed directly onto damp surfaces in need of defence. Brush off growths in the area before administering a smooth and even coat across an entire wall. One coat usually takes two hours to dry, and a second can be applied after the first to give lasting layered protection.
Fractures happen when water gets into the material, freezes, then thaws - this water seal soaks into the material blocking up pores that rain would normally penetrate. The hydrophobic wax repels water and stops freeze and thaw weathering before it can occur. Water Seal's micro silicone emulsion also reduces the build-up of moss and plant life that can create bigger cracks. Plus, the low-strength odour allows you to apply it without irritating fumes.
• Protection for bricks, stone and concrete
• Prevents damage caused by freezing and thawing
• Coverage up to 10m²/litre depending on porosity of the substrate
• Suitable for outdoor use only
• Hazard safety codes: R38

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.