Ronseal Quick Dry Damp Seal Aerosol - White - 400ml

Permanently fix damp patches in your home with this quick drying and easy to apply Damp Seal, ideal for walls and ceilings. The handy aerosol application is ideal for hard to reach areas and the fast drying formulation takes only 10 minutes to dry allowing you to apply multiple coats quickly. Once finished the surface can be painted or wallpapered over.

• Permanently block damp stains
• Ideal for damp surfaces
• Can be decorated over
• Prevents paint from flaking & peeling

Always ensure the surface to be covered is free from dirt, dust, grease, and any loose or flaking paint.

• It is important to fix the core problem of the damp before covering it up otherwise this product may fail and the damp will come back.
• Sand and remove any peeling or flaking paint to leave a smooth surface.
• If you have any mould use Polycells 3 in 1 Mould Killer to remove it.

We recommend performing a test to ensure compatibility, always follow the manufacturer's instructions found on the can.

• Before you start ensure room temperature is above 10°C and the room is well ventilated. Cover any areas and furniture you'd like to protect from over spray.
• Shake the can until you hear it rattle and keep going for a minute.
• Hold it upright and approximately 20-30cm away from the wall or ceiling.
• Spray in a smooth side to side movement for even coverage.
• Wait 10 minutes for the first coat to dry and apply a further 2 coats.
• Allow to dry for 24 hours from the final coat before decorating.

As this damp seal and not intended to be a top coat, it should be painted or wallpapered over.

Cleaning

To clean the nozzle, just turn the can upside and spray for a few seconds. Then wipe the nozzle with a damp cloth.

Delivery - All orders placed on a working day before 3pm will be dispatched on the same day for next working day delivery. Orders placed before 3pm on Friday will be delivered on Monday (excluding bank holidays). Orders placed on weekends and Bank Holidays will be dispatched on the next working day. 

Delivery of Tinted Products - Tinted paints are dispatched in line with our express order process, shown below. However, due to their bespoke nature, please allow up to an additional 5 working days to accommodate any potential courier delays or delivery issues before receiving a refund or replacement.

We strongly suggest customers avoid booking tradespeople until they receive their order. Next Day Paint will not be held liable for any costs incurred due to order processing errors, delivery delays, or other issues that may result in financial loss.

Delivery Options

Express Shipping - £3.99

Order by: 3pm, Monday - Sunday

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

AM Delivery - £12.99

Order by: 2pm, Monday - Sunday

Expected delivery: Next working day by 2pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following AM

Late Cut-Off - £5.99

Order by: 4pm, Monday - Friday 

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

Saturday Delivery - £9.95

Order by: 2pm, Friday 

Expected delivery: Saturday, 8am - 9pm

Standard Delivery (Out of Zone Postcodes Only) - £6.99

Order by: 3pm, Monday - Sunday 

Expected delivery:  3-5  working days, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

We do not deliver to the Channel Islands or the Republic of Ireland

Certain postcodes delivery times and charges may vary please head to the cart to see your available delivery options.

Returns

We offer a 14 day money back guarantee for all goods shipped correctly that are not required. If the item is not required, please send the item back for a full refund in its original condition, unused with its original packaging. Please note return for unwanted item is at your own expense.

Contact us as soon as possible to inform us you will be returning the product either by a contact form or by calling our team on 0161 960 0217.

All tinted paint purchases are final and non-refundable. If you're unsure about your selection, please refer to the product listing or contact us for guidance before ordering. Once mixed, tinted paints cannot be returned or refunded, regardless of delivery delays or changes in circumstances.

While we aim to meet delivery timelines, we are not responsible for delays caused by couriers, weather, or other external factors.

We recommend ordering samples or colour charts before purchasing. While we strive to represent colours accurately, screen settings and surface types can affect appearance. Opened tins cannot be returned due to dissatisfaction with colour.

For non-tinted products, we offer a 14-day money-back guarantee. Items must be returned unused, in original condition and packaging, at your own expense.

Damaged Paint

Please visit our damages page, where we can help resolve the issue for you. 

Incorrect Item

If we have sent you a different item from what you ordered, we will be happy to organise an exchange for the correct goods at no extra charge to yourself, please get in touch to organise this.

Faulty Items

Faulty items can be refunded or exchanged within 30 days. All returns are tested, and if no fault is found, no refund will be issued you'll have the option to have the item returned. For faults discovered after 30 days, please contact the manufacturer for further support.