Dulux Weathershield Merlin 10L Paint is a high-quality decorative coating for exterior walls. It is formulated for professional use; being easy to apply and has excellent opacity.
For dependable exterior protection with a clean, contemporary edge, Dulux Weathershield Merlin 10L is a solid choice for professional trades and serious DIY projects. Engineered for Irish weather conditions, this smooth masonry paint provides long-lasting defence against driving rain, frost and UV exposure — helping your property maintain its finish year after year.
The subtle Merlin shade delivers a modern, versatile look that complements both traditional and newer builds. Its advanced flexible formulation helps resist cracking, peeling and flaking, while built-in mould and algae resistance keeps exterior walls looking fresher for longer. With strong opacity and reliable coverage, it’s ideal for full façades, boundary walls and renovation work.
Key Features:
All-Weather Protection: Designed to perform in harsh exterior conditions.
Excellent Coverage: High hiding power for efficient two-coat application.
Flexible & Durable Finish: Helps prevent cracking and flaking over time.
Mould & Algae Resistant: Protects the paint film from organic growth.
Easy Application: Suitable for brush, roller or spray use.
Technical Specifications:
Product Code: 5084639
Size: 10 Litres
Coverage: Approx. 16m² per litre (depending on surface texture and porosity)
Always prep properly — remove loose paint, treat any algae or mould, and ensure surfaces are clean and dry. Two even coats will give the best durability and depth of colour, particularly on exposed elevations.
We offer reliable delivery services throughout the Republic of Ireland, with straightforward delivery charges for both trade and DIY customers. Delivery options are confirmed at checkout based on your order and delivery Eircode.
Delivery Charges & Delivery Times
Delivery Type
Delivery Area
Delivery Charge
Delivery Time
Small Items
Republic of Ireland
€9.99
3–4 working days
Large & Heavy*
Standard delivery area
€29.99
5–7 working days
Extra Large*
Standard delivery area
€50.00
5–7 working days
Paint 5L or less**
Standard delivery area
€19.99
5–7 working days
Swipe sideways to compare delivery options.
Small Items
Delivery area
Republic of Ireland
Charge
€9.99
Delivery time
3–4 working days
Large & Heavy*
Delivery area
Standard delivery area
Charge
€29.99
Delivery time
5–7 working days
Extra Large*
Delivery area
Standard delivery area
Charge
€50.00
Delivery time
5–7 working days
Paint 5L or less**
Delivery area
Standard delivery area
Charge
€19.99
Delivery time
5–7 working days
*Standard delivery policy. Promotional delivery rates may apply during campaigns.
Additional Information
FREE delivery on eligible Small Items and Large & Heavy orders over €1,499, within the standard delivery area only.
Special Order and Catalogue Products require an additional 5 working days.
FREE collection of old appliances is available through WEEE Ireland when purchasing qualifying large appliances.
FREE Click & Collect is available for items in stock at your selected branch.
Large & Heavy and Extra Large items are available within our standard delivery area only.
Paint delivery Paint in tin cans 5L or less is available for delivery. Larger sizes and paint supplied in plastic buckets are available for Click & Collect only.
TJ O'Mahony offers a 30-day returns policy on eligible unused products, giving you additional time beyond the statutory 14-day cooling-off period applicable to most online consumer purchases.
Eligible products can be returned for a refund or exchange within 30 days of delivery or collection, provided they are unused, in their original and re-saleable condition, complete with all supplied parts and accessories, and accompanied by proof of purchase.
Please note: Return restrictions apply to certain products, including Mixed Paint, certain Bagged Building Products, Solid Fuel, Special Order, Non-Stock and Catalogued Products.
Your statutory rights in relation to faulty, damaged, incorrectly supplied or non-conforming goods are not affected.
