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Johnstone's

Johnstone's Exterior Undercoat 750ml

Johnstone's Exterior Undercoat 750ml

SKU:669571

Regular price £10.99 GBP
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Johnstone's Exterior Undercoat 750ml White

For superior durability and a flawless finish, Johnstone’s 6 Year Exterior Undercoat is your ideal choice for exterior wood and metal surfaces. This specially formulated undercoat has been developed to complement Johnstone’s 6 Year Exterior Gloss, creating a long-lasting and highly durable high gloss finish. Its flexible and resilient composition ensures that it can withstand the challenges of outdoor conditions while preventing common issues such as blistering, cracking, and peeling.

Key Features:

  • Exceptional Durability: Specifically designed to provide a strong, long-lasting base for Johnstone’s 6 Year Exterior Gloss, ensuring a smooth, glossy finish that lasts.

  • Enhanced Flexibility: Retains flexibility longer than traditional undercoats, helping to prevent cracking and blistering in changing weather conditions.

  • Resistant to Weathering: Offers exceptional protection against blistering, cracking, and peeling, ideal for use on exterior surfaces.

  • Compatible with Johnstone’s 6 Year Exterior Gloss: When used together, this undercoat and gloss combination provides up to 6 years of reliable outdoor protection.

  • Oil-Based Formula: Ensures excellent adhesion and coverage on wood and metal surfaces.

  • Fast Drying Time: Touch dry in 4–6 hours, enabling quicker application and project completion.

Technical Specifications:

  • Paint Type: Oil-Based

  • Coverage: 12m² per litre

  • Dry Time: Touch dry in 4–6 hours

  • Application: Brush or roller

  • Recommended Surfaces: Exterior wood, metal

Product Dimensions:

Dimension Measurement
Boxed Weight 740 g
Volume 750 ml

Additional Information:

  • Country of Origin: Great Britain

  • Commodity Code: 3209100000


Frequently Asked Questions (FAQs)

Q: Is this undercoat suitable for use on previously painted surfaces?
A: Yes, this undercoat is suitable for both bare and previously painted surfaces, as long as the existing paint is in good condition and has been properly prepared.

Q: Can this undercoat be used with gloss paints from other brands?
A: For best results, it is recommended to use this undercoat with Johnstone’s 6 Year Exterior Gloss, as the two are formulated to work together to provide up to 6 years of protection. Using it with other gloss brands may not deliver the same performance.

Q: How many coats of undercoat should I apply?
A: Typically, one coat of Johnstone’s 6 Year Exterior Undercoat is sufficient, followed by one or two coats of the exterior gloss. Always ensure the surface is clean and dry before application.

Q: Is this product suitable for use in coastal or high-moisture environments?
A: Yes, when used as part of the Johnstone’s 6 Year Exterior System, this undercoat provides excellent protection in coastal and high-moisture environments.


Warranty Information:

Johnstone’s guarantees that Johnstone’s 6 Year Exterior Undercoat will provide up to 6 years of durability when applied as part of the Johnstone’s 6 Year Exterior System. This warranty covers performance under normal weather conditions. Issues resulting from improper application, unprepared surfaces, or extreme environmental exposure are not covered.