Johnstone's Exterior Hardwearing Undercoat - Grey

Name: Johnstone's Exterior Hardwearing Undercoat - Grey
Brand: Johnstone's
SKU: amonrxytfg
Availability: InStock

Prepare your outdoor spaces for perfection with Johnstone's Exterior Hardwearing Undercoat. Design...

Best current price£15.81from B&Q

Colour

Grey White

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Product Information

Full details

This Johnstone's Exterior Hardwearing Undercoat in Grey is designed for homeowners and DIY enthusiasts looking to achieve a durable and long-lasting finish on exterior wood and metal surfaces. Its key benefit is providing a robust, weather-resistant base that enhances adhesion and longevity for your topcoat, preventing common issues like peeling and cracking. A potential caveat is its oil-based formulation, which requires specific cleanup procedures. The undercoat offers enhanced durability, superior adhesion, moisture resistance, and perfect preparation for a flawless final appearance.

All features

Colour	Grey
Brand	Johnstone's

Extended Product Information

FAQs

What surfaces can I use Johnstone's Exterior Hardwearing Undercoat on?

This undercoat is suitable for exterior wood and metal surfaces. It can also be used on masonry when prepared correctly.

What is the coverage rate of this undercoat?

The coverage rate is approximately 12 square meters per litre.

How long does it take for the undercoat to dry?

The undercoat is touch dry in 4-6 hours. Ensure it is fully dry before applying the topcoat.

Can I use this undercoat with any topcoat?

It is specifically developed for use with Johnstone's 6 Year Exterior Gloss for optimal durability. While it may be compatible with other exterior paints, using the recommended topcoat ensures the best performance.

How do I clean my brushes after using this product?

As it is an oil-based product, you will need to clean your brushes and equipment immediately after use with white spirit or a suitable paint thinner.

Can I use this undercoat in damp conditions?

It is best to avoid applying the undercoat in very damp or humid conditions, or when rain is expected. Ensure surfaces are dry before application.

What are the delivery restrictions for this product?

Due to geographical locations, Johnstone's is unable to deliver this product to the Isle of Wight, Isle of Man, and Ireland.

Troubleshooting

Undercoat not adhering well

Ensure the surface was properly prepared, clean, dry, and free from contaminants. Lightly sand glossy surfaces before application. Check that the correct type of surface (wood/metal) is being coated.

Peeling or cracking after topcoat application

This may indicate insufficient drying time between coats or inadequate surface preparation. Ensure the undercoat is fully dry (4-6 hours minimum) before applying the topcoat. Re-check surface preparation, especially for dampness or contaminants.

Difficulty cleaning brushes

Use white spirit or a designated oil-based paint thinner immediately after painting. If paint has dried on the brush, it may be difficult to fully restore.

Uneven finish

Ensure the undercoat was stirred thoroughly before application and applied evenly. Avoid over-brushing or applying too thickly. Ensure proper surface preparation to create a smooth base.

Pros and Cons

Pros

Provides excellent durability against outdoor elements.
Ensures superior adhesion for the topcoat, reducing future issues.
Offers effective moisture resistance to protect surfaces.
Prepares surfaces well for a smooth, high-quality finish.
Suitable for multiple exterior materials like wood and metal.

Cons

Oil-based formula requires specific thinners for cleanup.
Touch-dry time can be between 4-6 hours, requiring patience between coats.
Limited delivery locations (Isle of Wight, Isle of Man, Ireland excluded).
Primarily designed for use with Johnstone's 6 Year Exterior Gloss for optimal results.

Setup, Compatibility & Care

Preparation: Ensure all surfaces to be painted are clean, dry, and free from loose paint, dirt, grease, and rust. Lightly sand any glossy surfaces to improve adhesion. For bare wood, ensure it is sound and dry. For bare metal, treat any existing rust and apply a suitable metal primer if necessary.

Compatibility: This undercoat is specifically recommended for use with Johnstone's 6 Year Exterior Gloss. It is suitable for exterior wood and metal surfaces. Do not apply in excessively damp conditions.

Application: Apply using a good quality brush or roller. Stir the undercoat thoroughly before use. Apply a thin, even coat. Allow to dry completely (4-6 hours) before applying the topcoat.

Care & Cleanup: Due to its oil-based nature, clean brushes, rollers, and any spills immediately after use with white spirit or a suitable paint thinner. Store in a cool, dry place, away from direct sunlight and extreme temperatures. Ensure the lid is tightly sealed to preserve the product.