Johnstone’s Trade Knotting Solution Clear – 250ml

Johnstone’s Trade Knotting Solution Clear 250ml is a professional-grade primer designed to seal knots, resin spots and sap streaks in timber before decorating. This clear, fast-penetrating formula stabilises knotty areas to prevent unsightly bleed-through and resin migration, ensuring a clean, stable surface for subsequent primers, undercoats and topcoats.

Ideal for interior and exterior timber preparation, it helps deliver a smooth and consistent finish for painting and staining projects.

Key Features

• Product Name: Johnstone’s Trade Knotting Solution Clear

• Size: 250ml

• Type: Knot and resin sealing primer

• Clear, fast-drying formulation

• Penetrates deeply into timber knots and resin pockets

• Stabilises and seals problematic wood areas

• Helps prevent discolouration and bleed-through

• Suitable for interior and exterior use

• Easy brush-on application

• Professional trade-grade performance

Effective Knot & Resin Sealing

Timber knots and resin-rich areas can cause staining and discolouration if not properly sealed before applying decorative coatings. Johnstone’s Trade Knotting Solution Clear penetrates beneath the surface to lock in resin and sap, creating a sealed substrate that reduces the risk of bleeding and staining through subsequent paint layers.

Perfect for use on:

• Softwood and hardwood timber

• Timber doors and frames

• Window surrounds and architraves

• Floorboards and skirting

• Exterior joinery and cladding

• Fence posts and garden timber

Clear Primer for Precision Preparation

The transparent nature of this knotting solution allows decorators and tradespeople to see the treated surface clearly, making it easier to assess coverage and ensure even application. It provides an ideal base for primers and undercoats, helping improve adhesion and overall finish quality.

Coverage & Application

• Coverage: Approximately 12–15m² per litre (surface dependent)

• 250ml Coverage: Approximately 3–3.75m² per application

Application Guidance:

• Apply directly to knots, resin zones and sap streaks using a brush.

• Allow the knotting solution to penetrate and dry before overcoating.

• Once dry, proceed with primer, undercoat or stain as required.

• Stir well before use and reseal the container after use.

Why Choose Johnstone’s Trade Knotting Solution Clear 250ml?

For professional decorators, joiners and DIY timber workers, Johnstone’s Trade Knotting Solution Clear offers reliable sealing performance that helps eliminate knot and resin issues before decorating. Its clear, fast-drying formula makes timber preparation easier and more effective — setting the foundation for a superior final finish.