Rustins Knotting is a traditional, highly effective solution designed to seal knots and resinous areas in timber, preventing unsightly staining and resin bleed-through that can spoil painted finishes. This preparatory treatment is essential for ensuring a professional and lasting paint finish on softwoods and other resinous timbers.
Key Features & Benefits:
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Effective Knot Sealant:
Prevents resin and sap bleed-through, protecting the integrity of painted surfaces. -
Quick Drying:
Ready for priming in approximately 1 hour, allowing for fast project progression. -
Suitable for Resinous & Creosoted Timber:
Ideal for sealing surfaces prone to staining from natural oils and resins. -
Traditional Shellac-Based Formula:
Provides a proven, reliable barrier over timber knots. -
Easy Application:
Applies easily with a brush; dries to a hard, sealed finish ready for painting.
Technical Specifications:
| Specification | Detail |
|---|---|
| Type | Shellac-based knotting solution |
| Drying Time | Approx. 1 hour (may vary with temperature and humidity) |
| Recommended Coats | 1–2 coats depending on the resin content |
| Clean-Up | Methylated spirits |
| Suitable Surfaces | Bare wood, resinous and creosoted timber |
| Finish | Clear/semi-clear shellac finish |
| Application Method | Brush |
| Interior/Exterior | Suitable for both |
Application Instructions:
- Surface Preparation:
- Sand the surface smooth to remove any roughness.
- Ensure the area is dry, clean, and dust-free.
- Application:
- Stir well before use.
- Apply liberally over knots and surrounding areas using a brush.
- Coating:
- For resinous and creosoted timber, apply two coats for full sealing.
- Allow approximately 1 hour drying time between coats and before applying primer.
- Aftercare:
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Do not sand the knotting after application, as this may break the seal.
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Clean brushes with methylated spirits immediately after use.
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Recommended Applications:
- Sealing knots on doors, windows, skirting boards, and furniture
- Priming timber panelling and joinery prior to painting
- Preparing creosoted timber to ensure a smooth, stable paint base
- Suitable for both new and aged wood
Important Usage Notes:
- Compatibility: Not recommended for use under polyurethane clear varnishes, water-based varnishes, or water-based paints as it may impair adhesion or cause discoloration.
- Priming: Once dry, overcoat with a suitable primer before applying the final paint finish.
FAQs:
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Q: Can I use Rustins Knotting on exterior wood?
A: Yes, it is suitable for exterior use but must be overcoated with a suitable exterior primer and paint. -
Q: Is this product clear when dry?
A: It typically dries with a slight amber tint due to the shellac content, but this is covered when painted over. -
Q: How do I clean my brush after use?
A: Clean brushes thoroughly with methylated spirits immediately after use. -
Q: Can I apply water-based paint over Rustins Knotting?
A: No, this product is not suitable under water-based paints or varnishes. Use an oil-based primer and finish instead.
Safety & Storage Information:
- Flammable: Keep away from heat, sparks, and open flames.
- Use in a well-ventilated area.
- Store tightly closed in a cool, dry place.
- Keep out of reach of children.
Warranty Information:
Rustins guarantees product quality when applied as per the instructions. For technical support, contact Rustins Customer Service.
