Knot Block Wood Primer and Undercoat
Completely stops wood knots and resins from showing through your paint. It’s also a primer and undercoat which means you can tackle two jobs at the same time. It covers bold colours and dark marks to give you a flawless finish.
- Everything you need in one tin
- Guaranteed to block wood knots
- Ready to paint over in four hours
- Can be used on bare or previously painted wood
- Won’t yellow, crack or peel
- Permanently blocks wood knots
- Helps paint stick & last longer
- Touch dry in 30 minutes
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How much Primer and Undercoat do I need?
Measure your area precisely, drop the numbers into this smart calculator and it will tell you straight away how many litres you'll need to complete your project.
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Interior wood
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Doors & windows
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Smooth planed wood
White
Need to know
Touch dry in only 30 minutes and ready to paint over in four hours. Watch our video to find out how to use knot block.
Watch videoYou can paint over this primer with any colour you like and the knots won’t ruin your finish.
2 coats to completely stop knots
Brush
4 hours
How to use knot block
Before you start
This primer preps your for painting but you still need to prep for the primer.
Put down dust sheets to protect your floors from paint.
Preparation
- Use 120 grit sandpaper to lightly sand the wood. This will help you get an even finish and ensures the paint sticks.
- If you have any loose, flaking or peeling coatings sand them off to reveal the bare wood.
- Let the dust settle and wipe it up with white spirit and a cloth.
- If you notice any cracks or holes, fill them in.
Application
- Give your tin a really thorough stir until it’s a smooth consistency.
- Use a brush and paint it on in the direction of the grain.
- Wait four hours for the first coat to dry.
- Apply the second coat.
- Wait four hours for it to dry and that’s it, you’ve finished!
Aftercare
Cleaning
Your brushes can easily be cleaned in warm soapy water.
Remember this is only a primer and undercoat, so you should paint over it.
Repair
If you notice damage or your primer has chipped, it’s easy to repair. Just sand down the area that needs repairing and then apply two more coats. And that’s it, it’ll be fixed.
Technical specification
| Usage | Interior wood including windows, doors and skirting boards |
| Coverage | 250ml - This tin will cover 1.5m2 with 2 coats 750ml - This tin covers 4.5m2 with 2 coats 2.5L - This tin will cover 14m2 with 2 coats |
| Dry time | Touch dry in 30 minutes, paint over in 4 hours |
| Coat time | Four hours |
| Number of coats | Two |
| Colours | White |
| Finish | Matt |
| Durability | Stops knots in their tracks |
| Application | Brush |
| Sizes | 250ml, 750ml, 2.5L |
| VOC | Medium |
How to guides
Easy to follow steps to help you do a professional job on any DIY project.
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