ᐅ Painting a KALLAX Back Panel with Magnetic Paint – Does It Work?
Created on: 20 Aug 2020 08:37
I
ixnon
Hello everyone,
I recently bought a KALLAX shelf unit from IKEA and am considering applying magnetic paint to the back panel to make it more flexible for attaching items like photos, notes, or small magnetic key hooks.
My main question is: Does this really work well on the thin particleboard of the KALLAX back panel? I've heard that magnetic paint can be tricky because it usually requires several coats to achieve enough magnetic strength to hold decent magnets, and since the KALLAX back panel is very thin and relatively delicate, I'm concerned.
Has anyone here had practical experience painting the KALLAX back panel with magnetic paint? How many coats are necessary, and how well does it actually hold? Are there any tips or precautions to keep in mind (e.g., primer, sanding between coats, etc.) to avoid damaging the back panel while still getting a good magnetic effect?
I’d really appreciate it if someone could share their experience or advice, as I want to make sure this investment isn’t wasted.
Thanks in advance!
I recently bought a KALLAX shelf unit from IKEA and am considering applying magnetic paint to the back panel to make it more flexible for attaching items like photos, notes, or small magnetic key hooks.
My main question is: Does this really work well on the thin particleboard of the KALLAX back panel? I've heard that magnetic paint can be tricky because it usually requires several coats to achieve enough magnetic strength to hold decent magnets, and since the KALLAX back panel is very thin and relatively delicate, I'm concerned.
Has anyone here had practical experience painting the KALLAX back panel with magnetic paint? How many coats are necessary, and how well does it actually hold? Are there any tips or precautions to keep in mind (e.g., primer, sanding between coats, etc.) to avoid damaging the back panel while still getting a good magnetic effect?
I’d really appreciate it if someone could share their experience or advice, as I want to make sure this investment isn’t wasted.
Thanks in advance!
Additional information:
Magnetic paint usually contains fine iron powder that is magnetically conductive. However, the amount and especially the layer thickness determine the holding strength.
For KALLAX back panels with a thickness of about 3 mm (0.12 inches), manufacturers often advise against heavy loads, as the stability is technically limited.
In practice:
- Apply at least 3 coats of magnetic paint, allowing each coat to dry for 2-3 hours.
- Use a wood primer beforehand to seal the surface.
- Apply the topcoat thinly so the magnetic strength is not compromised.
I would recommend using a metal sheet behind the back panel for stronger magnets. The added thickness and rigidity significantly improve durability.
As a rule of thumb:
Strong magnets (neodymium, ≥ N35) require at least 1-2 mm (0.04-0.08 inches) of iron or steel beneath the surface. With less material, the holding effect is greatly reduced.
Therefore, KALLAX back panels are more suited for light magnets, such as those holding paper or photos, but not for heavy objects.
This post is neutral and based on manufacturer data as well as own measurements.
Magnetic paint usually contains fine iron powder that is magnetically conductive. However, the amount and especially the layer thickness determine the holding strength.
For KALLAX back panels with a thickness of about 3 mm (0.12 inches), manufacturers often advise against heavy loads, as the stability is technically limited.
In practice:
- Apply at least 3 coats of magnetic paint, allowing each coat to dry for 2-3 hours.
- Use a wood primer beforehand to seal the surface.
- Apply the topcoat thinly so the magnetic strength is not compromised.
I would recommend using a metal sheet behind the back panel for stronger magnets. The added thickness and rigidity significantly improve durability.
As a rule of thumb:
Strong magnets (neodymium, ≥ N35) require at least 1-2 mm (0.04-0.08 inches) of iron or steel beneath the surface. With less material, the holding effect is greatly reduced.
Therefore, KALLAX back panels are more suited for light magnets, such as those holding paper or photos, but not for heavy objects.
This post is neutral and based on manufacturer data as well as own measurements.
Thank you all for the quick and detailed responses!
@glamo, I plan to use this magnetic paint from a well-known manufacturer that has a high fine iron content, followed by a matte white topcoat. It’s good that you pointed out the weakening effect of the topcoat; I will keep that in mind.
@Genevieve, the metal sheet idea sounds really interesting. I was just worried that the extra weight and slight warping of the back panel might damage my KALLAX unit, but maybe I should reconsider.
One more question for everyone: How about the effort involved? Painting with magnetic paint, sanding nine times, and applying three to four layers sounds like a lot of work, especially if you’re only working on one back panel. Is it usually that time-consuming in practice, or is there a way to speed up the process?
I’m willing to accept some risk of warping and bubbles, but of course, these should be avoided as much as possible.
Looking forward to any tips!
@glamo, I plan to use this magnetic paint from a well-known manufacturer that has a high fine iron content, followed by a matte white topcoat. It’s good that you pointed out the weakening effect of the topcoat; I will keep that in mind.
@Genevieve, the metal sheet idea sounds really interesting. I was just worried that the extra weight and slight warping of the back panel might damage my KALLAX unit, but maybe I should reconsider.
One more question for everyone: How about the effort involved? Painting with magnetic paint, sanding nine times, and applying three to four layers sounds like a lot of work, especially if you’re only working on one back panel. Is it usually that time-consuming in practice, or is there a way to speed up the process?
I’m willing to accept some risk of warping and bubbles, but of course, these should be avoided as much as possible.
Looking forward to any tips!
Hey Ixnon! 🙂
Your project sounds like a really clever idea – I enjoy these kinds of DIY challenges!
Regarding your point about the effort involved: Yes, applying magnetic paint is definitely a test of patience. You’ll need at least 3 coats, with each one drying for at least 2 hours, although more would be ideal to maximize magnetic adhesion, especially with a thin back panel. By the way, you can lightly sand between coats with very fine sandpaper—it only takes about 5 minutes per layer.
Don’t worry, you don’t have to do a full sanding between every coat. A light sanding to remove any rough spots is enough to help the next layer adhere better.
And hey, if it feels too time-consuming, how about using a magnetic sheet instead? You can just stick it on, it’s thin, lightweight, and saves you the long drying times—just a thought 😉
Hope I could boost your motivation a bit—and I’m curious to see how it turns out for you in the end!
Your project sounds like a really clever idea – I enjoy these kinds of DIY challenges!
Regarding your point about the effort involved: Yes, applying magnetic paint is definitely a test of patience. You’ll need at least 3 coats, with each one drying for at least 2 hours, although more would be ideal to maximize magnetic adhesion, especially with a thin back panel. By the way, you can lightly sand between coats with very fine sandpaper—it only takes about 5 minutes per layer.
ixnon schrieb:
Painting with magnetic paint nine times, sanding, and applying three to four coats sounds like a lot of work
Don’t worry, you don’t have to do a full sanding between every coat. A light sanding to remove any rough spots is enough to help the next layer adhere better.
And hey, if it feels too time-consuming, how about using a magnetic sheet instead? You can just stick it on, it’s thin, lightweight, and saves you the long drying times—just a thought 😉
Hope I could boost your motivation a bit—and I’m curious to see how it turns out for you in the end!
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