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Thread: Sealing MDF on Router Table
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28th June 2015, 09:45 PM #1New Member
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Sealing MDF on Router Table
My first post - I have just purchased a Kreg benchtop router table. The table itself is laminated on both top and bottom, and edgebanded on all 4 sides. The fence moves in slots cut through the MDF, rather than in aluminium tracks. Just wondering if it would be would be worthwhile sealing the sides of the slots and the plate insert with a couple of coats of something like polyurethane to prevent the absorption of moisture, that over time makes MDF swell and go "furry" (like my old Triton router table MDF bits).
Also the fence cheeks, although laminated on both sides, have raw MDF on all edges.
I want it to last, but don't want to waste my time if there is nothing to be gained by doing it. Any advice welcome.
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28th June 2015, 10:10 PM #2
It certainly can't hurt...personally, I'd start with something like tung oil or shellac, as you don't want the hassle of using a film forming finish that might require sanding to get things running freely again.
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28th June 2015, 10:24 PM #3
Penetrol.
http://www.floodaustralia.net/produc...l_wood_oil.php
Once the can is open, it doesn't keep.Cliff.
If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.
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29th June 2015, 11:10 AM #4GOLD MEMBER
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I've found that MDF will take as much oil based finish as you can throw at it. I'd be using a sealing type finish like the shellac already mentioned.
The absolute best way to seal MDF edges is CA (aka Superglue). Buy a few packs of 6 tubes at the $2 shop. Flood the surface and spread with a disposable brush. Work fast, wear gloves and glasses. If you don't have a suitable mask, do it outside- the fumes are murder. Check out YouTube. This is how I seal MDF edges on speaker cabinets before spraying lacquer. It turns the MDF rock hard.
Anything will be better than nothing!
Cheers
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29th June 2015, 11:42 AM #5New Member
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Thanks everyone. Very helpful info. I'll get cracking with it - much easier to do before I assemble everything.
Cheers.
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