MDF mortise

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Forum topic by ed23 posted 08-02-2020 11:25 PM 260 views 0 times favorited 4 replies Add to Favorites Watch
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45 posts in 79 days

08-02-2020 11:25 PM

I mortised these concealed hinges into 5/8 mfd leaving an 1/8 material and its so fibrous in the hole. I could use my fingernail and go thru the board. I realize the hinge will be in there but should I coat the hole with something in case moisture gets in there?

4 replies so far

View Aj2's profile (online now)


3325 posts in 2646 days

#1 posted 08-03-2020 01:08 AM

Why would moisture get in there.
I would focus on your screw installing that’s going to be tricky.

Good Luck

-- Aj

View Rich's profile


5868 posts in 1437 days

#2 posted 08-03-2020 05:21 AM

No need to deal with that. Screws hold well in the face of MDF and that will keep the hinge secure.

-- Half of what we read or hear about finishing is right. We just don’t know which half! — Bob Flexner

View CaptainKlutz's profile


3589 posts in 2342 days

#3 posted 08-03-2020 06:24 AM

Thought I was being smart and poured some shellac into the fuzzy holes, and when I tried to pour out the excess; there was none. It was dripping out bottom onto the bench. Normally fill MDF edges/pores with dry wall compound and use BIN primer. The shellac around hole left a noticeable texture variation across the panel. Ended up needing to seal the entire door face with 2nd coat of primer and sand down the first one to even out the surface texture. #IAMAKLUTZ
Better plan is spray primer on all surfaces at same time to avoid the bleed through.

-- If it wasn't for bad luck, I wouldn't have no luck at all, - Albert King - Born Under a Bad Sign released 1967

View AlaskaGuy's profile (online now)


5984 posts in 3157 days

#4 posted 08-03-2020 06:55 AM

With MDf and melamine board I always use the plastic dowels.

-- Alaskan's for Global warming!

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