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Which filler?

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Which filler?

Postby TrimTheKing » 01 Jun 2020, 13:05

Hi all

I’m doing a little refurb of some built in cupboarding in our cinema room and want to add some plant on rails/stiles to some flat MDF doors to make them match our study. Once planted on i will need to fill around the outside join before painting because there’s a small chamfer on the door edge, so what would you use to get a good fill that won’t shrink back?

The doors will be sanded back of old paint, some 3mm thick MDF rails/stiles glued on then filled, primed and re-painted in a much darker contrast paint than before.
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Re: Which filler?

Postby Robert » 01 Jun 2020, 13:34

I'm sure there are more specialised products out there but I'd just use an easy sand car filler. You can sand it half an hour after you've done it and it is pretty stable and has some flex to it.
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Re: Which filler?

Postby RogerS » 01 Jun 2020, 13:34

a thin bead of caulk. Anything else stands a good chance of cracking due to differential movement.
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Re: Which filler?

Postby RogerS » 01 Jun 2020, 13:35

Robert wrote:I'm sure there are more specialised products out there but I'd just use an easy sand car filler. You can sand it half an hour after you've done it and it is pretty stable and has some flex to it.


But if I understand where Trim is needing it, could be very hard to sand back.
If opportunity doesn't knock, build a door.
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Re: Which filler?

Postby TrimTheKing » 01 Jun 2020, 13:40

RogerS wrote:
Robert wrote:I'm sure there are more specialised products out there but I'd just use an easy sand car filler. You can sand it half an hour after you've done it and it is pretty stable and has some flex to it.


But if I understand where Trim is needing it, could be very hard to sand back.


Would be the outside edge of the doors.
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Re: Which filler?

Postby RogerS » 01 Jun 2020, 14:40

In that case, go with Robert's suggestion.
If opportunity doesn't knock, build a door.
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Re: Which filler?

Postby Woodster » 01 Jun 2020, 16:06

The wood filler I’ve got, looks and smells just like car body filler and has worked very well.
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Re: Which filler?

Postby TrimTheKing » 01 Jun 2020, 21:23

Thanks guys, Robert/Rob any particular product names please, so I get the right thing?
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Re: Which filler?

Postby RogerS » 01 Jun 2020, 21:27

TrimTheKing wrote:Thanks guys, Robert/Rob any particular product names please, so I get the right thing?


I use Isopon. You don;t get much in the tin tho' and if you've not used it before then go careful on the hardener otherwise it will go off before you draw breath !
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Re: Which filler?

Postby Robert » 01 Jun 2020, 22:17

I'm still using a tub I bought from toolstation a couple of years ago. Used some last week and still good. Ridiculously named 'Big Boy' body filler.

https://www.toolstation.com/big-boy-lig ... ler/p96113

Think they have upped the free delivery to £20 spend now. Not bought from them for a while now as screwfix is just up the road here.

As said above - don't mix a lot at once but do mix it well. when it starts to harden you have to abandon any that is unused.

Oh and you can usually thin it with meths if you want a more liquid paste but it will still go off fast with too much hardener.
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Re: Which filler?

Postby TrimTheKing » 01 Jun 2020, 23:36

Robert wrote:I'm still using a tub I bought from toolstation a couple of years ago. Used some last week and still good. Ridiculously named 'Big Boy' body filler.

https://www.toolstation.com/big-boy-lig ... ler/p96113

Think they have upped the free delivery to £20 spend now. Not bought from them for a while now as screwfix is just up the road here.

As said above - don't mix a lot at once but do mix it well. when it starts to harden you have to abandon any that is unused.

Oh and you can usually thin it with meths if you want a more liquid paste but it will still go off fast with too much hardener.


That’s the one I just ordered from Amazon! Different packaging but same description.
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Re: Which filler?

Postby MattS » 02 Jun 2020, 16:05

That's what I've used before to fill MDF, as others have said it goes off quick. Don't be tempted to use it when it's starting to harden, my experience is that it doesn't go on well and then the job of sanding is so much harder than the extra time to ditch the left overs and make a new lot.
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Re: Which filler?

Postby RogerS » 02 Jun 2020, 16:08

And you need some cellulose thinners to clean your tool. Especially if it's Big Boy :lol:
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Re: Which filler?

Postby Woodbloke » 02 Jun 2020, 21:18

Many years ago when I was working in the trade, the particular firm I was employed by (now long gone to the wall) made the vast majority of their output for Linley. As far as fillers were concerned, we used to use this stuff which one of the lads on the bench behind me used to call 'The Royal Filler' :lol: :lol: - Rob
I no longer work for Axminster Tools & Machinery.
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