Is Extramite OK for this?

[Jarviser]

I want to glue some 25x40 oak lippings to an 18mm veneered MDF dining table top using biscuit dowels. I was considering Extramite as I thought it would be stronger than PVA (I have used it in the leg mortise and tenon joints already where the forces are in shear).
I was concerned reading some threads that it may be rather brittle in this type of reinforced butt joint. Would I be better off using the good old white PVA? Whatever I use must be easy to wipe off, so I was worried about using PU on such a potentially messy joint.

If I were to use Extramite, I was surprised that they direct you to apply to only one surface. I have always worked glue into the fibres of both surfaces with a glue brush - is there a reason not to do this with Extramite?

Peter.

 

[Colin C]

You can use both ( not at the same time :roll: ) . it will be fine :wink:

 

[Steve Maskery]

Peter,
Yes, either will be just fine. If you are worried about glue-cleanup (and it can be a pain in this situation, DAMHIKT) you could consider giving the table top a coat of sanding sealer before you glue on the edging. That way it will be easier to clean off and won't spoil the veneer surface.

Cheers
Steve

 

[Jarviser]

Thanks Steve, Colin. I assume I am right putting it on both surfaces? I can't think why not, especially with biscuits involved.

 

[Steve Maskery]

To be honest, if it says just put it on one surface, why do you not believe them? :?

BTW make sure you measure out accurately. It makes a big difference.
S

 

[Jarviser]

To be honest, if it says just put it on one surface, why do you not believe them? :?

BTW make sure you measure out accurately. It makes a big difference.
S

I stopped trusting manufacturers when I turned 50 and became crotchetty!

Seriously, I can't see how the air pockets in the grain can possibly be purged properly on butt type joints where there is no sliding together on assembly. Every nerve in me says "get the fibres thoroughly wet".

Yes I agree about mixing. I use an electronic scale and a winemaker's measuring cylinder, 20 gm to 10ml.

Peter.

 

[Steve Maskery]

I stopped trusting manufacturers when I turned 50 and became crotchetty!

I'm not far behind!

Where did you get your electronic scales? We have some electronic kitchen scales, but they are nowhere near sensitive enough, they go in 2g increments, which is about half a tub of Extramite... I think you need to be able to measure to a tenth of that, don't you? I'd be interested to know.

Cheers
Steve

 

[Colin C]

Hi Jarviser,
If it comes you happy then put it on both but with me it depends on the job if I put it on both e.g both mortise and tenon, on the biscuits and joints but the edges I do one
I hope that will do

 

[Nick W]

Jarviser: For scales try UK Scales.

Colin C: I woudln't put glue on the biscuits, as they start to swell the moment you do, and may not go in the slots. Put the glue in the slots.

 

[Nick W]

Oops sorry, the scales bit was for Steve

 

[Jarviser]

Those scales that Nick put up seem very good value. Salters start at 40 quid in the shops.
I have had my scales for 15 years and they weigh to 2g also. I mix 20g of powder at a time, and half a tin is 60g, so I'm not quite sure what you meant Steve, unless you meant 2 ounces?

 

[Steve Maskery]

J
OK, I was exaggerating a bit. I just meant that it is difficult to weigh out small quantities accurately.

Nick, thanks for the link.

Cheers
Steve

 

[RickT]

http://www.maplin.co.uk/Module.aspx?Mod ... AQ&doy=8m3

Electronic Diet Control Scales Specifications:
Specifications:
Weighing capacity: 3kg/6.6lb
Resolution: 1g/0.1lb
Weighing unit: g, kg, oz, lb
Memory: Maximum 99 seconds
Operating temperature: 0°ree;C to 40°ree;C
Power: 4 x AA Alkaline batteries, supplied
Dimensions: 255x170x55mm
Weight: 800grams

 

[Steve Maskery]

I've just ordered one from UK Scales. Change out of £12 including delivery. Web orders only, though.
I hope it's as good as it looks.
Cheers
Steve

 

[Nick W]

I've had no problems with mine. Just don't be tempted to try the calibrate function unless you've got the required weight - once you start it will not go back into calibration without one. DAMHIKT.

 

[Jarviser]

I've just ordered one from UK Scales. Change out of £12 including delivery. Steve

They are certainly coming down in price. I got a new one on special offer from the local pharmacy chain for £7.99. Great for eBay selling too!

 

[Steve Maskery]

...and it arrived first thing this morning. Not bad all the way from Fife, thinks I.

Installed some batteries and... dead as a dodo. Doesn't even think about springing into life.

I'll let you know what their Customer Services is like...


Steve

Edit- Conversation:
Me: It doesn't work.
Bob: What's wrong with it?
Me: It doesn't power up and it rattles.
Bob: It should and it shouldn't. Post it back, we'll send you a replacement and refund your postage.

 

[Nick W]

Steve,

Hope the replacement arrives soon. I fell kind of guilty about this now.

 

[Steve Maskery]

Replacement arrived this morning. All is well. Furthermore, this one had been checked out before being sent - they left the batteries in.

So they sent the original order they day I ordered it, and dealt with the return in the same way. 10/10. Excellent.

Cheers
Steve

 

[Jarviser]

Great news, Steve. I am sure it will have loads of uses.
Some feedback on the veneered MDF table. I used Extramite on the 25 x 40 oak lippings and the job went well.The long sides of the table had 9 biscuits each so it was a reasonably big glue-up. I decided to pit a thin layer of Extramite on the mdf and a full coat on the oak lippings. I put glue in the slots but not on the biscuits. The adhesive definitely soaked right into the mdf so I feel justified in 'priming' it a tad. I did notice that unlike PVA there is no "grab" after a minute or so fiddling about with cramps, and I was able to tap it around with a rubber mallet and the Extramite didnt seem to object at all. PVA , especially with MDF, seems to set too quickly for big glue-ups, and if you need to move it to line things up it seems like you have broken a dry glue joint.
I will finish the WIP on my website soon.