Waterproof Dominoes?

[Dibs-h]

Dominoes are available in beech which is what came in my assortment , but they are also available in a waterproof form (Sipo). In what instances would you want to use waterproof ones - garden furnture springs to mind but nothing else.

I suppose for windows\doors (as long as they were painted\etc.) normal beech ones would suffice?

 

[9fingers]

How well will various glues bond with waterproof dominoes?

If as I suspect, the answer is not very well, the domino becomes simply an alignment aid and as such requires a bigger void than a biscuit whilst providing minimal advantage over the latter.

Bob

 

[JanneKi]

Sipo is just a more water tolerant wood, it will still take glue and if in doubt, do not use PVAc but rather epoxy for example.

http://www.hobbithouseinc.com/personal/ ... s/sipo.htm

 

[Jake]

They aren't waterproof, they are just made out of more durable wood than the standard beech ones.

 

[ondablade]

It could be that the stock dominoes are not too bad with water anyway. I coincidentally tripped over this yesterday while having a dig about the possibility of cutting larger than stock mortices with a Domino:

http://www.onlinetoolreviews.com/review ... domino.htm

Quote:

'In an effort to find out how stable the Domino tenon is I submerged this tenon in a glass of water for about 15 hours. I measured its thickness before placing it in the water and it averaged 8.05mm. After 15 hours I removed it and measured it again, it measured 8.20mm on average. That is a growth of .15mm or .006". I'm not sure what this test proves or how I could equate 15 hours in water to the humidity in my shop but it does look to me that the tenon is dimensionally stable.'

As Nine is suggesting a 'waterproofed' domino might not be so good as any treatment like this would be likely to block wetting by water based adhesives, and hence the two basic mechanisms of adhesion - wetting, and penetration leading to mechanical interlocking.

 

[Mreagleeyes]

Interesting. I'm currently working on a garden Daybed for a client and have been looking at getting some Sipo Biscuits to replace the 'standard' issued ones.
I also feel the argument for the 'standard' dominos being able to swell slightly would give a better seal and stronger joint.

Has any one got any more info on this?.

 

[Jake]

It could be that the stock dominoes are not too bad with water anyway. I coincidentally tripped over this yesterday while having a dig about the possibility of cutting larger than stock mortices with a Domino:

http://www.onlinetoolreviews.com/review ... domino.htm

That tells you absolutely nothing about the durability of the domino in wet conditions, which is what the Sipo ones are for. Beech is very non-durable, it rots very easily.