Bendable plywood-mdf combination.

[R-Carpenter]

Just want to let you know guys, Neat Flex is fantastic. I order a couple of pieces for a job and it’s a timesaver. Great stuff for DIYs that are looking for exotic forms.
http://www.neatconcepts.com/

[dhaen]

Thanks for the tip

Seems to be available from B&Q in the UK, though not all stores.

[John L]

What it is is "kerf" cut lumber. I do it whenever I need to go around corners with my clients jobs when they come up. But I do it on my table saw. Fortunately, my vacuum system picks up almost all the dawdust.

But is it worth buying? How much does the stuff cost?

[R-Carpenter]

In US it cost about $120 for a 19mm 4x8. It’s a good deal for me because I am not looking to do 1000000 kerf cuts on the table saw. Uniformity of the bend is very good and as you noticed the outside is birch ply, which makes veneering a bliss.

[MJL21193]

Originally posted by John L

But is it worth buying? How much does the stuff cost?

Originally posted by R-Carpenter
In US it cost about $120 for a 19mm 4x8. It’s a good deal for me because I am not looking to do 1000000 kerf cuts on the table saw. Uniformity of the bend is very good and as you noticed the outside is birch ply, which makes veneering a bliss.

The outside plywood layer is 5 really thin laminations, making the bend much smoother on the ouside. Avoids that "segmented" look you'll get with kerf cut regular plywood.

Saves a ship load of work on a big project too.

Nice find Roman.

[quickshift]

It's good stuff

I used it to form the outer skin of the last speakers I built.

[quickshift]

And the outside..

[John L]

So,......what did you use to fill in the "kerf" cuts?

As it is, the wall is so thin that it will resonate easily. Remember, we are trying to acheive a sound dead enclosure here. How do you plan to deaden the walls?

[R-Carpenter]

I don’t think you have to fill them in. A smooth surface will produce a reflection-standing wave. Kerf cuts may actually work as traps. In any event, you can sandwich this material to itself (cut side to cut side) and have your smooth surface. You could also sandwich 2 pieces with an extra piece of wiggleboard in between. Sandwiching different densities and thickness will quite down resonance of the walls significantly.

[MJL21193]

Originally posted by John L
So,......what did you use to fill in the "kerf" cuts?

When I've used kerf cuts before (not for speakers), I ran beads of construction adhesive across and into the cuts to create points where it's solidly glued.

No need to completely fill IMO.

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