Tom Gardner wrote:

"Karl Townsend" remove .NOT wrote in
message ink.net...
I'm building my latest contraption. Its a large metal plenum for directing
the air from an air blast sprayer down onto three rows of strawberries.
Think of an air duct for heating with three registers, only use a forty
horse power fan and very small openings.

I made the whole plenum out of sheets of 1/8" steel, and 1/8" round tubing
of different sizes. Its all tack welded together now. I'm going to finish
welding for strength this afternoon. I'll stitch weld with a three inch or
so gap between every one inch of weld.

I'll have yards and yard of places where the metal meets that I need to
seal. It needs to hold up to vibration and high air pressure. And be
paintable. What would you use?

Karl


There's a product that's like foil duct tape, check a heating/cooling supply
house. Here's a couple of links. This stuff is great!

http://www.hermanscentral.com/site/d...7048F82458EE5A

http://amconservationgroup.com/catalog.aspx?catid=169

I have used the heavy foil tape enough that I would not use it in a
vibration area.

I would look to acrylic or silicone caulk for something like this. More
likely acrylic, given the paint requirement, though you could use paint
that is color matched to the silicone, like white.

Cheers
Trevor Jones