• We are currently upgrading MFK. thanks! -neo

Weld-on #40 and #42

Hey thanks,
That will really speed up, and simplify the build.

What I am doing is taking an old 48L x 24 Hx 18 W 90 gallon tank, and converting it into a 48Lx 18H x 24W.
Bond a 48 x 18 sheet on the top and laying it on its side. It will be divided into 4 main compartments for holding fry, and grow outs. With cut outs on top to hold 3 2 gallon mini tanks.



It will set on a 1.5 " steel frame of 48" x 24".
 
20180928_180136.jpg 20180928_180156.jpg
10 day of soaking "Acylic " chips in acetone to make some glue. To tack together my project.

I think my sheet of acrylic is probably polycarbonate.

My gallon of weld on 40 arrived, soaking wet and 50F.

It's going to a slow build. With a space heater.
 
20181006_111815.jpg
My edge corner pours are all crystal clear.
The tank is 3/8" acrylic, at 24" tall. I think the weld on brought out the surface crazing already present in the old acrylic.

The crazed seam is on a baffle in the center of the tank, were it would be flexing the most.

Would fire annealing help at all maybe prior to glueing?
 
Hello!

-It is necessary to sand before gluing?
-I need to close an opening of 0,1inch (2,54mm), the viscosity would be thick enough to cover that crack?

Thank you!
 
jua123 said:
Hello!

-It is necessary to sand before gluing?
-I need to close an opening of 0,1inch (2,54mm), the viscosity would be thick enough to cover that crack?

Thank you!
Click to expand...

My polycarbonate had an antiscratch / anti glare coating. The other tank was very old with mineral deposits. So I sanded as insurance, but not required on good materials.

The 2.5 mm gap should not be an issues, just use masking tape on the back side.
 
wednesday13 ~ I bought a pint of 40 and last night looking at my 8' long tank it seems like it would take the majority if not all of it for one 8' joint. does that seem correct to you?
 
Hello!

I have used Weldon 42 and it is a marvelous tool for gluing acrylic, but I needed to introduce some steel screws and paste them, the question that I throw is,

-I have used Weldon 42 for gluing steel with methacrylate, making encapsulated type, attached photos ,,, I have tried other type 3M adhesives, in question the model "DP8405NS" for steel and plastics but at the minimum strength loses the adherence ,,, Do you have any idea to glue the steel screws to the methacrylate better than to encapsulate it like in the photo?

Thank you!!!!!

Aquarium1.jpg Aquarium2.jpg
 
I used weld on 40, same stuff just in a can.
I would drill the hole slightly large and bond the threaded area of the bolt.

Kind of like setting bolts in concrete. With epoxy grout.
 
markstrimaran said:
I used weld on 40, same stuff just in a can.
I would drill the hole slightly large and bond the threaded area of the bolt.

Kind of like setting bolts in concrete. With epoxy grout.
Click to expand...



Is there any difference between Weldon 40 and 42? When the 42 hits the metal creates many bubbles, I guess this is normal because in metal does not create any adhesion.

Thank you!
 
You must log in or register to reply here.
Back
Top