Patching Acrylic Weld On 40 or 16

[Wailua Boy]

I need to patch a tank with a center overflow. Whats is best to use? I've heard some conflicting ideas. Thanks

 

[jsodwi]

I use weld on 40 for everything

 

[predatorkeeper87]

40. 16 is essentially 4 with bits of acrylic laced into it, makes it garbage IMO.

whats the thickness of the acrylic? that will make a difference too.

 

[jam05pr]

If it's to patch a location that affects the tank's structural integrity, only use #40. None of the others can provide a stronger bond.

If it's simply cosmetic, you can use #4 or #16.