Which glue should I use for 3D printing?

The liquid one. pour it on. 
 

 

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When we print an object, not always get stable result. 
 
If we miss the moment our object start detaching from the bed, 
we will find our object dancing on the bed with free style. 
 

dancing on the bed

 
 
Adhesives are used for emergency treatment.
So which adhesive should you use?
 
 
1) Adhesion test
We want to know which glue have more power of adhesion. 
Let's compare the adhesive strength with the filament attached to the bed,

1) melted filament, 2) liquid glue, 3) hard glue. 
the final winner was a hard glue. 
 

hard glue adhesion

 

adhesion of filament

comparision of adhesion of liquid and hard glue

 
 
 
2) Practically, treatment in the middle of printing. 
 
But the problem is that it happens at unexpected moments, while printing.
After paused the printing, there is no way to put a hard adhesive between the object and the bed.
So, practically, we will use liquid glue. 
 
However, it does not guarantee that our model will be attached to the bed firmly.
because, filament melted one has better adhesion. 
but if we pour it. it will help. 
 
2-1) We used liquid glue. 
 
The model completed printing, but the adhesive did not work to stick the object to the bed.
 

applied liquid glue

the glue even detached from the bed

 
2-2) We pour liquid glue. 
the emergency situation occured again. 
this time we poured the glue. with no mercy.
 

 
 
The adhesive is still attached to the bed.

while the glue is drying it is also detaching from the bed. 
but with enough glue they created one kind of support with other generated support.  

 
 
printing completed.

 

 
 
We get successful result with using liquid glue pouring on the bed. 
that glue created another support for the object. 
 
In this printing I didn't pause the printing. 
I applied the glue while the printing is on going. 
 
but if you want more certain process, move and check step by step. 
1) pause the printing, 
2) and apply glue like pouring glue. 
3) and wait until it dry. 
4) and resume printing. 
 
5) enjoy and be happy.