joining plaster

[belg]

what would be the best method to join small sections of plaster together at 90 and 45 degree angles with no ability to clamp them?

thanks
Pat

 

[Vic]

Pat, If the pieces have smooth edges and some flat surface plain old white glue will stick plaster together just fine. Its got enough water in it to penetrate the plaster a bit so the pieces will bond.

If you want the edges to pull tight together try using some DUCCO cement (a kind of glue). It has a property that it shrinks as it dries and will sorta pull the pieces into each other. However the bond won't be as strong.

 

[Fred_M]

While both those methods work fine, they will prevent waterbased washes from coloring the plaster if you are messy and get any on the surface. They also don't fill gaps. The not so seceret way is to use splackling compound as glue. Just wet the plaster surfaces to be joined with your finger, apply spackling puttey, assemble, and wait. When done you can trim, sand, whatever the joint and it takes washes...The spackling coumpound is also thick and stiff enough that no clamping is required. I always broke plaster if I tried to clamp it anyway. Oh, the cheapest spackles work better than the newer vinyl ones at taking color. Dash10

 

[jim currie]

if joining casting plaster i just ruff and wet edges and use more casting plasted .