I have large 24" diameter 'foam' decorative planter that has cracked. I love the look of it and because it is styled in an old world style and I don't even care if the crack shows after repair.

There are so many sealants on the market that I don't know where to begin. I thought of using a cement-like substance because the crack is now pretty wide...but really have no idea. It is stable and does not appear to be in danger of further cracking.

Any suggestions or recommendations? Thanks!

I don't think that there is a permanent fix that would end up holding.

You can't brace it from the inside with a metal or wood bracket fastened with screws. It is foam, it would not hold. So if you seal the crack with something, it would not be able to stand up to the stress.
If you tried to empty it and glue it say, quite a few glues act like solvents and melt the foam.
Cement is not going to adhere to foam in my opinion.

Hi @BigBill Thanks for the quick reply! The pot is already empty and I agree with you about the foam melting with many types of adhesive. I'll need to check on the specifics of the glues.

I'm just hoping someone has already had this problem and found a solution that worked.

Any chance of a photo of the crack?
I have a 25" diameter ceramic pot that had a crack towards the bottom and was afraid of further damage. Because of weight of ceramic we had to wire the parts involved to help keep in place.
With your, what I assume lighter in weight, foam pot, maybe gluing with appropriate adhesive Is enough but if theres a widening separation then maybe a wiring job may be called for.
We had to use heavier plastic covered wire to do the job but lighter wire may be good enough for your pot

@webesemps
I'd love to send a photo. But I have been having difficulty transferring photos from my phone. If I have time this weekend I might be able to get out an actual camera then I could upload the sd card into my laptop.

The crack was there a couple of years ago without incident (meaning it held the soil), and when I moved here from California, I emptied the pot and moved it here too. I'd like to use it this year, and that is why I'd like to repair it now.

Wiring is definitely a possibility, and will do it becomes necessary.

Sad to lose a favorite planter.
You're really fighting physics though. The pressure to crack comes from inside, so the best structure to hold that, I think, is on the outside. Where it will show, boo.
Maybe best find a cheap pot for inside to hold the dirt away from the crack.

Holes were drilled in both parts involved and wire was threaded through both pieces to help them stay attached

@webesemps Bev, that is really interesting! Not at all what I was envisioning, but definitely a consideration. Since the crack is only on one side, I could turn that side away from view.

Good luck with whatever you do!

I have repaired pots with epoxy and wire mesh on the inside. Fill the crack with glue and brace it into shape, wipe off excess. Put mesh flush on the inside over the crack and coat with glue.

Mine was a large ceramic pot, but the concept should hold with a foam pot as long as you get a thick glue that won't melt the material.

@sumire
Another great idea!