Flowers that melt?

Cathy: maybe you should try a concrete mixture... no melting in the hot sun!

Try using a mortar mix, the stuff you would use for securing tiles

You didn’t include a picture but...Perhaps two-part epoxy would work for this job. There are epoxies that’ll work for glass, and some are made for high temperature applications. They also come in clear.

https://www.amazon.com/Araldite-ARA-400008-2-Tubes-Crystal-Epoxy/dp/B006JYQA82/ref=sr_1_13?crid=3QREHS6ZJACW0&dchild=1&keywords=high+temp+two+part+epoxy&qid=1595865564&sprefix=High+temp+two+part+%2Caps%2C-1&sr=8-13

Have you tried GE Silicone II in clear? That's the only one that adjust with the temps in my area. We were 105 last week, all my totems and dish flowers held perfectly for the 2nd year. They spent the winter outside also

Is there a way you could let them dry inside a cooled room that isn't being used or the basement?

Try loctite marine glue

I went to Napa car parts store and got silicone that holds rear view mirrors on.....heat doesn’t affect it.

One more to try is Aleene's Liquid Fusion: https://amzn.to/2EvYbZI It says it is UV resistant and many who have left comments like it better than E6000. I use it all the time!

Silicone will for sure work better

Maybe you should try an adhesive that is meant for the outside. Like a silicone adhesive made by GE might work. Its available on Amazon.

Silicone adhesive should hold in the heat.

Hi Cathy,

Yes Silicone adhesive used in Bathrooms and around UPVC Windows.

You need a weather resistant glue. Talk to someone at the paint desk in your local home improvement store.

Can you use hot glue from a hat glue gun?

Hi Cathy, JB weld is great! it is waterproof as well

I would use epoxy resin, the two part kind you mix for the job.