I need a fabric stiffener that is weather resistant. Any ideas?

Polyurethane might work for you.

Elmers Glue! The recipe is 1 part glue to 2 parts water. Mix together thoroughly. Have fun :)

What if you tried just spraying a matte clear coat on it, that would weather proof it too

https://www.wayfair.ca/baby-kids/hd0/11oz-spray-l2555-k~oix1966.html?refid=GX114558807430-OIX1966&device=c&ptid=173397507200&targetid=aud-404117501957pla-173397507200&network=g&gclid=CjwKCAjwns_bBRBCEiwA7AVGHgZMxtXFI13OL89oP6ar3vf4nCien3HX2v1UGblreIPnHHgT7T5BYRoCR7AQAvD_BwE

how about mod podge?

Perhaps there's something here that will help: https://www.youtube.com/results?search_query=weather+resistant+fabric+stiffener

Hi. Brush on polyurethane. It will stiffen and waterproof too. Good luck!

Hi Gina - I don't know the answer to help, but I wanted to stop by and say how much I love your wreath! Hugs, Holly

https://www.wikihow.com/Waterproof-Fabric

I would think that a spray poly would work.

How about using liquid starch like the kind you find at Joanne Fabrics or Michael’s. Then you could spray the whole thing down with silicone water proof. I buy the heavy duty stuff that hunters use on their tents and bags. You can find it in the sports department at Walmart. I believe it’s next to the fishing and camping supplies. I spray my outdoor craft decor down after each season. Most of my things still look fantastic even after 15 years. Good luck with your beautiful wreath.

I would say that the source of your problem with the fabric knots on the wreath being too limp, is the fabric itself. This fabric is just too thin, and the weave is not dense enough for the fibres to absorb and retain the starch.

Also, for optimal fullness on this style of wreath, the fabric strips should be double thickness before being knotted. That way, once tied in place the two layers can be pulled and fluffed out. Fold the 'neck portion as narrow as possible, and squinch as many strips on the circle as you can fit. I would say from this picture, that you do not have enough strips and they are not close enough together.

Did anything work?

Powertex is expensive but would work and applied correctly is weatherproof.

Did you find something that works ?

This is what Amazon carries concerning that:

https://www.amazon.com/Odif-Usa-8-68oz-OdiCoat-Waterproof/dp/B0785TGLZY/ref=sr_1_4?dchild=1&keywords=waterproof+fabric+stiffener&qid=1604943287&sr=8-4