Wicker aka pvc outdoor furniture

Sadly, one it is has gotten brittle it is most likely not salvagable. You could try bringing back to life with Armorall.

here is some info for you

https://www.youtube.com/watch?v=WIH-OlU5bb8

Here's a link with some repair ideas for you:

https://suggesthow.com/how-to-repair-plastic-wicker-furniture/

Easy 3-Step DIY Tutorial On How To Repair A Wicker Chair

https://krostrade.com/blog/how-to-repair-a-wicker-chair/

Although genuine wicker is Not the same material as resin look-alike wicker, damaged areas can be repaired using similar weaving techniques.

I would suggest repairing the damaged areas by weaving in narrow nylon webbing. Cut off the sharpest pieces of the damaged or loose resin plastic first (easier if you use a quality brand name scissors such as the Fiskars plastic cutters shown below).

Thread the nylon webbing through a large blunt bodkin, and 'sew' over and under the existing partial pieces to cover the area. This is not difficult but will take time and some patience. Pull through so that the webbing is tight, ensuring that each section is lying flat before you go next either under or over.

Nylon webbing is available in different widths, in a myriad of colors and is very durable. For use in repairing resin patio furniture, I would say that 1/2 inch would likely be most applicable.

Do not use the cotton/ polyester webbing as it is not water resistant and does not dry quickly; so is unsuitable for outdoor use. Webbing is most cost-efficient when purchased in larger bulk lengths.

https://www.strapworks.com/shop-by-product-type/webbing/nylon/flat-nylon

Thank you!

You will need to try and soak it with water and a little dish soap. (Dishsoap help it sink in). Ooh! Plastic!! You will need to replace it. Try the craft shop for supplies.

Maybe this will help: https://www.hunker.com/13404035/do-it-yourself-wicker-chair-repair

You might be able to paint your furniture to give it another year or two! The paint may help make it less brittle.

If the frame itself is still in good stable condition, then I would repair broken or brittle seating areas with the weaving tips above. The other thing you could do is spray the entire set and place thin plywood on areas where people sit with cushions over it. Again, this is only providing that the structure is sturdy.

Re: Homeroad's suggestion to paint: While painting the furniture may possibly help prevent the wicker from becoming more brittle, it will not rescue the sections that are already breaking or repair them.