It might be tough to glue polypropylene, just found; Polypropylene Glue Spreaders for sale.
Polypropylene Glue Spreaders
If you're tired of using your finger to spread glue, then you will love these simple glue spreaders. We haven't found a glue that will stick to these polypropylene plastic sticks. Once the glue dries it can be removed with a flex of the spreader's blade.
Works with all types of woodworking glues including:
yellow glue
polyurethane
hide glue
epoxy
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I did read where a contact adhesive or silicone may work the best. I guess I've beat this one to death.
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