I've got and arm rest pad that the vinyl has shrunk on one side. Is there a product I can use to relax the fabric a little so I can re-glue. Thanks as always.

 

Light heating with a heat gun.

 

I have had some luck with Blue magic leather & vinyl conditioner & Blue Magic Vinyl cleaner at softening up older vinyls. I have heard saddle soap works as well, but i have never tried it.
A heat gun will help a little to soften it but you have to be careful not to over heat it. A garment steamer would be best as there no risk of melting the vinyl...

 

x2. Professional upholstery shops use these to soften, stretch and remove wrinkles.

 

Does this work on people too?

 

If it did it would put a lot of cosmetics companies outa binness!😏