On Wed, 18 Apr 2018 05:48:20 -0700 (PDT)
wrote:

On Wednesday, 18 April 2018 09:49:35 UTC+1, Harry Bloomfield wrote:
No, I no longer have the empty tube to help identify it. It is on a
painted surface, very well adhered and I need to remove it. Gentle
scrapping gets the thick off, but not the entire thickness. Is
there any solution which will loosen it please?

If it's not rigid it's silicone,

Unless it's acrylic ...