Isn't the internet wonderful notwithstanding it brings the negative with the positive. But here I am in Wellington NZ ( originally from Melbourne) and have had contact with Nth Carolina and now Manchester. I think with these products it comes down to what they are needed for. Where possible I use Command strips.It was just that my son brought home a discarded pack of a slab of UBL white tack and it prompted my musing of difference between blue and white. The only thing I could think of was that blue would last longer as an attractive colour than white which would soon look dirty. Might also come down to brand quality. However I found a use for a tiny bit of the white stuff last night. Had tried to remove sticky stuff off the back of a greeting card with a rubber and also with Dissolve It. Only made small impact then had thought that blue tack is used to remove it's own residue so pulled off tiny bit of white tack, moulded it around then ran it back and forth over the sticky stuff on card and Bob's your uncle. Gone. Satisfaction.
I quite like sticky-backed velcro strips however there are places they can't be used but I know where to come if I need more info !
I find velcro so much stronger than blue tack and you can use it anywhere.
There's some small bits on the back corners of this dust cover to stop it sliding off with the draught from the door when it's opened.
it keeps the cables in their protective cover attached to the skirting.
Even a small bit keeps the switch for my tall reading lamp attached to the window frame.
If the use is no longer necessary it can all be removed. I fInd that blue tack over time, loses its adhesive qualites.