No idea if you can buy it or not, but would using masking tape on carpet not be a better idea? Guaranteed to come up ok
Also, doesn't it only last for a minute or so? Once you've finished it, you'd have to start all over again.
Not as silly as it sounds you could do 10 layouts all taking a minute, take a photo of each & go to the pub and decide for an hour. With masking tape you'd still be there
As used in World Cup
Can you buy it ?
Want to plan my new office at home and it would be useful to be able to spray it on the carpet and walls ?
Would it come off the carpet ?
Also, doesn't it only last for a minute or so? Once you've finished it, you'd have to start all over again.
It is called Vanishing Spray, and it probably does what it says on the can.
Put down jumpers?
This.
It is a bit like asking where you can buy a ref's notebook so you can write a shopping list.