No, you can't. It would peel off like sunburned skin, if it ever even set up. And why in the world would you want to do that anyway?
Yes you can;
http://www.nauticexpo.com/prod/polyflor-voyager-flooring/vinyl-floor-coverings-for-ship-31432-193520.html
Yes you can, however, ensure that this is the best option before executing. I do this to reinforce the self-stick vinyl tile and laminate flooring in my basement and it works great. I got tired of dropping a knife or something creating a huge gash requiring replacement. The polyurethane layer has protected my floors for years. Occasional reapplication of polyurethane in spots where needed making it look new brand new again versus cutting out and re-sticking a piece of the laminate floor that will never look as good as new...I use the former. There are a lot of nay-sayers out there about polyurethane on vinyl tiles and laminate floors, but I've always had great success.
If the vinyl is down tight , the answer is YES, Laminate con go over it
Vinyl.
That would depend on whether they are ceramic tiles or more vinyl tiles.
Answer from Choices (http://www.choicesflooring.com.au/vinyl/) Generally, cushion vinyl is laid loosely so any imperfections in the floor don't show through over time. It can also be glued down, but the flooring needs to be completely level. Vinyl tiles or planks are glued down so the surface needs to be completely level, which is done by applying a self- leveler to the floor if required.
Yes, polyurethane can effectively fill cracks in a wood floor.
No, you should not.
Yes you can, however, ensure that this is the best option before executing. I do this to reinforce the self-stick vinyl tile and laminate flooring in my basement and it works great. I got tired of dropping a knife or something creating a huge gash requiring replacement. The polyurethane layer has protected my floors for years. Occasional reapplication of polyurethane in spots where needed making it look new brand new again versus cutting out and re-sticking a piece of the laminate floor that will never look as good as new...I use the former. There are a lot of nay-sayers out there about polyurethane on vinyl tiles and laminate floors, but I've always had great success.
What is the weight of Vinyl Floor tiles per m2
dampen a rag with lighter fluid or mineral spirits. no you wont remove the polyurethane, its dry. but it will however remove the glue with no problem or blemishes in your poly.
Vinyl floor covering.
The amount of polyurethane needed for optimal protection and durability of a floor depends on the type of floor and the manufacturer's recommendations. It is generally recommended to apply 2-3 coats of polyurethane for best results.
You might want to check the manufacturer's labels which often state whether you can use a product on a vinyl floor. You can use SC Johnson Wax Tile and Vinyl Floor Cleaner and Pledge Tile and Vinyl Floor Cleaner.
No, in fact the wax can ruin the polyurethane finish. Clean the floor with a good wood floor cleaner. Do not mop with water.
Polyurethane applied to a floor is virtually never sprayed. It is generally applied with an absorbent pad, frequently made of wool or a synthetic.
Normally a low density Polyurethane (foam) covered in vinyl.
Yes, you can.