IMPRESA Glass Cutting Oil - Precision Twist Top for Extended Tool Life & Clean Cuts - Versatile Fluid for Stained Glass, Bottle Cutter & Mirror Cutting - 4 Oz, Black

That is not optional if you want a clean cut. Works really good.

I am new to stained glass and was struggling to cut my glass easily without breaking my glass incorrectly. This oil is a game changer. It’s easy to use. It’s a big bottle so it will last you a long time. Since using this my glass cutting is now flawless. I highly recommend.

Oil works for what its designed to do. Lube scoring wheel on glass cutter.

Love this product!! Makes cutting glass smooth and easy. You only need a very little bit with each use, which means this product lasts forever and is worth the money. Allows me to cut seamlessly and only have to do a little bit of grinding!

I go thru a lot of it in my studio with various straight edge and circle cutters.

This oil was critical for cutting cathedral glass smoothly with a circle cutter. Highly recommend for all glass cutting.

Very happy with product

Does w work as should makes everything oily

Not sure if the quality of the oil or quality of the knife is the most important but regardless, people recommend to use oil to lubricate the knife when cutting glass so that's what I did. Didn't face any issue.

Facile à utiliser Donne de très bons résultats

I used it to cut a huge mirror for the wife and it worked but it could be a bit thinner or it might have been my glass cutter wasn't dispensing the oil enough. Either way it cut the mirror. The cap did break when I was tightening it

just what I wanted.

Good quality product