If you choose to use a carving knife use a gentle back and forth sawing motion and let the blade work through the sheet.
Best way to cut rubber sheets.
I used a straight two by four as a guide made the first cut as kind of a guide then just kept cutting getting a little.
Each of these methods has its own advantages and disadvantages.
Do not compress the foam and try to make quick cuts through the condensed foam.
After measuring for your space lay a straight edge along the section you want to cut to set your dimensions.
Lay the mat flat on the ground.
Number one is to lay out your part on stiff paper like butcher paper or a manila folder.
Follow these four steps on how to cut rubber for a nice clean cut.
Continue cutting along the same line until you make it all the way through the mat.
Before you cut foam always make sure your work surface is flat stable and won t be damaged by cutting through the foam with the knife.
Then using the straight edge mark the line where you will cut with your chalk.
And for a really large foam rubber piece a band saw or foam cutting saw is your ideal choice.
Four of the more commonly used neoprene cutting techniques by neoprene suppliers are die cutting laser cutting hydro jet cutting and hand cutting.
Then use the razor sharp blade to score the thick material using the straight edge as a guide.
If knife cutting use brand new single edge razor blades and be prepared to change them often.
If you cut thin foam rubber which has a thickness of around 1 inch or less you can make use of a utility knife.
Then cut that out to make a pattern then transfer that pattern by using a sencil brush and a bit of gray latex paint this works really well.
For thicker pieces of foam rubber which is more than 3 or 4 inches in thickness go for electric carving knife.