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Insulation Cutting Performance
Customers have mixed opinions on the insulation cutting performance of the Red Devil 4609 Batting Knife. While some users report effective cutting of fiberglass insulation batts, others mention difficulties with batted insulation that has a paper cover and even report blade breakage when using it for spray foam insulation.
Blade Sharpness
Some customers have reported that the blade of the Red Devil 4609 Batting Knife maintains its sharpness well, while others have found it to be not sharp at all upon arrival and some even experienced the blade snapping easily after light use.
Highlights
Quality
Great for armaflex work and making nice mitered elbows
This batting knife works very well at cutting fiberglass insulation batts.
Makes cutting and installing insulation so much easier and faster
I kept forgetting them on jobs sites or just losing it but i’ve had this 3rd one for a while now and it’s works pretty good, mi... Read More
Competitiveness
A little more expensive than the competition but overall a good quality product with some upside for professional installers.
Overview
- How are reviewers describing this item?
sharp, cut and good. - Our engine has profiled the reviewer patterns and has determined that there is minimal deception involved.
- Our engine has discovered that over 90% high quality reviews are present.
- This product had a total of 375 reviews as of our last analysis date on Mar 16 2025.
Helpful InsightsBETA
Posted by a reviewer on Amazon
One could easily injure themselves or the knife could get dull rattling around in your tool box
Posted by a reviewer on Amazon
Slices unfaced like butter all day
Posted by a reviewer on Amazon
Makes cutting and installing insulation so much easier and faster
Posted by a reviewer on Amazon
You should get this tool if you plan to do any insulation
Posted by a reviewer on Amazon
Cuts like butter and you don’t have to worry about a regular box cutter snagging and tearing your insulation
Posted by a reviewer on Amazon
Knife works great but definitely needs a sheath
Posted by a reviewer on Amazon
Found a 834 bread knife sheath that fits perfectly for a couple bucks shipped
Review Count History
Price History
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