Skip to main content
FR K-style image
FR k-style 4 image
FR k-style 5 image
FR k-style 6 image
FR cut away logo
FR cut away logo
mosquito logo

GutterStuff® FR K-Style

Regular price $14.91 $0.00


GutterStuff® FR is an easy, self-installed gutter guard that is both affordable and invisible and eliminates dangerous and dirty gutter cleaning. GutterStuff® FR seals out leaves and allows large volumes of water to flow through quickly. No other gutter cover, gutter screen or gutter guard system works as effectively or as economically to keep debris from entering your roof gutters. GutterStuff® FR is made from durable polyether outdoor foam that is lightweight and will not dent, bend, crumble, or lose its shape.


  • Available in 4", 5", 6" (width of gutter)
  • Sold in four linear feet increments.
  • This is the perfect solution for those do-it-yourselfers that want the highest quality gutter protection system at an affordable price.
  • Invisible; fits completely inside the gutter
  • Prevents mosquitoes from breeding in the gutter since there is no standing water from clogged gutters.
  • Ultra Violet (UV) protection from the sun.
  • Germicide protection to prevent the growth of moss.
  • Extra surface coating includes fire retardant compound.
  • GutterStuff® FR is backed by a 25 year warranty.
  • GET THE BEST PRODUCT AVAILABLE – If you want additional protection for a superior, longer-lasting product, consider ordering Class A Fire Rated GutterStuff® PRO FR PLUS

California Prop 65 Warning: This product may expose you to chemicals including Styrene, which are known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to

More from this collection

Customer Reviews

Based on 13 reviews
Brian Ladman
What I expected

I have used a similar product in older 5” gutters and they exceeded my expectations so when I replaced gutters with a 6” gutter I knew I needed new foam. Shipping was acceptable. The product installed as expected. I feel like the pricing is a bit high for foam but it is up to you as whether you see the value. Much cheaper than gutter helmets and they work so I think so. I expect long life out of these inserts…….only time will tell.

Mike Giordano

Installed it myself- best solution for the price.

Great service from Gutterstuff!

Ordered significant quantity of product from Gutterstuff - good price, easy to order. Part of shipment was missing; however, Gutterstuff corrected the error quickly and without question. Thank you for your personalized service!

Arthur Eddy

I searched everywhere looking for replacement for decades old foam filters. I ordered online, days later I received a tightly wrapped package. I opened the package, measured the area, cut it with a utility knife. Perfect! Fast, convenient, easy and light to handle, affordable. It was perfect, I would highly recommend. No surprises.

E. E. Mitchamore
GutterStuff is Good Stuff

This was our second batch of GutterStuff, replacing a set about 15 years old. Most of the old stuff was still in good condition but loaded with debris that couldn’t be shaken out. The real test of effectiveness was shown by the rainwater tank flush and filter. Very little debris made it into the rainwater tanks.



Sold Out