The mission of Microfiltration Gutter Products (MGP) is to eliminate the worst home maintenance chore imaginable and keep homeowners safely on the ground rather than climbing up wobbly ladders.  Who wouldn’t want free time without having to think about gutter cleaning? We keep on finding ways to make micromesh gutter guards even better.

About MGP

The inception of MGP began when Karen Sager, President, entered into an exclusive license agreement with Alex Higgenbotham for his patented technology in the filed of gutter guard microfiltration.  Karen recognized the value the patented technology would bring to an industry that suffered from products that failed to deliver what they were designed to.

MGP was launced in 2009 from Karen’s home in New Jersey as a single product, MasterShield.

Today, MGP is proud to offer the best gutter protection in the market with three gutter guard products, MasterShield, Klean Gutter & GutterLove, meeting all price points. With a growing dealer network, a seasoned sales & marketing team and an exclusive superior technology, MGP, led by the only female executive in the industry, is uniquely positioned to grow and dominate the industry.

In addition to having the rights to all current and future Higginbotham patents, Karen has patents pending for product improvements she has introduced into the MGP product line.

  • 2018

    MGP introduces copper into its MasterShield product. Copper breaks down oils, which leach from asphalt roofs, as well as organisms (moss, algae and lichen). This technology is patent pending.

  • 2017

    MGP identifies the need for a DIY product and launches GutterLove.

  • 2016

    MGP introduces high flow filters into its Klean Gutter product.

    MGP successfully asserts several of its patents against a competitor and now receives a license fee.

  • 2015

    MGP introduces corner pans to its product line which handle high volume water areas like roof valleys.

  • 2014

    MGP establishes its National Headquarters and consolidates its manufacturing facilities to Paterson, NJ.

  • 2013

    MGP recognizes the need for a lower price point product and launches Klean Gutter.

  • 2011

    MGP receives licenses to Higginbotham patents in MicroVortex technology and incorporates it into its MasterShield product. This key feature, which pulls water through the MasterShield gutter guard system at an angle, allows products to be pitched with the roof, improving the ability of MGP’s gutter guards to shed debris.

  • 2010

    MasterShield product is redesigned to improve interlocking panel feature.

  • 2009

    Karen Sager, President, launches MGP from her home in NJ with the production of a single product, MasterShield. MGP becomes the exclusive licensee for the Higginbotham patents and is the only company licensed to manufacture gutter guards with this exclusive technology.

  • 2001-2008

    A surgical-grade stainless steel microfilter is added to a gutter guard for the first time by Higginbotham.

  • 2001

    Alex Higginbotham is awarded his first gutter guard patent and has his first commercial success with LeafFilter® Gutter Protection, which was named to Building Product Magazine’s Annual Top 100 List for 2003 and 2004.

  • 1999

    Alex Higginbotham makes a fine screen work by preventing it from clogging with tiny debris or overshooting with water. When a fine microfilter is touched on the underside by a series of downward extensions, it does not just keep organic debris out of a gutter, but it also allows water to quickly flow through what looked like a sheer but solid surface.

  • 1990’s

    Frustrated by traditional gutter guards that just didn’t work, MGP’s inventor, Alex Higginbotham, begins experimenting with filtration systems.


Klean Gutter is a microfiltration gutter guard that’ll outperform most dealer installed systems!

Klean Gutter is designed for the contractor who doesn’t want to commit to the constraints of a dealer program.  You can get the technology benefits of gutter guards offered only by MGP through its exclusive license arrangement with Alex Higginbotham.

Rather than build it into a metal frame, we simplified the design and increased the water receiving area to the largest in the industry – 75% more than it’s direct competitors.  This costs a little more to do, but it’s worth it for it’s easy of installation and performance.

And we didn’t stop there: Klean Gutter is heatable.  Our patent pending heating methodology means one version of Klean Gutter can do it all.  It just makes sense not to complicate things with extra parts and supplies. Several other features of Klean Gutter are also patent pending.

If you sell any service related to roofing, gutters, landscaping, anything where homeowners ask you for a gutter guard, contact us about making Klean Gutter the product you recommend and install.