Downloadable Files

Download Printable Brochure


 American Excelsior Company is the inventor of biodegradable erosion blankets. American Excelsior Company’s dedication to innovation has lead to the industry’s very first 100% biodegradable erosion blanket. Developed in 2003, Curlex NetFree excelsior blankets are specifically designed to actually promote ideal growing conditions for grass seed, while simultaneously protecting topsoil from wind and water erosion without the use of polypropylene netting on the top or bottom of the blanket. While maintaining all the benefits of the industry-standard Curlex® excelsior blanket, Curlex NetFree offers a solution that eliminates the fear of plastic or jute netting getting caught up in moving activities or animals becoming entrapped in environmentally sensitive job sites.  Curlex is considered the industry standard by many because of the plethora of Curlex Features and Benefits.

Material Characteristics

Curlex_Curls_and_Barbs_(American_Excelsior_Company)_medium netfree_8netfree_7

Curlex blankets consist of unique softly barbed, interlocking, curled, Great Lakes Aspen excelsior wood fibers. They are naturally seedfree. Curlex NetFree is a 100% biodegradable erosion blanket. Using the unique interlocking, curled, Great Lakes Aspen excelsior wood fibers stitched together with a 100% biodegradable thread allows the blanket to be manufactured without the use of plastic or jute nettings. Depending on job site requirements, the Curlex NetFree blanket can bring a higher performance characteristic to your job site over conventional mulch mats, blown straw with plastic netting, or other single net straight fiber blankets. Curlex NetFree excelsior blankets are available individually wrapped or in master packs to allow for mechanical unloading and stacking.

Performance Capabilities

Netting Type NONE
Slopes ≤ 3H:1V
Shear Stress> 48 Pa (1.0 lb/ft2)



Curlex NetFree ASTM D6459 Test
Curlex NetFree ASTM D6460 Test

Typical Applications

  • All Mowing Activities
  • Golf Course Construction
  • Environmentally Sensitive Areas
  • Residential Development
  • Commercial Development
  • Highway Construction
  • Urban Drainage
  • Slope Stabilization

Curlex NetFree Case Studiesnetfree_4

Curlex NetFree

A 100% biodegradable erosion blanket manufactured with an engineered cut of Great Lakes Aspen excelsior wood fiber. The wood fiber shall consist of 80% six-inch or greater in length. The blanket shall be of a consistent thickness, with fibers evenly distributed throughout the entire area of the blanket creating a mat with no voids in material. The blanket shall be manufactured using a 100% biodegradable stitch material to form the continuous matrix of Curlex fibers. The blanket shall be naturally seed-free and not contain any foreign weed seed, chemical additives, tackifiers, or paper products that could hinder grass growth, establish unwanted evasive weed species or shorten necessary erosion protection time periods. The blanket performance shall be supported by an ASTM protocol test result.

netfree_3Benefits of Curlex NetFree

  • No more entrapment of wildlife and pets
  • No more netting tangled in mowing equipment
  • No more worries about future environmental risks; Curlex NetFree is 100% biodegradable
  • No more tripping on netting
  • No more waiting for netting to decomposenetfree_5

Curlex NetFree TechNote

Suggested Specifications

netfree_6Curlex NetFree blankets shall be made from 100% Great Lakes Aspen Excelsior. The fibers shall be made into blanket form without the aid of any netting. Curlex NetFree fibers shall be of consistent thickness and evenly distributed throughout the blanket. Curlex NetFree shall be a 100% biodegradable erosion control blanket.

Roll Dimensions 8.0 ft x 90.0 ft (2.4 m x 27.4 m)
Roll Area 80.0 yd2 (66.9 m2)
Unit Weight* .73 lb/yd2 (0.40 kg/m2) ± 10%
Netting Options No Netting






*Weight is based on a dry fiber basis at the time of manufacture. Baseline moisture content of Great Lakes Aspen excelsior is 22%.


Technical Support

Visit our Technical Support Library to view all Technical Support Documents by clicking on Technical Support at the top of any page or please Contact Us if you have further questions.

Disclaimer: Curlex NetFree is a system for erosion control and re-vegetation on slopes and channels. American Excelsior Company (AEC) believes that the information contained herein to be reliable and accurate for use in erosion control and re-vegetation applications. However, since physical conditions vary from job site to job site and even within a given job site, AEC makes no performance guarantees and assumes no obligation or liability for the reliability or accuracy of information contained herein for the results, safety or suitability of using Curlex NetFree, or for damages occurring in connection with the installation of any erosion control product whether or not made by AEC or its affiliates, except as separately and specifically made in writing.