Certified Reference Material for ASTM G21 – Antifungal Test

Certify your test results today!

This product includes the world’s first Certified Reference Material (CRM) designed for use as a Test Control in performance of the standard ASTM G21-15 test method. Each unit consists of a sample set of both Treated (orange) and Untreated (beige) Test Controls, which are intended to guarantee the highest quality of antimicrobial method performance available and to verify proper ISO 17025 test performance.

CRMs are innovative reference standards developed from decades of antimicrobial testing expertise in the global market and are accredited to the ISO 17034 standard. This accreditation requires establishing Certified Values through ISO 17025 accredited method performance.

ASTM G21 is a standard, globally recognized, antifungal product test for determining the fungal resistance of plastics and polymeric materials. The method can be utilized to test the antifungal performance of many products, including textiles and foams.

For more information on the ASTM G21 standard, click here.

For answers to our most frequently asked questions, click here.

Product Performance

Representative images of ASTM G21 Certified Reference Materials before and after test.

Treated Control (Orange) & Untreated Control (White).

Certified Values of Available Products

Certified Values for this product are derived through a visual assessment of fungal growth on the test sample – Utilizing the scale defined in ASTM G21-15.

Scores may range from 0 to 4 on this scale, with a lower score indicating more antifungal performance.


Treated Test Controls

  • Score of 0
    • No observed fungal growth

Untreated Test Controls

  • Score of 4
    • Heavy fungal growth
    • 60% to complete coverage of the sample

Learn about all our Certified Reference Materials here.

Antimicrobial Product Tests

Antimicrobial Testing






JIS L 1902


Bulk Orders Available upon Request!