Product Technical Guides : US-EN Firestop Systems Guide For Specifiers | Page 5

Hilti Firestop
MOLD AND
MILDEW
RESISTANT
SOLUTIONS
Firestop Systems Guide
HILTI FIRESTOP AND CONSTRUCTION CHEMICAL PRODUCTS
WITH ASTM-G21 ZERO GROWTH RATING
CP 643N
CP 644
CP 648-E
CP 648-S
CP 653
CP 675T
CP 680-P
CP 680-M
CF 812
CFS-BL
CFS-CC
CFS-DID
CFS-PL
CFS-SL GP
CFS-SL SK
CFS-SK RK
CFS-SP WB
CFS-T
FS-ONE MAX
CFS-TTS
CS-TTS SA
CFS-D 1”
CS-SL SA
CP 605
CFS-S SIL GG
CFS-S SIL SL
CP 506
CP 572
CP 606
CP 617
CP 618
CP 620
CP 637
The test method used to determine the effect of fungi on materials is ASTM G-21 “Determining
Resistance of Synthetic Polymeric Materials to Fungi”. Test is conducted by placing a sample
of material on a surface of agar and sprayed with fungi spore. The sample is then covered and
incubated at 82 to 86°F (28 to 30°C) and not less then a 85% relative humidity for minimum 28
days. The only potential nutrient is the sample itself. If the sample is not attacked by fungi then
the material is considered mold and mildew resistant. The material is then given a rating of 0, 1,
2, 3 or 4 with 0 being the best.
In order to better serve our customers, Hilti subjects all of its firestop and construction
chemical products to the ASTM G-21 test.
Testing for Mold Resistance
The above listed Hilti products have received an ASTM G-21 rating of 0. Hilti firestop and
chemical construction products not listed here have been tested for ASTM G21, many of them
receiving an ASTM G-21 rating of 1. A rating of 1 represents a significantly small amount of
growth (less than 10%) and is generally considered mold and mildew resistant.
Please ask your local Hilti representative for more information.
Hilti Firestop
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