How to Spec STEDAIR®
The following information provides wording to be used when specifying STEDAIR® moisture barriers for firefighting turnout gear.
STEDAIR® 3000 Moisture Barrier with Dupont Nomex® E-89 Spunlace
The STEDAIR® 3000 moisture barrier material shall be a 5 oz/yd2, two-layer laminate comprised of an enhanced bicomponent membrane and 2.7 oz/yd2 Nomex E-89 non woven substrate. The moisture barrier shall meet and exceed all requirements of NFPA 1971-2018 edition, which includes water and viral penetration resistance and common chemical penetration resistance while providing excellent total heat loss (THL) and thermal protective performance (TPP). The moisture barrier shall have a three-year warranty for materials and labor.
- The weight of the moisture barrier is 5.0 oz/yd2 +/-0.5 oz/yd2.
- STEDAIR® 3000 shall attain a total heat loss (THL) value averaging no less than 276 W/m2 when tested with PBI Matrix (SCI), 7.4 oz. PBI / Kevlar and Caldura SL2 thermal liner.
- The moisture barrier shall exhibit passing results after 10 wash/dry cycles at 140°F. The STEDAIR® 3000 retains all performance requirements as stated in NFPA 1971-2013 edition.
- STEDAIR® 3000 remains waterproof to a minimum of 1 psi after exposure to -40°F temperature.
- The moisture barrier shall attain an average thermal protective performance (TPP) of no less than 44.0 cal/cm2 when tested with PBI Matrix (SCI) 7.4oz. PBI / Kevlar and Caldura SL2 thermal liner.
STEDAIR® 4000 Moisture Barrier with Nomex® IIIA PJ
The STEDAIR® 4000 moisture barrier material shall be a 5.5oz/yd2 two layer laminate comprised of an enhanced bicomponent membrane and 3.2 ounce per square yard Nomex® IIIA woven pajama check substrate. The enhanced bicomponent membrane shall be comprised of an expanded PTFE (polytetrafluoroethylene) matrix having a continuous hydrophilic (water loving) and oliophobic (oil-hating) coating that is impregnated into the matrix. The moisture barrier shall meet and exceed all requirements of NFPA 1971-2018 edition, which includes water penetration resistance, viral penetration resistance, and common chemical penetration resistance and provides excellent total heat loss (THL) and thermal protective performance (TPP).
STEDAIR® 4000 is comprised of a textile substrate and an intimate bicomponent membrane incorporating expanded ePTFE with polyurethane. The polyurethane used in the STEDAIR® 4000 moisture barriers is different from the urethanes found in typical polyurethane-based moisture barriers. STEDAIR® 4000 possesses many features required by NFPA 1971 and provides higher total heat loss capability than comparable products in the market today.
STEDAIR® moisture barriers provide the greatest thermal stability of any moisture barrier available within the Fire Service industry today.
NB: The information here is for non-binding, general information purposes only. Information is supplied upon the condition that the persons receiving same will make their own determination as to its suitability for their purposes prior to use. In no event will Stedfast Inc. be responsible for damages of any nature whatsoever resulting from the use of or reliance upon information from this document or the products to which the information refers. Stedfast Inc. makes no representations or warranties as to the completeness or accuracy of the information.