Demonstration/Validation of HAP-Free Seam Sealant Replacement for Use on Army Tents and Shelters

Report No. ARL-TR-6133
Authors: Faye R. Toulan; Claudia Quigley; Tom Larkham; Mary MacDonald; John J. La Scala
Date/Pages: September 2012; 56 pages
Abstract: Sealants are used by Soldiers in the field to repair holes and prevent rain leakage through tent seams, vehicle covers, and other shelters. The current product in use is Seam Grip (baseline), a solvent-based product that contains ~40% hazardous air pollutants (HAP). Three low-HAP or HAP-free alternative sealants (Seam Sure, Dynoseal-brown, and Dynoseal-clear) were evaluated with several shelter fabrics (cotton duck CCC-C-419G, Soldier Crew MIL-C-44423, Temper MIL-PRF-44103D, and Rip Stop nylon) as possible replacements for the current product. A demonstration/validation was conducted at the U.S. Army Natick Soldier Research, Development and Engineering Center, Natick, MA. Experiments included rain resistance, hydrostatic resistance and blocking resistance both before and after accelerated weathering. The HAP-free Dynoseal-clear out performed the baseline during rain resistance and hydrostatic resistance. While there were slight variations of performance on each shelter fabric, the overall average performance during hydrostatic resistance of each sealant was the same. Seam Grip (baseline) performed similarly to both Dynoseal HAP-free products during the Blocking Resistance test before weathering. However, after weathering, Dynoseal-clear exhibited a tackier surface. HAP-free Dynoseal-clear would be a suitable replacement for the current baseline Seam Grip, which would reduce HAP emissions by ~168 lb per year.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2012