ASTM E96/E96M
Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials
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About This Item
ASTM E96/E96M is the ASTM standard for the gravimetric determination of water vapor transmission rate of materials. It provides a practical framework for measuring how much water vapor passes through a material over time, which is important when evaluating barrier performance and product behavior. For manufacturers, laboratories, and specifiers, this standard helps support consistent testing and clearer comparison of material properties across different applications and conditions.
Purpose of ASTM E96/E96M
The purpose of ASTM E96/E96M is to define test methods for determining water vapor transmission rate using a gravimetric approach. The standard is commonly used to compare how materials respond to moisture exposure and to support technical decisions based on measured transmission behavior. As a published ASTM standard, it helps establish a repeatable basis for laboratory testing, data reporting, and product evaluation when moisture permeance is an important performance factor.
Common use cases of ASTM E96/E96M
ASTM E96/E96M is commonly used when evaluating sheet materials, barriers, membranes, coatings, and other products where water vapor movement may affect performance. It is relevant in testing workflows that compare material samples, verify product data, or support design and procurement decisions. Laboratories and quality teams may rely on it to measure vapor transmission consistently and to document results for technical review or compliance-related purposes.
Why ASTM E96/E96M matters
This standard matters because water vapor transmission can influence durability, comfort, protection, and overall material performance. ASTM E96/E96M helps reduce uncertainty by giving users a common test method for comparing results across products and suppliers. That consistency is valuable for quality control, specification writing, and procurement, especially when moisture control is part of performance requirements. It also supports better risk reduction by making material evaluation more objective and repeatable.
- Gravimetric water vapor transmission testing
- Material comparison and performance evaluation
- Laboratory reporting and data consistency
- Moisture barrier and permeance assessment
- Quality control and specification support
- Publication Date: 2024-11-20
- Publisher: ASTM
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