| wdt_ID | Term – Definition |
|---|---|
| 1 | AAMA – American Architectural Manufacturers Association |
| 2 | Abrasion Resistance – the ability to resist being worn away by contact with another moving, abrasive surface, such as foot traffic, mechanical equipment, wind-blown particles, etc. |
| 3 | Absorption – the ability of a material to accept within its body, quantities of gases or liquid, such as moisture. |
| 4 | Accelerated Weathering – the exposure of a specimen to a specified test environment for a specified time with the intent of producing in a shorter time period, effects similar to actual weathering. |
| 5 | ACI – American Concrete Institute |
| 6 | Acid etch – in waterproofing, the use of a strong acid to remove the surface of concrete to expose the aggregate. |
| 7 | ACIL – American Council of Independent Laboratories |
| 8 | Acrylic coating – a liquid coating system based on an acrylic resin. Generally, a latex-based coating system that cures by air drying. |
| 9 | Acrylic resin – polymers of acrylic or methacrylic monomers. Often used as a latex base for coating systems. |
| 10 | Active metal (anodic) – a metal or material that readily gives up electrons to a cathodic (noble) material. (See anodic). An active metal will corrode in the presence of moisture when in contact with a cathodic metal. |