Abstract
Test methods have been developed to measure the release of asbestos fibers from the surfaces of a range of asbestos building products when subjected to an airstream (air erosion) or to light brush contact (brush erosion). The tests allowed discrimination of differences in fiber release from the products and assessment of the effectiveness of encapsulants in suppressing fiber release. Application of “good” encapsulants (by using tough binders and optimum application rates) reduced fiber release to very low or nondetectable levels for all products tested.