ASTM C772-03 (R2019) PDF Download

ASTM C772-03 (R2019) is a standard test method that is used to determine the oil migration or plasticizer bleed-out of preformed tape sealants. Preformed tape sealants are tacky, deformable solids that are used for sealing applications between two substrates. The purpose of this test method is to evaluate whether a preformed tape sealant exhibits oil or plasticizer migration, and if so, to what extent.

The test method involves subjecting the preformed tape sealant to specified conditions, such as elevated temperatures, and observing any oil migration or plasticizer bleed-out. The results are used to assess the performance and suitability of the sealant for its intended applications.

It is important to note that in some cases, a controlled amount of plasticizer migration may be desired to improve the penetration of the tape into porous substrates. However, in general, oil migration or excessive plasticizer bleed-out is not desirable, as it can affect the sealant's performance and longevity.

This standard test method provides a standardized procedure for evaluating the oil migration or plasticizer bleed-out of preformed tape sealants, allowing for consistent and comparable results. The values provided in this standard are stated in acceptable metric units, and any values given in parentheses are for informational purposes only. This standard test method does not have a similar ISO standard.