ASTM C736 Standard Test Method for Extension-Recovery and Adhesion of Latex Sealants

ASTM C736 covers a laboratory procedure for the determination of the extension-recovery and adhesion of latex sealants.

This test method evaluates the performance of a latex sealant in joints subjected to a limited amount of extension

Summary of Test Method

A joint of prescribed dimensions, between glass and aluminum plates is filled with the sealant.

After an aging period, the joint width is increased 25 %, the force is removed, and the specimen is permitted to recover.

The amount of recovery and the percent of adhesion loss are measured.

Apparatus

Extension Machine that can be operated at a steady rate of 12.7 mm/min (0.5 in./min) and held at constant extension for 5 min.

Referenced Documents

ASTM Standards

ASTM C717 Terminology of Building Seals and Sealants

ASTM C1375 Guide for Substrates Used in Testing Building Seals and Sealants

ISO Standard: ISO 7389 Building Construction–Sealants–Determination of Elastic Recovery

*** Before conducting ASTM C736 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.