Standard Test Method for
Qualitative Determination of Adhesion of Adhesives to
Substrates by Spot Adhesion1
This standard is issued under the fixed designation D 3808; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers a simple qualitative procedure
for quickly screening whether an adhesive will, under recommended application conditions, bond to a given substrate
without actually making bonded assemblies.
1.2 The values stated in SI units are to be regarded as the
standard. The values in parentheses are for information only.
1.3 This standard does not purport to address all of the
safety concerns associated with its use if any. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations before use.
2. Referenced Documents
2.1 ASTM Standards:
D 907 Terminology of Adhesives2
E 171 Specification for Standard Atmospheres for Conditioning and Testing Flexible Barrier Materials3
3. Terminology
3.1 Definitions—Many of the terms used in this test method
are defined in Terminology D 907.
3.1.1 spot adhesion, n—a qualitative method of determining
adhesion by attempting to pry a “spot” of cured adhesive from
a substrate.
4. Summary of Test Method
4.1 Spots of adhesive (size can vary, but generally about 6
mm (1⁄4 in.) in diameter) are placed onto a substrate using the
application procedure and curing conditions acceptable to both
user and supplier of the adhesive.
4.2 The substrate preparation and environmental exposure
of the spot of adhesive after cure or setting can be varied as
desired.
4.3 The determination of whether an adhesive bond to the
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