Hardness Rating of Gap Pad(Gap Filler)

Q: Why does the data sheet describe the hardness rating

as a bulk rubber hardness?

A: A reinforcement carrier is generally utilized in Bergquist Gap Pads

for ease of handling. When testing hardness, the reinforcement

carrier can alter the test results and incorrectly depict thinner

materials as being harder. To eliminate this error, a 250 mil rub-

ber puck is molded with no reinforcement carrier. The puck is

then tested for hardness. The Shore hardness is recorded after a

30 second delay