Norland Optical Adhesive 1625


Norland Optical Adhesive 1625 is clear liquid adhesive that will cure when exposed long wavelength ultraviolet light. NOA 1625 is recommended for bonding for glass to glass. Adhesion is also good to cellulose acetate butyrate. NOA 1625 is cured by ultraviolet light between 315 to 395 nm. Full cure requires 6 Joules/cm 2 . The adhesive exhibits oxygen inhibition when used as a coating.  To overcome this the adhesive must be cured under an inert atmosphere, such as nitrogen. This adhesive when fully cured is soft and rubbery.



Typical Properties of NOA 1625



Refractive Index


Temperature Range

-15° C to 90° C

Viscosity @ 25C

 60-80 cps

Elongation at Failure        27.7%
Shore A         29



Keep NOA 1625 refrigerated in a dark place in the original container, refer to the package label for the actual expiration date.. Allow the adhesive to come to room temperature before using.


Care should be taken in handling the this material. The material Safety Data Sheet should be read for this product. Prolonged contact with skin should be avoided and affected areas should be washed thoroughly with copious amounts of soap and water. If adhesive gets into eyes, flush with water for 15 minutes and seek medical attention.



Spectral Transmission of NOA 1625

(thru 1 mil film thickness)

2000nm     99.0%

 1500nm     99.0%

1000nm     97.5%

  750nm     97.4%

   650nm    97.2%

   550nm    96.8%

    500nm    96.5%

    450nm    96.1%

    350nm   90.0%

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