Henkel Adhesive Technologies

Henkel Adhesive Technologies

Light curing adhesives


Light cure adhesive gel with red fluoresence for medical device applications and other light cure assemblies

Transparent. fast cure, light-cure acrylic adhesive gel for medical device bonding and other light cure applications where the fluorescent properties of substrates may interfere with the detection of adhesives. 

All marks used are trademarks and/or registered trademarks of Henkel and its affiliates in the US, Germany, and elsewhere.

Part no. (SKU/IDH)

LOCTITE 3979 Light Cure Adhesive



LOCTITE® AA 3979 is a 1-part, UV/visible light-cure acrylic adhesive gel that fluoresces red under UV light, making it ideal for medical device bonding applications where the fluorescent properties of the substrates hinder detecting the adhesives. It is a gel viscosity to fill large gaps and to prevent migration following application.

Agency approvals / certificates / specifications:

ISO 10993


Medical Device Assembly



Cure type:

UV Cure,Visible Cure

Elongation, at break:

227.0 %

FEA (finite element analysis):

Finite Strain,Viscoelastic

Key characteristics:

Cure Speed: Fast Cure,Flexible,Fluorescent,Viscosity: High Viscosity

Number of components:

1 Part

Physical form:


Recommended for use with:

Polycarbonate,Polyvinyl Chloride (PVC)

Shear strength, Polycarbonate to PVC:

1685.0 psi

Shear strength, Polycarbonate to Polycarbonate:

4320.0 psi

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