Henkel Lite-Lok 463

Surface Preparation

LITE-LOK 463 bonds well to many untreated surfaces. However, adhesion is often improved by surface preparation before bonding. The surface should be free of contamination such as dirt, dust, grease or oil. An alcohol wipe is suitable for cleaning most surfaces. Optimum strength is obtained by abrading the surface followed by a solvent wipe to remove any loose particles. Polyolefins must be corona treated, or flame treated before bonding.

Application

LITE-LOK 463 is best applied by extruding the product onto the substrate to be sealed or bonded. Sufficient product must be applied to seal all gaps, and completely coat the part to be bonded or sealed. After dispensing onto the part, the product should be cured as soon as possible to prevent any pre-reaction with ambient light.

LITE-LOK 463 may be applied via a pressure pot, or piston pump dispensing system. All fittings and tubing used in the dispensing system must be opaque to light. If the product is transferred from a large container to a smaller hand held dispensing bottle, that bottle must be light impenetrable.

Curing

Optimum cure is obtained when LITE-LOK 463 is exposed to UV light in the UV-A spectral range (315-400 nanometers). The time needed for curing is a combination of many factors. Some of these are:

The thicker the substrate, the longer the exposure time needed for curing.

The more UV light absorbing that the substrate is, the longer the exposure time needed for curing.

The lower that the intensity of the UV light source is, the longer the exposure time needed for curing.

The farther the distance of the product from the UV light source, the longer the exposure time needed for curing.

Typically, LITE-LOK 463 will cure after a UV light exposure from two to five seconds, when cured at or near the focal point of the light source, and at the required energy levels stated below:

To achieve complete cure, all of the adhesive must be exposed to the UV light source. LITE-LOK 463 is not designed for use as a thin film <0.004 inch coating. LITE-LOK 463 cures best when cured between two substrates as an adhesive. Excess exposed product may exhibit a slight surface tack.

Clean-Up

Unreacted material can be cleaned up using acetone. If skin contact occurs, the affected area should be washed thoroughly with soap and water. Eye protection against UV light should be worn whenever the product is being used. Eye contact should be treated by thoroughly washing with water followed by medical attention. Aprons should also be used. Adequate ventilation is necessary to prevent inhalation of vapors.