PROPERTIES

FILL-IT COMBINED WITH HAPREZ 3742 OR HAPREZ 3745 LV

Directions For Use:

SURFACE PREPARATION TO PREVENT ADHESION:

To prevent adhesion to the mold, use a GREASE IT release agent. The following are recommended; GREASE IT II, GREASE IT IV, GREASE IT WAX P, or GREASE IT WAX L. For best results, apply in a few thin coats, drying between coats. Porous surfaces, i.e. wood, plaster, etc, must be sealed thoroughly before release is applied. Use multiple coats of a good coating, such as: a high-grade lacquer or urethane lacquer.

SURFACE PREPARATION FOR ADHESION:

For applications where adhesion is desired, the surface must be cleaned, abraded and dried. Sandblasting and mechanical roughing are the preferred ways of abrading surfaces to be bonded. For added adhesion to metals, use Primer 200. Make sure all surfaces are clean, dry and free from moisture.

AIR RELEASE:

Use HAPCO'S ANTI-AIR to aid in air release (see Technical Bulletin). In some products, ANTI-AIR can cause a slight haze to cloudiness.  This has no effect on properties.

MIXING:

After Haprez and Hapcure have been mixed, add to Fill-It and mix well slowly. Some common techniques for mixing are; by hand, a dough mixer, a high viscosity pail mixer, or a cement mixer. Pour and tamp in place. To reduce and/or eliminate air entrapment, use rubber gloves for protection.  Use vibration while pouring and tamping in place for best results. Use a simple vibrating table or clamp on vibrator.

MACHINE MIXING AND DISPENSING:

Use HAPCO'S RAPIDFIL and/or RAPIDSHOT Dispensing Equipment for fast, reliable, and efficient dispensing.

SURFACE COATS:

Brush apply a first coat of HAPCOAT surface coat, taking care to eliminate all trapped air bubbles. Use a hair dryer, moving quickly over the surface, while brushing to help eliminate air bubbles. Take care to eliminate surface air. Allow to tack up, and brush on a second coat of Hapcoat. After the second coat tacks up, apply the backup.

CASTING:
Pour in a thin unbroken stream into the lowest point in the cavity or mold. This will help break up some of the air entrapped during mixing.

SHRINKAGE:

Shrinkage or dimensional variation is largely influenced by 5 factors:
1. Mass (total volume and thickness)
2. The temperature of the material
3.Maximum temperature reached during the exotherm (reaction). The faster the material, the higher the exotherm, the greater the shrinkage.
4. The temperature of the mold.
5. The stability of the mold Geometry, part thickness, and total volume vary in each design, therefore, the customer responsible to test and determine the shrinkage factor to be used. The values in the brochures are for comparative reference only, using ASTM testing procedure.

RESEALING:

Many polymers are moisture sensitive, reseal, using one of the following two (2) methods:  blanket with nitrogen or use a hair dryer for 30 seconds to cover with dry air.

STORAGE:

Polymer systems have a minimum shelf life of six months when unopened. Both components should be stored in a room temperature dry place. When not in use, containers should be kept tightly closed. (see Resealing)

CLEAN UP:

Cured polymers are most difficult to remove. It is best to clean tools and equipment immediately after use.

PRECAUTIONS:

Skin or eye contact with polymers should be avoided. Clean housekeeping procedures are urged and the use of gloves and/or protective creams suggested. 
All polymers, as a general practice, should be used in well-ventilated areas. Spot ventilation is most effective. Contaminated clothing should be removed immediately and the skin washed with soap and water or waterless skin cleaner. Should accidental eye contact occur, wash thoroughly with water and 
consult a physician.