3M Hi-Tack 76 Spray Adhesive Instruction Manual

1. Product Overview

The 3M Hi-Tack 76 Spray Adhesive is an industrial-grade aerosol adhesive designed for creating strong, effective bonds on a variety of hard-to-hold materials, including polyethylene and polypropylene. It features fast-tacking properties and a variable-width lace spray pattern for precise application and minimal overspray.

Key Features:

• High-tack formulation for strong, immediate bonds.
• Fast-tacking adhesive for quick project completion.
• Variable-width lace spray pattern for controlled application and reduced waste.
• Low-misting property ensures precise spray control.
• Suitable for bonding challenging materials like polyethylene and polypropylene.

Figure 1: Front view of the 3M Hi-Tack 76 Spray Adhesive can.

2. Important Safety Information

For industrial/occupational use only. Not for consumer sale or use.

3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. These products are not intended, labeled, or packaged for sale to or use by consumers. Users must select and use products in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.

This product contains 1,1-Difluoroethane. Always use in a well-ventilated area. Avoid prolonged breathing of vapors. Wear appropriate personal protective equipment, including safety glasses and gloves. Refer to the Safety Data Sheet (SDS) for complete safety information.

Proposition 65 Warning:

This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Figure 2: Back view of the 3M Hi-Tack 76 Spray Adhesive can with safety warnings.

3. Preparation

3.1 Surface Preparation

• Ensure all surfaces to be bonded are clean, dry, and free from dust, oil, grease, and other contaminants.
• For best results, lightly abrade smooth surfaces to improve adhesion.
• Protect surrounding areas from overspray using masking tape or drop cloths.

3.2 Product Preparation

• Shake the can thoroughly for at least 10-15 seconds before use and periodically during application to ensure proper mixing.
• Test the spray pattern on a scrap piece of material to familiarize yourself with the variable-width lace spray.

4. Application Instructions

4.1 General Application

1. Adjust Nozzle: Rotate the spray tip to achieve the desired spray width (narrow, medium, or wide lace pattern).
2. Spray Application: Hold the can 6-8 inches (15-20 cm) from the surface. Apply a uniform, even coat of adhesive to one or both surfaces, depending on the material and desired bond strength.
3. Open Time: Allow the adhesive to become tacky. For single-surface application, wait approximately 1-10 minutes. For two-surface application, wait 1-60 minutes. The adhesive is ready when it feels tacky to the touch but does not transfer to your finger.
4. Bonding: Carefully align the surfaces and press them firmly together. Apply uniform pressure across the entire bonded area to ensure maximum contact.
5. Cure Time: The adhesive will achieve handling strength quickly, but full cure time is approximately 24 hours. Avoid stressing the bond during this period.

4.2 Bonding Polyethylene and Polypropylene

For optimal adhesion to challenging plastics like polyethylene and polypropylene, ensure surfaces are exceptionally clean and dry. Apply a medium-to-heavy coat of adhesive to both surfaces. Allow sufficient open time (5-10 minutes) for the adhesive to become very tacky before joining. Apply firm, even pressure.

5. Cleanup and Storage

5.1 Post-Application Cleanup

• To prevent clogging, invert the can after each use and spray for a few seconds until only propellant comes out. Wipe the nozzle clean with a cloth.
• Excess adhesive can be removed with a citrus-based cleaner or mineral spirits, following the cleaner manufacturer's instructions.

5.2 Storage

• Store the adhesive in a cool, dry place away from direct sunlight, heat sources, and open flames.
• Keep out of reach of children and pets.
• Ensure the cap is securely replaced after each use.

6. Troubleshooting

6.1 Adhesive Not Bonding Properly

• Issue: Weak bond or no adhesion.
  Solution: Ensure surfaces are clean and dry. Apply a sufficient, even coat of adhesive. Allow adequate open time for the adhesive to become tacky before joining surfaces. Apply firm, uniform pressure.

6.2 Clogged Nozzle

• Issue: Adhesive does not spray or sprays unevenly.
  Solution: Invert the can and spray until clear propellant appears. If still clogged, remove the nozzle and soak it in mineral spirits or a citrus-based cleaner. Clean the nozzle opening with a thin wire if necessary.

6.3 Excessive Overspray

• Issue: Adhesive sprays beyond the intended area.
  Solution: Adjust the nozzle to a narrower spray pattern. Hold the can closer to the surface (e.g., 6 inches). Use masking to protect surrounding areas.

7. Product Specifications

8. Warranty and Support

For product support, technical assistance, or warranty information, please contact 3M directly. 3M stands behind its products and provides resources to ensure proper usage and satisfaction.

For additional product information, Safety Data Sheets (SDS), and contact details, please visit the official 3M website:

www.3M.com

You may also consult your on-site safety professional, industrial hygienist, or other subject matter expert for guidance on product selection and use in your specific workplace environment.