3M Single Step Primer 08682 Instruction Manual

1. Introduction

The 3M Single Step Primer 08682 is a specialized one-part urethane primer designed to enhance adhesion in automotive glass applications. This fast-drying primer is formulated to promote the bonding of urethane adhesives to glass surfaces, including those with pre-applied adhesive systems (PAAS) or encapsulated glass. It also offers corrosion protection for minor pinchweld scratches and features UV resistance to help preserve urethanes for long-lasting windshield installations.

Image 1: 3M Single Step Primer 08682 bottle, 1.01 fl oz (30 mL).

2. Safety Information

Always prioritize safety when handling this product. Read and understand all instructions and warnings before use.

• Wear Personal Protective Equipment: Always wear a face mask and eye protection to prevent inhalation of fumes and contact with eyes.
• Hand Protection: Wear appropriate gloves to avoid skin contact. This product can stain skin and other surfaces.
• Ventilation: Use in a well-ventilated area to minimize exposure to vapors.
• Flammability: This product is highly flammable. Keep away from heat, sparks, open flames, and other ignition sources. Ensure proper grounding of the can, yourself, and the work area to prevent static discharge.
• Intended Use: 3M industrial and occupational products are intended for workplace use by trained professionals. They are not intended for consumer use (e.g., home, personal, recreational).
• Disposal: Dispose of used materials and containers according to local regulations.

3. Product Features

• Urethane Adhesion: Specifically formulated to promote strong urethane adhesion in automotive glass applications.
• Pinchweld Touch Up: Effective for inhibiting corrosion on pinchwelds, contributing to the longevity of the installation.
• Easy to Use: Fast-drying, one-part formula that requires no activator, simplifying the application process.
• UV Resistant: Helps protect and preserve urethanes from UV degradation, ensuring long-lasting windshield installations.
• Versatile Application: Suitable for various windshield types, including encapsulated glass and PAAS (Pre-Applied Adhesive Systems).

Image 2: Primer promoting urethane adhesion.

Image 3: Primer for pinchweld touch up.

Image 4: Primer is fast-drying and easy to use.

Image 5: Primer offers UV resistance.

4. Setup and Preparation

Proper preparation of the bonding surfaces is critical for optimal adhesion and performance of the 3M Single Step Primer.

1. Clean the Surface: Thoroughly clean the glass and pinchweld surfaces where the primer will be applied. Remove all dirt, grease, old adhesive residue, and contaminants. Use a suitable automotive glass cleaner and a clean, lint-free cloth. For existing adhesive, carefully scrape off old glue using a razor blade, ensuring not to damage the glass or surrounding materials.
2. Dry the Surface: Ensure all surfaces are completely dry before proceeding.
3. Shake Primer Bottle: Shake the 3M Single Step Primer bottle vigorously for at least 30 seconds to ensure the contents are well mixed.
4. Prepare Applicator: For best results, apply the primer with a 3M Urethane Primer Dauber (PN 08688) or a similar suitable applicator.

Image 6: Recommended 3M Urethane Primer Daubers for application.

5. Operating Instructions (Application)

Follow these steps for effective application of the 3M Single Step Primer:

1. Apply Primer to Glass: Using the dauber, apply a thin, even coat of 3M Single Step Primer to the perimeter of the glass where the urethane adhesive will be applied. Ensure complete coverage without excessive pooling.
2. Apply Primer to Pinchweld (if necessary): If there are minor scratches on the pinchweld (the metal flange around the window opening), apply a thin coat of primer to these areas to inhibit corrosion.
3. Allow to Dry: The primer is fast-drying. Allow it to dry completely before applying the urethane adhesive. Drying time may vary based on temperature and humidity, but typically takes approximately 10 minutes. Refer to the urethane adhesive instructions for specific cure times.
4. Apply Urethane Adhesive: Once the primer is dry, apply the chosen 3M Auto Glass Urethane Windshield Adhesive according to its specific instructions.
5. Position Glass: Carefully position the glass onto the primed and adhesived pinchweld.
6. Secure Glass: Use appropriate tools, such as suction cups or clamps, to hold the glass firmly in place while the urethane adhesive cures. Ensure even pressure around the entire perimeter.

6. Maintenance

The 3M Single Step Primer itself requires no specific maintenance after application and curing. However, proper care of the installed glass and surrounding areas will ensure the longevity of the repair.

• Clean Spills Immediately: If any primer drips or spills onto unintended surfaces, wipe it off immediately with a suitable solvent before it dries. Once dry, it can be difficult to remove.
• Storage: Store the primer in its original container, tightly sealed, in a cool, dry, well-ventilated area, away from direct sunlight and ignition sources.
• Shelf Life: Adhere to the product's shelf life recommendations for optimal performance.

7. Troubleshooting

Most issues related to primer application can be avoided by following the instructions carefully.

• Poor Adhesion: If the urethane adhesive does not bond properly, it may be due to insufficient surface cleaning, improper drying of the primer, or applying the urethane before the primer was fully dry. Ensure all preparation steps are followed meticulously.
• Uneven Application: An uneven coat of primer can lead to inconsistent adhesion. Apply a thin, uniform layer using the recommended dauber.
• Primer Drying Too Quickly/Slowly: Environmental conditions (temperature, humidity) can affect drying time. Work in a controlled environment if possible.
• Staining: The primer is black and can stain. If it gets on unintended surfaces, attempt to clean immediately with an appropriate solvent. Always wear gloves and protect surrounding areas.

8. Specifications

9. Warranty and Support

Specific warranty information for the 3M Single Step Primer 08682 is not provided in the product details. For detailed warranty terms, technical support, or product-related inquiries, please contact 3M directly or visit their official website.

For additional product information, visit www.3M.com.