How to Install a Windshield Banner on Your Car

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Banner Installation Guide

Step-by-step instructions for 40" (dry) and 60" (wet) windshield banner installs.

Take your time with prep — it’s 80% of a clean install. If you’re unsure, we recommend professional installation.

Tools You’ll Need

  • Microfiber cloths & isopropyl alcohol (70%+)
  • Masking tape or painter’s tape
  • Plastic squeegee (felt edge if available)
  • Measuring tape & level (or a straight edge)
  • Sharp blade/scissors
  • Optional: heat gun or hair dryer (low heat)

Surface Prep

  • Install on a clean, dry, smooth surface (50–90°F / 10–32°C).
  • Wash area to remove dirt/wax; wipe with isopropyl alcohol; let dry completely.
  • Avoid installing in wind, rain, or direct hot sun.

40" Banner Install

40" Banners — Dry Method

Prefer reading? The full dry-method steps are listed below.

Tip: Install with a friend for best results.

Installation — Dry Method

  1. Position & tape a hinge: Hold the banner in place and use masking tape vertically through the center of the banner to create a hinge. Step back and confirm level and centering before continuing.
  2. Peel backing to the hinge: Lift one side and peel the liner back to the center hinge. Don’t touch adhesive with dusty hands.
  3. Lay down from hinge outward: Starting at the center, use a squeegee in firm overlapping strokes at 45°, working outward to the edge.
  4. Remove the hinge & finish: Peel remaining liner and continue squeegeeing from the adhered area outward until fully down.
  5. Remove masking tape correctly: Lay the tape flat against the windshield glass and pull slowly at a 45° angle. This prevents the vinyl from lifting or stretching.

60" Banner Install

60" Cut Out Banners — Wet Method

Reminder: For 60" banners with masking tape, leave the clear masking tape on for a few hours. When you peel it off slowly, if the banner starts to lift, stop and let it dry longer until it no longer lifts. You can also wet the tape slightly to help it release.
Tip: Install with a friend for best results.

Installation — Wet Method

  1. Clean your window: Use rubbing alcohol to clean your windshield.
  2. Peel the back: Lay the banner face down. Carefully peel off the white backing paper.
  3. Spray the banner: Lightly spray the sticky side with water + a small amount of baby shampoo. Don’t get the paper backing wet.
  4. Spray the windshield, roof, pillars: Spray generously with the same mix so you can position evenly.
  5. Place it: Center carefully and ensure the corners reach and cover the windshield edges before locking it in place.
  6. Squeegee out water: Push water out from the middle toward the edges.
  7. Trim edges: Carefully trim any excess vinyl around the edges.
  8. Cure time: Allow the banner to dry for 48 hours before it gets wet or hot. Avoid driving during this period to prevent airflow from lifting edges.

Early driving may cause lifting or peeling due to wind pressure before the adhesive has cured.

Aftercare

  • Wait 24 hours before heavy washing.
  • Hand wash only; avoid pressure washers at seams/edges.
  • Inspect edges periodically and press down if lifted.

Important

  • We can’t replace items damaged by improper installation or misuse.
  • If in doubt, use a pro installer.

Additional Questions

Trapped bubbles

Small bubbles often dissipate in a few days. For stubborn ones, prick the edge with a fine pin and push air out with the squeegee.

Wrinkles/creases

Lift gently, add light heat, and re-squeegee from the center out. Don’t overstretch the material.

Edge lift

Warm the edge and press down firmly with a felt squeegee. If dust got under the edge, clean & dry first for best adhesion.

Need more help?

Reach out anytime at support@happyendingsofficial.com