Replacement Back Battery Door Adhesive for Samsung Galaxy S21 Ultra 5G SM-G998U G998U1 G998 - Pre-Cut Double Sided Glue Tape Sticker - 2 Pack

Professional Repair Grade: 3-Layer Composite Adhesive for S21 Ultra Restore your phone’s integrity with our industrial-strength back cover adhesive. Unlike standard single-layer stickers, our product is engineered with a triple-layer "sandwich" structure designed specifically for the rigors of mobile repair. Why Choose Our 3-Layer Structure? White High-Tack Layer: Formulated to grip the micro-textures of the metal frame for maximum adhesion. Black PE Foam Core: Provides essential shock absorption to protect the rear glass and acts as a closed-cell barrier against dust and moisture. Black Glass-Bonding Layer: Optimized for a smooth, flush finish with the glass back panel, ensuring a clean, factory-like appearance. Precision Pre-Cut for Hassle-Free DIY Skip the frustration of manual trimming. Each sticker is precisely machine-cut to match the internal contours of the Samsung Galaxy S21 Ultra (SM-G998U/G998U1/G998). This ensures: Zero Overhang: No messy glue leaking from the edges. Perfect Alignment: Holes for cameras and sensors are accurately positioned. Beginner Friendly: Makes the repair process faster and significantly reduces the risk of error. The Truth About Water Resistance We believe in being honest with our customers: While our adhesive material is designed for sealing, achieving a waterproof result depends 100% on the quality of installation. To get the best possible seal, you must: Thoroughly Clean: Remove every bit of old adhesive residue using 90%+ isopropyl alcohol. Ensure Flush Fit: Verify the frame is not bent and the back glass sits perfectly flat. Apply Pressure: After sticking, apply firm, even pressure for at least 30 seconds to fully activate the bond. What’s in the Box? 2 x Pre-Cut Back Battery Door Adhesives (A spare is included for your peace of mind).

• Perfect Fit with Precision Pre-Cutting. Specifically machine-cut to the exact dimensions of the Samsung Galaxy S21 Ultra 5G (SM-G998U/G998U1/G998). This adhesive eliminates the need for manual trimming, ensuring a 100% accurate fit that matches the original phone frame contours perfectly.
• Professional 3-Layer Structure. Our professional-grade glue features a Triple-Layer Composite: A white high-tack layer for the metal frame, a black shock-absorbing foam core, and a black adhesive layer for the glass. This "sandwich" design provides superior bonding and cushioning compared to thin, single-layer stickers.
• Easy DIY Installation. The Pre-Cut design makes application straightforward even for beginners. By following the precise shape of the internal frame, it prevents messy liquid glue overflow and ensures the adhesive stays only where it’s needed, keeping your internal components safe and clean.
• Durable Sealing & Buffering. The internal black PE foam core acts as a critical barrier against dust and provides essential impact buffering. Pro Tip: While our material is designed for sealing, a successful water-resistant result depends on a completely residue-free frame and a perfectly flush installation.
• Double Security with 2-Pack Bundle. Each order includes 2 sets of pre-cut adhesives. This gives you a risk-free backup in case of a first-time alignment error. We recommend using a heat gun and firm pressure for 30 seconds to fully activate the pressure-sensitive bond for maximum security.