Here's a breakdown of what's involved in resealing versus replacing:
Resealing (Difficult and Risky):
* Requires Specialized Tools: You'll need specialized tools to remove the old adhesive completely and to properly install the new adhesive. This includes things like adhesive remover, scraping tools, possibly a heat gun (to soften the old adhesive), and clamps or weights to hold the glass in place while the adhesive cures.
* Precise Removal of Old Adhesive: Removing all traces of the old adhesive is crucial for a successful reseal. Any residue can prevent proper adhesion of the new sealant. This is a very time-consuming and potentially damaging process.
* Proper Adhesive Selection: You need the correct type of automotive-grade urethane adhesive designed for this application. Using the wrong adhesive will lead to failure.
* Cleanliness is Paramount: The surfaces of both the glass and the car body must be impeccably clean, dry, and free of any grease or dirt. Any contamination will compromise the seal.
* Alignment and Clamping: Precise alignment of the glass is critical. Improper alignment will result in leaks and stress on the glass. Clamps or weights are essential to hold the glass securely in place while the adhesive cures.
* Curing Time: The adhesive requires a specific curing time, often several hours or even overnight, before the car can be driven.
Replacing (Easier and More Reliable):
* Potentially Easier and Faster: Replacing the entire rear glass unit might actually be quicker and easier than attempting a reseal, especially if you're not experienced with auto glass repair.
* Guaranteed Seal: A new unit comes with a guaranteed seal, eliminating the risk of leaks or further problems.
* Professional Installation: Auto glass shops have the expertise and tools to properly install a replacement unit, providing a more reliable outcome.
In summary: While technically feasible, resealing the rear window of your Celica convertible is a complex task best left to experienced auto glass professionals. The potential for mistakes leading to leaks, damaged glass, or further expense is high. Unless you possess significant experience in auto glass repair and have access to the necessary tools and materials, replacement is the recommended approach. The cost difference might not be that significant when factoring in the time, effort, and potential for failure when attempting a DIY reseal.
