UNITIZED PREGLAZED FIXED GLAZING SYSTEM The Pro-Tech glazing system is a unitized pre-glazed glazing system. This high-performance glazing system is completely fabricated in-house with a clean, carefully controlled environment, which is ideal for minimizing error and allowing for the structural silicone to set and cure without exposure to outside elements, dust, and dirt. This ensures a durable, long-lasting adhesion to the framing. Once assembled, they are shipped to the job