Unlocking Longevity: Delving into the Crucial Role of Surface Preparation in Coating and Sealant Performance
In a groundbreaking session at the 2024 FGIA Annual Conference, Aaron Blom took center stage with his presentation titled “The Importance of Surface Preparation in Long-Term Performance of Coatings and Sealants.” Serving as the inaugural installment of what promises to be an enlightening series, Blom meticulously explored the advantages of surface preparation, delineating the proper steps, potential pitfalls of neglecting preparation, and an often-overlooked but vital aspect of the process.
Blom commenced by acknowledging the existing discrepancies in surface preparation guidance provided by different suppliers. He expressed a hope for increased consistency in the future, particularly recognizing the critical role pre-treatments play in finishing, sealant or adhesive applications, and the construction of IG units. Highlighting the necessity of glazing surfaces being free from moisture, dirt, grease, oil, and other contaminants, Blom questioned whether merely cleaning the glass goes far enough in the pre-treatment process.
Diving into the intricacies, Blom identified edge seal failures as commonly rooted in poor water proofing, inadequately sized weep or vent holes, faulty glazing techniques, or excessive edge pressure. To counter these issues, he presented a comprehensive five-step process for optimal joint preparation and sealant application, emphasizing cleanliness, priming, packing, shooting, and tooling.
Addressing the disparity between in-plant and field installation preparation, Blom pondered why the latter should differ when facing similar contaminants, along with a few additional challenges. He underscored the elusive nature of surface preparation, asserting that unseen contaminants can cause as many problems as visible ones.
Blom underscored the manifold benefits of a well-prepared surface, including enhanced adhesion, a seamless finish, time and cost savings, and, most importantly, long-term performance. Cautioning against aggressive solvents that can compromise finishes, he stressed the need for molecular-level readiness for accepting the finish.
Navigating the challenges of assessing surface quality, Blom recommended seeking assistance for measuring surface energy. He acknowledged the uncontrollable conditions in rough openings, particularly in replacement scenarios, and urged thoroughness in surface inspection and rectification.
Concluding his enlightening session, Blom unveiled the often-neglected step in the process—implementing a robust quality control or quality system. He emphasized the importance of tracking data and preparation techniques to break the cycle of repeated mistakes.
In a parting call to action, Blom urged participants to communicate with FGIA and contribute to efforts in raising awareness about the pivotal role of surface preparation.
Source: FGIAonline.org with additional information added by GlassBalkan
