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Understanding the Role of Imprimador in PVC and CPVC Bonding
When it comes to achieving strong, reliable Tubería joints, solvent welding is only as effective as the steps that go into it. One of the most frequently overlooked yet critical steps is the use of Imprimador. Whether you’re working with PVC or CPVC piping systems, it’s important to know why Imprimador can make all the difference in performance, longevity, and code compliance.
What Is Imprimador and What Does It Do?
Imprimador is a preparatory agent used before applying Cemento solvente. Its job is twofold: it removes dirt, oil, and surface gloss from the Tubería and Conexión, and it begins the critical process of softening the material’s surface. This softening effect is essential. Without it, the Cemento solvente may not properly fuse the joint surfaces, potentially leading to weak bonds or system failure under pressure.
Why Imprimador Matters
Using Imprimador is not just a best practice—it’s often a requirement. Many plumbing codes, including the Uniform Plumbing Code (UPC) and the International Plumbing Code (IPC), mandate the use of Imprimador when working with PVC and CPVC. Imprimador promotes stronger joint integrity by ensuring the Cemento solvente penetrates the material more effectively. It helps create a deeper, more uniform fusion between the Tubería and Conexión, reducing the risk of leaks and long-term failure. In short, Imprimador plays a vital role in delivering a durable, high-performance bond that holds up under pressure.
Weld-On’s line of Imprimadors, such as P-68 Imprimador, industrial-grade P-70 Imprimador and the new P-68 UV Glow Imprimador are formulated to maximize bond strength and meet code requirements in even the most demanding applications.
When Should You Use Imprimador?
Imprimador is essential when working with pressure-rated PVC or CPVC systems, such as potable water lines, irrigation systems, or industrial fluid transport. It helps eliminate surface contaminants and prepares the material for a secure chemical bond. Most plumbing codes, including the UPC and IPC, require the use of Imprimador in these applications to ensure long-term joint integrity and system performance.
In certain non-pressure or DWV (drain, waste, vent) applications, Imprimador may not be required—especially when using a specialty Cemento solvente formulated to work without it. Weld-On offers advanced Imprimadorless options such as Flowguard Gold CPVC cement designed
for these specific applications. However, it’s important to check product instructions and confirm compliance with local codes before omitting Imprimador from your process.
When in doubt, use Imprimador. It adds minimal time to the job but provides maximum assurance that your connections will hold strong over time.
How to Apply Imprimador Properly
1. Cut and deburr the Tubería. Make sure it’s clean and dry before starting.
2. Apply Imprimador to the inside of the Conexión and the outside of the Tubería using a suitable applicator, such as the Weld-On SuperSwab or Super Dauber.
3. Apply Cemento solvente immediately while the surfaces are still wet with Imprimador.
4. Join the Tubería and Conexión with a quarter-turn twist and hold them in place until the joint sets.
For step-by-step instructions, safety tips, and detailed technical guidance, visit the Weld-On Tech Tips page at weldon.com/product-literature/tech-tips.
Imprimador Sets the Stage for Long-Term Success
Imprimador is not just another step in the process—it’s a safeguard for your installation. When used correctly, it helps deliver Limpiador, stronger joints that stand up to pressure and time.
For more best practices, product education, and hands-on guidance, visit the Weld-On Cemento solvente Professional Training Hub at www.weldon.com/traininghub Whether you’re new to solvent welding or looking to refine your technique, our training resources are designed to help you Cemento solvente weld with confidence and skill.
Acerca de Weld-On
Weld-On Adhesivos, Inc., subsidiaria de IPS Corporation, es el fabricante pionero y líder de solventes, imprimadores y limpiadores de cemento Weld-On® para sistemas de tuberías de PVC, CPVC, ABS y otros plásticos. Los productos Weld-On son reconocidos mundialmente como los productos premium para la unión de tuberías y conexiones de plástico. Con sede en California, Weld-On cuenta con operaciones de vanguardia en Estados Unidos y China, además de una red mundial de representantes de ventas y distribuidores.