At Pecora Corporation, innovation has always been a cornerstone of how we protect buildings, and reputations. This year, we celebrate the anniversary of SilcoPrime, our STPU-based interlaminary primer engineered specifically for one of the most challenging coating applications in the field, recoating silicone-covered exterior surfaces.
What Is SilcoPrime?
SilcoPrime is a silyl-terminated polyurethane (STPU) primer designed to bridge the adhesion gap between silicone-based coatings and exterior-grade, non-silicone architectural wall coatings. It’s not just a primer, it’s a problem-solver, created to make otherwise incompatible coating systems work together safely and effectively.
Whether the substrate is masonry, EIFS, metal paneling, etc., SilcoPrime is formulated to act as the critical intermediary layer that enables strong, lasting adhesion. This is particularly important during restoration projects, where removing old silicone coatings isn’t always feasible.
Why SilcoPrime Matters
Silicone coatings are known for their excellent water resistance and durability, but their slick, chemically resistant surface presents a major challenge for repainting or recoating. Before SilcoPrime, restoration options were limited, labor-intensive, or inconsistent.
SilcoPrime solves this problem by offering:
- Aggressive long-term adhesion to silicone-based substrates
- Low-temperature application (as low as 10°F), allowing extended seasonal workability
- VOC compliance and low odor, making it suitable for sensitive environments
- Fast curing with typical dry times of around 5 hours at 73°F
- Versatile application with brush, roller, or spray equipment
SilcoPrime also provides peace of mind with lab- and field-tested performance, meeting industry standards such as ASTM D4541 and C794 for adhesion strength. In short, it helps eliminate failure risks on some of the most stubborn surfaces in construction.
Where SilcoPrime Fits in Your Project
SilcoPrime is used primarily in restoration scenarios, where existing exterior silicone wall coatings need to be overcoated with non-silicone, high-performance systems like WeatherClad® or WeatherClad® WT. These coating systems offer excellent waterproofing, breathability, and aesthetic benefits, but require strong substrate adhesion to perform as intended.
Before SilcoPrime, the solution was often removal and replacement, an expensive and time-consuming process. Now, professionals can prime over existing silicone and move forward with confidence, saving time and reducing cost without compromising quality.
As we mark this anniversary, we extend our gratitude to the contractors, architects, and specifiers who have made SilcoPrime a trusted part of their restoration toolkit. And as building envelopes evolve, you can count on Pecora to continue delivering tools and technologies that adapt right along with them.
For information on Pecora’s SilcoPrime and companion wall coating products, please visit our website at https://www.pecora.com/products/wall-coatings-sealers/.
