3M™ Scotch-Weld™ Structural Adhesives Primer EC-3960

With its sprayable consistency, 3M™ Scotch Weld™ Structural Adhesive Primer EC 3960 is capable of high transfer efficiency for less overspray waste. When cured it promotes long term durability for bonded joints. EC 3960 can be co cured with our adhesive films at 250°F or 350°F to accommodate a variety of requirements and lessen the burden on inventory requirements.

Corrosion Control

Our chromate free formula provides corrosion protection inside and outside the bondline. And to make matters easier, EC 3960 can be used to apply an anti corrosion coating on components or heat cured to form a durable protection against corrosion. When cured at 250°F EC 3960 provides a solvent resistant coating for long term durable protection. The stable coating also protects etched and anodized substrates for long term storage.

The Primer Difference

3M™ Scotch Weld™ Structural Adhesive Primer EC 3960 contains no hexavalent chromium, which helps streamline regulatory compliance and protect against corrosion. Additionally, this primer can help improve production rates by offering high transfer efficiency for less overspray waste and quick flash off for no wait time between passes. Let our unparalleled technical service and support show you how this primer can make a difference to your primer line and your bottom line. 3M™ Scotch Weld™ Structural Adhesive Primer EC 3960 also offers these benefits:

• Excellent corrosion protection


• Robust mechanical performance


• Impressive hot/wet durability


• Serves both 250° and 350°F co cure requirements


• Fewer applications and faster drying cycle saves time


• Sprayable application

Prime Pre Treatment

In general, 3M Scotch Weld structural adhesive primers can be used to pre treat the substrates to be bonded. They facilitate "wet out" of the primary adhesive agent to facilitate the bond between substrate and coating extrudate, then cured to enhance chemical resistance. Adhesive primers can reduce bondline void contents by reducing the roughness of pretreated composite surfaces and help improve the adhesive capabilities of 3M Scotch Weld film adhesives. Our adhesive primers help prepare the surfaces for the bonding agents and improve the conditions so that the adhesives are more effective and create stronger, longer lasting bonds.

Our Best for Your Best

3M is proud to partner with organizations across the spectrum of aerospace and related industries. Enabling efficiencies, reducing process times and lowering aircraft weight is how we execute our never ending mission to offer best in class adhesives, sealants, surface protection products and composite resins that effectively reduce costs on multiple fronts. Professionals across the industry know the numerous advantages of 3M Aerospace. Our brand is widely recognized for the highest standards of quality and performance, adding value to the final results. By engineering reliability, longevity and value into all of our products, we have a history of saving money by reducing waste, rework and time.