Joints and Sections
Joint and Sections
Overlap Joint
Overview:
This procedure can be used when panel sectioning is being performed on a door skin at the window belt line section. It is also a great procedure for a patch panel being used for corrosion perforation. If using during an OEM panel replacement such as a quarter panel, side aperture on a mini van, or rocker panel you must also use weld bonding at the pinch weld flange area.
Illustration A:
Illustration B:
Preparation:
1. All paint, primer, adhesive, and any other corrosion protection coatings must be removed from the two mating surfaces prior to application. Grind a 2.5cm (1 inch) contact area on both panels where you will do your overlap bond. The metal should be bare and shiny in appearance.
Note: Apply the structural adhesive to all bare metal at the bond locations. The adhesive has corrosion resistant properties built-in to protect the metal from corrosion.
2. Pre-bevel to 10 degrees the outer side of the section joint edge of the new panel (See Illustration A)
3. Pre-fit the new panel to ensure proper alignment. If screws will be required to hold the panel in place during curing apply them now to ensure proper fit later.
4. Dispense a small amount of Mopar (part # 05083855AA)/ Fusor #112B structural adhesive from the cartridge to ensure an even flow of both components. Attach a mixing tip and dispense a mixer's length of the adhesive from the cartridge.
Note: You will have approximately 70 minutes @ 21°C (70°F) to apply the adhesive and assemble the components.
Application:
1. Apply a 3/8 to 1/2 inch bead of Mopar (part # 05083855AA) / Fusor #112B structural adhesive to the mating surfaces. Evenly apply the adhesive over the complete bonding surface making sure not to leave any bare metal.
2. Position the new panel making sure not to lift up on it as lifting will create air bubbles and weaken the bond. Adjustments to the panel fit must be made by sliding, not lifting.
3. Clamp tightly and evenly. There are glass beads in the adhesive that will prevent complete squeeze out. Apply screws in hard-to-clamp areas. Remove excess adhesive from all joints prior to adhesive cure.
4. Allow the adhesive to cure. The Mopar / Fusor #112B structural adhesive takes approximately two to two and a half hours to reach handling strength. The Mopar / Fusor #112B fully cures in approximately eight hours. Expect the adhesive to be a little "tacky" on the surface. This is a normal property of the adhesive.
5. Remove clamps and screws. All excess adhesive must be removed from the cosmetic repair area prior to doing any finish work. This will prevent more work later.
6. Bevel the center of the screw-holes and apply fiber-filled waterproof body filler to the screw holes and section seam, complete the repair using conventional body filler. Block sand, prime and paint per paint manufacturer's recommendations.
Joint Using a Backer Panel
Overview:
Backer panel procedures can be used to achieve a smooth joint between panel sections. The backer panel section is good for locations when you don't have the room to smooth an overlap joint. An example would be a corrosion perforation hole in a roof panel. The backer panel joint is a common repair for rocker panel or lower quarter panel sections. When using backer panels on rocker or lower quarter panels all pinch weld locations must be weld/bonded, Refer to The Chrysler Group's Weld Bond publication, part number 81-170-03005 for additional information.
Preparation:
1. The original panel joint edge must be pre-beveled to 10 degrees (See Illustration C).
2. All paint, primer, adhesive, and any other corrosion protective coatings must be removed from all mating surfaces prior to application of the adhesive. Grind a 2.5cm (1 inch) contact area on all panels where you will do your backer panel bonding. The metal should be bare and shiny in appearance. The backer panels must also be free of all coatings. Bevel the backer panel edges to prevent moisture or condensation from collecting between the backer and outer panel. (See Illustration C).
Note: Apply the structural adhesive to all bare metal at the bond locations. The adhesive has corrosion resistant properties built-in to protect the metal from corrosion.
3. Pre-fit the backer panels to both panels being joined to ensure a proper fit. If screws will be used to hold the panel in place during curing, dry fit them now to ensure proper fit later.
Note: 2.5cm (1 inch) overlap of bonded area is recommended.
4. Dispense a small amount of Mopar (part # 05083855AA) / Fusor #112B Structural Adhesive from the cartridge to ensure an even flow of both components. Attach a mixing tip and dispense a mixer's length of the adhesive.
Application:
1. Apply a 3/8 to 1/2 inch bead of Mopar / Fusor #112B structural adhesive to the bare metal mating surfaces (Backer Panels).
2. Position the backer panel against the underside of the original panel. Remember do not separate the panels once positioned together, slide the panel for proper alignment.
Illustration C:
3. If working on a rocker panel, lower quarter panel, or other location with limited access for clamping, use screws to hold the panels together during te curing process Remove all adhesive squeeze out before it cures.
4. Allow the adhesive to cure approximately two to two and a half hours to reach handling strength. The Mopar / Fusor #112B fully cures in approximately eight hours. Expect the adhesive to be a little "tacky" on the surface once cured. This is a normal property of this adhesive.
5. Remove the clamps and/or screws. If screws must be used in a cosmetic area, all excess adhesive must be removed.
6. Bevel the screw-holes and prepare the joint and screw holes for the application of waterproof fiber-filled body filler. Complete the repair using conventional body filler.
7. Refinish following paint manufacturer's recommendation.