McGuire FlexGuard Universal Corners

McGuire FlexGuard Universal Corners

McGuire’s labor-saving, pre-molded FlexGuard Universal Corners are ideal for flashing corners on a variety of details. Installation is quick and simple with no stretching required.

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  • Conforms easily to details on construction installations where angles are common.
  • Provides substantial labor savings compared to field fabricating.
  • Each universal can be cut into one outside corner or one inside corner.
  • More consistent appearance and installation compared to field fabricated corners.
Outside Corners
  1. Clean the surface to be welded with weathered membrane cleaner.
  2. Place the outside corner into position over the outside intersection of the corner.
  3. Begin welding at the bottom point of the outside corner. Weld straight up the vertical portion of the corner. Weld each side of the outside corner, working from the inside toward the outside.
  4. Weld the bottom flange starting on the inside and working towards the outer edges. Use the edges of the roller to crease the corner into any membrane step-off to create a proper seal.
  5. Once the material has completely cooled, probe all welded edges of the corner to ensure watertight performance.
Inside Corners
  1. Clean the surface to be welded with weathered membrane cleaner.
  2. After the cut is made from the Universal Corner for the inside corner, flip the cut piece over. Position the inside corner into the corner setting. Begin welding at the innermost corner point and work up and away from the corner. Weld each side of the inside corner, working from the inside toward the outside.
  3. Weld the bottom flange starting on the inside and working towards the outer edges. Use the edge of the roller to crease the corner into any membrane step-off to create a proper seal.
  4. Once the material has completely cooled, probe all welded edges of the corner to ensure watertight performance.
Physical Property Test Method Typical Properties
Minimum Maximum
Dimensional Conformance Thickness, in. (mm) ASTM D412 0.160 (4.06) 0.180 (4.5)
Density, lbs./ft³; (gr/cm³) ASTM D792 80.5 (1.29) 84.3 (1.35)
Tensile Strength, psi (MPa) ASTM D638 600 (4.1)
Tear Strength, lbf/in (kN/m) ASTM D624 100 (17.5)
Sizes 34″ wide × 50′ long
Packaging 9 per skid, each roll individually bagged
Weight (each) 97 lbs.
Thickness 80-mil at bottom of tread, 80-mil at yellow welding edge, 170-mil overall
Color White, gray and tan