Product Data Sheet
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CORK EXPANSION JOINT
Expansion/Contraction Control Joint
CORK EXPANSION JOINT is produced from clean, selected, granulated cork bonded with a phenolic resin. It is highly resilient, will compress without extrusion, and recovers to 95% of its original thickness after 50% compression.
CORK EXPANSION JOINT is used where high resiliency is needed, such as in sewage plants, floodwalls, spillways, filtration plants, and numerous commercial and industrial applications.
- High resiliency with excellent recovery after compression.
- Protects against water infiltration when properly sealed.
- Easy to handle and install.
- Offers isolation capabilities.
|Thickness Widths||Slab Widths||Standard Lengths|
|¼” (6.35 mm)
3/8” (9.53 mm)
½” (12.7 mm)
¾” (19.05 mm)
1” (25.4 mm)
|10’ (3.05 m)|
- AASHTO M 153, Type II
- ASTM D1752, Type II
- Corps of Engineers CRD-C 509, Type II
- FAA Specification Item P-610-2.7
- Federal Specification HH-F-341 F, Type II, Class B
The type of control joint and spacing used will vary with each project according to the type of structure, climatic conditions, and anticipated stresses in the concrete. Thinner joints of 1/4” (6.35 mm), 3/8” (9.53 mm), or 1/2” (12.7 mm), spaced at frequent intervals, offer greater control than thicker joints spaced at greater intervals. The basic objective is to provide ample room for the concrete to expand or contract without creating damaging stresses. Expansion joints should be positioned against forms at interrupting objects or columns and against abutting structures prior to the placement of the concrete. CORK EXPANSION JOINT should be recessed 1/2” (12.7 mm) below the concrete surface to accept the joint sealant. To isolate filler from sealant, use SNAP-CAP® from W. R. MEADOWS.
SNAP-CAP should be installed flush with the surface. After removal of the top section of SNAP-CAP, the joint opening is ready for sealing with a suitable sealant from W. R. MEADOWS.
DECK-O-SEAL®, POURTHANE® NS, POURTHANE SL, and SOF-SEAL® from W. R. MEADOWS are suitable sealants for horizontal applications of CORK EXPANSION JOINT. Hot-applied sealants such as 3405 and HI-SPEC® from W. R. MEADOWS are also compatible. The recommended sealants for vertical applications are DECK-O-SEAL® GUN GRADE and POURTHANE NS.