CSP Flat Band Gasket

External gaskets for jointing corrugated steel pipe

Join & Restrain Corrugated Metal/Steel Pipes

MarMac’s next generation CSP Flat Band Gaskets represent the best possible quality gaskets available. With a standard thickness of 0.5” (versus the industry standard 0.375“) and available in 12” & 24” widths, our gaskets meet or exceed virtually all the North American specs for CSP jointing materials.

Spliced CSP Flat Band Gaskets are available in 50’ rolls on 3” cores.

Features & Benefits
  • Easy installation & innovative fastening system
  • Premium closed-cell rubber meets all USA/CA specifications
  • Over 20% thicker than industry standard
  • Readily Available & customizable to size
  • Full technical & engineering support
CSP Flat Band Gasket specification - MarMac Construction Products

Half inch premier nitrile rubber-blend gasket. All typical properties of MarMac CSP Flat Band Gaskets are based on, and meet or exceed the material requirements of:

ASTM D1056, 2A3 / 2B3 / 2C3

CSP Flat Band Gaskets should be stored in a dry, cool place.

Classification2A3 / 2B3 / 2C3ASTM D 1056
Density7.0-9.0 lbs/ft3ASTM D 1056
Tensile Strength100 psi minASTM D 412 Die A
Tear Strength15 lbs/in minASTM D 624 Die C
Elongation100 % minASTM D 412 Die A
Water Absorption5 % maxASTM D 1056
Fluid Immersion100 % maxASTM D 1056 Reference Fuel B
Shrinkage (length & width, 7 days @ 158 °F)10 % maxMFG MRCS 01-1995
Compression Set (room temp)25 % maxASTM D 1056 Suffix B2
Compression Deflection 25%9.0-13.0 psiASTM D 1056
Compression Deflection 50% (60 sec hold)14.1-24.9 psiISO 3386-1
Change in Compression Deflection± 30 %ASTM D 1056

Wrap CSP Flat Band Gasket around the full circumference of the pipe joint, centering the gasket on the joint gap. Overlap the gasket sufficiently according to local and standard regulations and secure. Install appropriate metal band over the gasket, following the manufacturer’s installation procedure.


Roll widths: 12, 24″
Roll lengths: 50′
Thickness: 0.50″


Corrugated Steel Pipe

CSP Flat Band Gasket Requests

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*All statements and technical information are based on tests and/or data which MarMac Manufacturing deems reliable, however, MarMac does not warrant or guarantee the accuracy or completeness of such information. Please read further manufacturer liability and warranty information.

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