Joint sealant compound: FS SS-S-00210, preformed, flexible, self-adhering,
cold-applied. Joints between manhole base and riser, between risers,
between riser and cone, between cone and adjusting rings and cast-iron
frame, shall be made of RUB'R-NEK, a flexible plastic gasket-type
sealant manufactured by K. T. Snyder Company, Inc., of Houston, Texas,
or approved equal.