Product profile summary
ST-591 FIBROTITE is a special dry oakum in rope form which can
be used to make Reinforced Foam Seals in leaking concrete joints
and cracks. ST-591 FIBROTITE is made from selected jute which
is carefully carded to remove almost all hard fibers and undesired
contaminants. FIBROTITE rope has seven or eight strands with about
1.5 twists per foot. The loose rope is approximately two inches
in diameter and weighs about 0.4 pounds per foot.
FIBROTITE packs solidly into joints and cavities, and its double-yarn
configuration is easily unwound where thinner strips are needed.
Only dry unoiled jute is appropriate for use with Strata Tech's
hydrophilic injection resins in concrete joint sealing applications.
ST-591 FIBROTITE contains less than 8% oil by weight.
FIBROTITE is wound into a 50 pound coil and packaged in a cardboard
box. The coil can be easily pulled out of the carton by working
from the center of the coil. Each 50 pound coil can be unwound
into separate smaller strips to make approximately 1000 lineal
feet of 0.5 inch diameter strands. Each strand is loosely twisted
to allow quick absorption of its companion sealant and to provide
easy packing properties in narrow joints and small cavities.
FIBROTITE conforms to Federal Specification H.H.-P-117, Section
IV, Part 5, of the Federal Standard Stock Catalog, approved by
the Director of Procurement, November, 1940 for use by all Departments
of the Federal Government. An excerpt of the specification is
attached. Copies of the complete specification may be obtained
from the Superintendent of Documents, Washington, DC.
Activated Oakum Process was accidentally discovered by a sewer
repair crew. The men were trying without much success to seal
the annular space around a polyethylene slip line pipe that had
been installed within an older sewer pipe. In a last frustrated
attempt to stop groundwater leakage, the crew soaked jute strips
in a foaming urethane grout compound and packed them into the
space between the inner and outer pipes. To their delight, the
seal worked. In fact, the seal was so effective and so easy to
install that word of their success spread quickly. Others quickly
tried the idea in all sorts of subgrade leak situations including
large concrete pipe joints, expansion joints, manhole corbel voids,
and abandoned pipe junctions. The effective seal made by the Reinforced
Foam was dense enough to handle high head pressures yet flexible
enough to allow structural movement. Users also found the RF Seals
successfully resisted freeze- thaw attack, wet-dry cycles, vibration,
traffic impact, repeated compression-relaxation, and groundwater