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No. 221 |
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Description
HI-SPEC Polymeric Hot-Applied
Sealant is a premium-quality, single-component joint sealing compound.
It is formulated with a carefully balanced blend of 100% virgin
polymer, asphalt, plasticizers and inert, reinforcing fillers
to produce a hot-pour joint sealant with excellent bonding properties,
high resiliency, ductility and resistance to degradation from
weathering. It will not become brittle at low temperatures; will
not flow or migrate from the joint at temperatures up to 140ºF
(60ºC).
Uses
HI-SPEC is recommended
for large-scale sealing of joints and cracks in Portland cement
and asphalt concrete pavements because of its excellent cost efficiency,
long sealant life and high return on investment. Typical applications
include sealing expansion and contraction joints in concrete highways
- both transverse and longitudinal - joints between concrete pavements
and asphaltic shoulders and random cracks in both Portland cement
and asphalt concrete pavements.
Features and Benefits
Packaging
50 lb. (22.7 kg) container
55 lb. (24.95 kg) cartons. Each carton contains two 27.5 lb. (12.475
kg) buns in polypropylene liners.
Specifications
ASTM D 3405
ASTM D 6690, Type I, II and III
AASHTO M 301
Federal Specification SS-S-1401C
FAA Specification Item P-605
Corps of Engineers CRD-C 530
Coverage
72.2 lbs./ft. (1,158 kg/m).
A joint 1/2" x 1/2" (12.7mm x 12.7mm) will require 12.6
lbs./100 linear feet (18.5 kg/100m).
TECHNICAL DATA
| Pour point | 370ºF (188ºC) |
| Prolonged heating | 6 hours |
| Penetration | Less than .90 cm |
| Flow | Less than .3 cm |
| Bond |
Passed 100% extension @ 0ºF(-17ºC) Passed 50% extension @ -20ºF (-29ºC) |
| Resiliency | More than 60% |
|
Asphaltic Concrete Compatibility |
Compatible |
Application Tools
 Air Compressor |
 Melter-Applicator with Applicator Wand |
 Router |
APPLICATION
Melting…
HI-SPEC should be melted in a conventional double-boiler, oil-jacketed
melter-applicator equipped with an agitator and separate control
thermometers for both the oil bath and melting vat. On start-up
of the melting kettle, add small quantities of HI-SPEC with the
plastic bag liner to the melter.
CONTROL MATERIAL TEMPERATURES AT 370ºF (188ºC). NEVER EXCEED 390ºF (199ºC). RECOMMENDED POURING TEMPERATURE IS 370ºF (188ºC).
Only melt enough material to be poured the same day. Material should be added to the melter as the sealant is withdrawn during the sealing operation.
Surface Preparation… The joints and cracks to be sealed must be clean and dry. Dust, dirt and laitance should be removed prior to application. Proper routing should be slightly larger than the existing crack/joint to ensure proper adhesion to sidewalls.
Asphalt Pavement and Maintenance Sealing - For ideal sealing with maximum effectiveness, it is suggested that cracks or joints be routed out to provide a sealant reservoir 1/2" (12.7mm) wide with a minimum depth of 1/2" (12.7mm). This provides for a 1:1 width-to-depth ratio. For joints 1" (25.4mm) wide, the suggested depth is 1/2" (12.7mm) minimum. To control and maintain the suggested joint depth and sealant usage, CERA-ROD™ Heat-Resistant Backer Rod from W. R. MEADOWS may be installed in the joint opening.
New Concrete Pavement Sealing - Typical joint configuration should be 3/8" (9.54mm) wide with a 1/2" (12.7mm) depth for an approximate 1:1 width-to-depth ratio. Designated joint width and depth is determined by the appropriate highway or pavement authority. W. R. MEADOWS CERA-ROD™ Heat-Resistant Backer Rod may be installed in the joint opening to control depth and sealant usage.
Application Method...Apply sealant when substrate and air temperatures are 40ºF (4ºC) or higher. HI-SPEC should be applied into the crack/joint, slightly overfilling. Once applied, a follow-up should be done with a soft rubber, U-shaped squeegee to form a wipe zone of approx. 3-4 inches (76.2-101.6 mm) wide along the crack/joint and flush with the highway or pavement surface.
Precautions
DO NOT DILUTE. Do not heat
to temperatures above 390ºF (199ºC). Reheating or prolonged
(over 6 hours) heating at or above the safe temperature of 390ºF
(199ºC) could cause this material to gel in the application
equipment. A rapid increase in viscosity, accompanied with stringiness,
signals the approach of gelling. Should this happen, the material
must be rapidly pumped from the melting kettle and discarded.
For optimum sealant performance all material left in the melter-kettle
should be drawn off and discarded. Lines should be flushed out
clean. Do not dilute with solvent. Read and follow application
information and precautions. Refer to Material
Safety Data Sheet for complete health and safety information.
This material last updated July, 2004.
