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HI-SPEC
SEALTIGHT 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 140F (60C).

Uses:
HI-SPEC is recommended for large-scale sealing of joints and cracks in Portland Cement and asphaltic 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 asphaltic concrete pavements.

Advantages and Benefits:
  • PROVIDES AN ECONOMICAL HOT-POUR, SINGLE-COMPONENT SEALANT FOR LARGE -SCALE SEALING OF PORTLAND CEMENT AND ASPHALTIC CONCRETE PAVEMENTS
  • RECOGNIZED BY PUBLIC AND PRIVATE SECTOR SEALING CONTRACTORS AS "THE BEST AVAILABLE" AND "MOST COST EFFICIENT" JOINT SEALANT
  • PROVIDES TOUGH, DEPENDABLE JOINT SEALS WITH EXCEPTIONAL LONGEVITY
  • OFFERS EXCELLANT COHESSIVE AND ADHESIVE QUALITIES
  • REMAINS DUCTILE AND RESILIANT AT LOW TEMPERATURES
  • WILL NOT FLOW OR MIGRATE AT TEMPERATURES UP TO 140F (60C)

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.
CONTROLÊMATERIAL TEMPERATURES AT 370F (188C). NEVER EXCEED 390F (199C). RECOMMENDED POURING TEMPERATURE IS 370F (188C).
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 Material should be added to the melter as the sealant is withdrawn during the sealing operation.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.
CONTROLÊMATERIAL TEMPERATURES AT 370F (188C). NEVER EXCEED 390F (199C). RECOMMENDED POURING TEMPERATURE IS 370F (188C).
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.
sealcoating

Asphaltic Pavement and Maintenance Sealing:
For ideal sealing with maximum effectiveness, it is suggested that cracks or joints be routed out to provide a sealant resevoir 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.
Proper routing should be slightly larger than the existing crack/loint to ensure proper adhesion to sidewalls. The sealant should be applied into the crack/joint from the bottom up, slightly overfilling. Once applied, a follow-up should be done with a soft rubber, U-shaped squeegee to form a wipe zone of approximately 3-4 inches (76-2 - 101.6mm) wide along the crack/joint and flush with the highway or pavement surface. To control and maintain the suggested joint depth and sealant usage, SEALTIGHT CERA-ROD Heat-Resistant Backer Rod 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. SEALTIGHT CERA-ROD Heat-Resistant Backer Rod may be installed in the joint opening to control depth and sealant usage.

Precautions:
DO NOTÊDILUTE. Do not heat to temperatures above 390F (199C). Reheating or prolonged (over 6 hours) heating at or above the safe temperature of 390F (199C) could cause this material to gel in the application equipment. A rapid increase in viscosity, accompanied with stringiness, signals the approach of gelation. Should this happen, the material must be rapidly pumped from the melting kettle and discarded. Apply sealant when substrate and air temperatures are 40F (4C) or higher. 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.
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