O'Brill Company

Construction Specialty Suppliers

       6626 N. Milwaukee Ave.

Niles, IL 60714

773-775-1122 or 847-647-0005

FAX 847-647-7819

Since 1967

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Direct Fire Parking Sealant




NO. 231-PD


Technical Description
SEALTIGHT Direct Fire Parking Lot Sealant (PLS)is formulated specifically for melting and heating in direct fire kettles. It is a single-component,hot-applied, self-leveling sealant to be used for sealing joints and cracks in Portland Cement or asphaltic concrete pavements.PLS is easily melted and applied, and will form a flexible, resilient, non-tracking seal suitable for use on both highways and parking lots.

Test Typical
Penetration,77 F     50  15-75
Resilience,%: 55% 40%(min.)
Softening point,F: 210 F 200 F (min.)
Flexibility,90 bend 1"mandrel @0 F: Pass Pass
Viscosity @400F: 500 cps
Weight/Gallon: 8.8 lbs./gal
Recommended Pouring
400 F
Maximum Safe Heating
450 F    

50 lb.cartons containing two (2)25-pound blocks individually wrapped in poly bag liners.

PLS can be reheated several times. The material will not gel when overheated or heated for extended periods. Temperatures above 400F for extended periods (over 6 hours) will begin to soften the material. If heated above 450F, the material will begin to degrade and lose its flexibility.

Surface Preparation
The joints and cracks to be sealed must be clean and dry. The cleaning operation can be performed using a router, wire brush, oil-free compressed air, sand blaster, heat lance or other acceptable method. Curing compounds on interfaces must be removed by sandblasting. Dust, dirt and laitance should be blown out of the joint with oil-free compressed air immediately preceding the sealing operation. Sidewalls must be stable and intact. Air and pavement temperatures should be above freezing at time of sealant application.

Concrete or asphaltic Pavement and Maintenance Sealing - For ideal sealing with maximum effectiveness, it is suggested that cracks or joints should 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.

Proper routing should be slightly larger than existing crack/joint to ensure proper adhesion to sidewalls.
The sealant should be applied into the crack/joint from 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.


bulletMaterial can be melted in either a direct fire or oil jacketed kettle. Kettles should be equipped with an agitator and properly functioning temperature gauges. Material can be applied by pressure applicator or pour pot.
bulletThe polymers contained in PLS can withstand temperatures up to 450 F. After melting, the material should be agitated mechanically. Material may be added as the sealant is drawn off. The product is capable of being reheated several times and will not gel when overheated or heated for extended periods.
bulletMaterial should be applied between 350 F and 450 F. The recommended application temperature is 400 F.
bulletThe crackfiller should be tack free prior to coating with a blacktop sealer.


W.R.MEADOWS,INC. warrants that at the time and place we make shipment, our material will be of good quality and will conform with our published specifications in force on the date of acceptance of the order. Read complete warranty. Copy furnished upon request.

The information contained herein is included for illustrative purposes only, and to the best of our knowledge, is accurate and reliable. W.R.MEADOWS,INC. cannot however under any circumstances make any guarantee of results or assume any obligation or liability in connection with the use of this information. As W.R.MEADOWS, INC. has no control over the use to which others may put its product, it is recommended that the products be tested to determine if suitable for specific application and/or our information is valid in a particular circumstance. Responsibility remains with the architect or engineer, contractor and owner for the design, application and proper installation of each product. Specifier and user shall determine the suitability of
products for specific application and assume all responsibilities in connection therewith.


Home Up 1100 - Clear Series 1200 - White 1300 - Clear 1600 - White 164 588 Precision Grout Ceramar Cera-Rod CG-86 Control Joints CS-309-25 CS-309-30 Deck-O-Foam Direct Fire Parking Sealant Duogard Duogard II Evapre Expo-Gloss Fibre Expansion Joint Gardox Hi-Spec Hydraset Hydraset-Free Intralok Lin-Seal Lin-Seal Emulsion Lin-Seal White Liqui-Hard Meadow-Plug Med-Cure Mel-Dek Mel-Drain DB Mel-Gard Melnar Mel-Prime SB VOC Mel-Prime WB Mel-Rol Pac-It Plastic Joint Materials Pourthane Premoulded Membrane Premoulded Tongue and Groove Protection Course PVC Waterstops Red Rosin Paper Rezi-Weld 1000 Rezi-Weld 3-2 Rezi-Weld Gel Paste State Rezi-Weld Gel Paste Rezi-Weld LV Rezi-Weld Rapid Set Roof Traffic Pads Sealex Sealmastic Sealmastic Emulsion Sealtight 1190 Sealtight 158 Sealtight 3405 Sealtight Acry-Lok Sealtight Air-Shield Sealtight CR-90 Sealtight Deck-O-Seal Sealtight Futura-15 Sealtight Kool-Rod Sealtight Meadow-Crete FNP Sealtight Meadow-Crete GPS Sealtight Meadow-Crete H2 Sealtight Meadow-Patch 20 Sealtight Meadow-Patch 5 Sealtight Meadow-Patch T1 Sealtight Meadow-Patch T2 Sealtight Patch-Prime Sealtight Poly-Grip Sealtight Poly-Jet 1614 Sealtight Poly-Jet 200-E Sealtight Poly-Jet 3406 Sealtight Premoulded Membrane Sealtight Rezi-Weld Flex Sealtight Safe-Seal 3405 Sealtight Sealex E-Z Sealtight Ultrite Degreaser Sealtight Seal Cure CS-309-25 Sewer Joint Sof-Seal Tiah Vibraflex Vocomp-20 Vocomp-25 Vocomp-30

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Copyright 2002 O'Brill Company
Last modified: August 09, 2004