Swepco Bituminous Compounds

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Swepco Heavy Duty Patching Compound is widely used for the repair and sealing of roof areas subject to leakage.
Particularly suitable for the repair of gutter joints and other areas with possible movement it can be used in conjunction with SWEPCO Patching Fabric.
Many Roll Roofing Installers are using Heavy Duty Patching for end finishing and finishing off around penetrations, it is a perfect replacement for Bostik 1313 Mastic.
Bostic 1313 Mastic is a heavy bodied, semi stiff trowel application, bitumen based mastic compound.
Heavy Duty Patching Compound has many additional benefits such as NON-flammable when cured, does not melt or run, will NOT support combustion, UV stable, will provide a long term positive seal.
It is one of the few products which will seal Butyl Rubber Membranes.

Swepco Heavy Duty Patching Compound® Product Information

• Versatile, all-purpose fibred patching compound.
• Stays flexible longer.
• Resistant to cracking and splitting.
• Ideal for new or old flashing work and all types of spot repairs.
• UV Stable.

Formulated for the tough waterproofing jobs.
Heavy Duty Patching Compound is a thick, black, waterproofing compound manufactured from “Heart of Texas” Asphalt®, High Strength Micro Fibers, Dia-SealTM, finely milled blue-black slate and two highly effective chemical additives, ZHD-7TM and ZonamineTM. It is used with other SWEPCO Roofing Products in a number of various applications to provide complete roof protection. Consult the appropriate application literature for more information. It is also used as a highly versatile adhesive, sealer and filler in general roof maintenance.
It takes a tough product to provide reliable waterproofing at edge, wall and protrusion flashings. Stresses concentrated in these areas can quickly destroy inferior patching materials. Just as difficult is finding a patching materia that works well in all repair situations... tough ones such as blisters, cracks and metal seams. Heavy Duty Patching Compound is the answer for both new roof construction and routine HEAVY DUTY maintenance... a heavy-duty, asphalt-base waterproofing mastic, manufactured from specially selected and refined “Heart of Texas” Asphalt, High Strength Micro Fibers, select mineral stabilizers and reinforcers and two special SWEPCO additives which inhibit oxidation and promote better bonding. Used before leaking occurs, Heavy Duty Patching Compound seals, reinforces and waterproofs problem areas.
Superior resistance to cracking & tearing.

Heavy Duty Patching Compound has superior resistance to cracking and tearing under normal roof stresses because it stays flexible and pliable longer.

The specially selected “Heart of Texas” Asphalt provides flexibility, bondability and weatherability not found in common waterproofing asphalt. As a result, Heavy Duty Patching Compound has more resistance to the normal roof stresses which cause most repairs to fail.
Stays flexible longer because it’s fortified with ZHD-7.
Oxidation is one of the major causes of failure of asphalt waterproofing materials, causing age hardening, embrittlement and cracking. But Heavy Duty Patching Compound is formulated with ZHD-7, SWEPCO's highly effective chemical oxidation inhibitor. ZHD-7 slows down the natural aging process. In the heated state produced by ultra-violet radiation, the free oxygen molecules which cause oxidation react more readily with the ZHD-7 than with the asphalt. Much of the available oxygen is actually consumed by ZHD-7 before it can harm the asphalt. And the process is a continuous one, because, as ZHD-7 reacts with the available oxygen, it forms a new molecular arrangement which continues to consume more of the harmful free oxygen molecules. Result -- the completed repair or flashing assembly retains its flexibility and pliability longer.

High Strength Micro Fibers add strength & durability. High Strength Micro Fibers are added to increase strength and durability, as well as enhance
temperature stability. The fibers stay evenly distributed throughout Heavy Duty Patching Compound, both in the container and on the roof, to provide uniform strength, durability and temperature stability.
Two other superior mineral stabilizers, Dia-Seal and Finely Milled Blue-Black Slate, are also added to further improve tensile strength and resistance to erosion and abrasion. This highly effective combination of three of the finest mineral stabilizers and reinforcers available adds measurably to the overall durability and weatherability of Heavy Duty Patching Compound.
Zonamine promotes superior bondability. Another special SWEPCO additive, Zonamine, promotes formation of a tight, strong, durable and uniform bond every time . . . the kind of strong bond that resists peeling, shrinking and delamination. Zonamine also permits effective use of Heavy Duty Patching Compound for temporary emergency repairs on clean, wet surfaces.
Exceptional ease & versatility.
Use it for long lasting roof maintenance and new flashing work. Works on asphalt, concrete, masonry, metal and wood. Seal cracks, blisters, open seams and either new or deteriorated flashings at vents, skylights, pitch pans, metal seams, gravel guards and flashing flanges. Caulk small cracks, copings, counter flashings, drainage gutters and other common trouble spots. The smooth troweling consistency makes it easy to use straight from the container.
 

PATCHING FABRIC
Heavy Duty Patching Fabric is a strong reinforcing material designed for use with Heavy Duty Patching Compound. It reinforces Heavy Duty Patching Compound repair work just as steel is used to reinforce concrete. Embedded between layers of Heavy Duty Patching Compound, it strengthens repairs to help prevent cracking and splitting. It exceeds the requirements of U.S. Federal Specification H-C-466, Type 1 and ASTM Designation D-1668, Type 1.

Tough, glass fiber mesh.
Heavy Duty Patching Fabric is an inorganic mesh, coated with a high quality waterproofing resin. It is many times stronger than most original roofing felts and is highly resistant to heat, rotting, mildew, tearing and other forms of deterioration. The open weave design allows Heavy Duty Patching Compound to thoroughly penetrate the fabric for a strong, durable repair job.
Ideal for all patching jobs.
Heavy Duty Patching Fabric is the perfect material for strengthening repairs of edge, wall and protrusion flashings at vents, skylights, pitch pans and other roof fixtures. It is also excellent for repair of blisters, cracks, open seams and seams in metal roofs.

Easy to use.
Rolls on smoothly without warping, shrinking, wrinkling or tearing. Conforms to most shapes and is easily cut to fit those hard-topatch places on the roof.

TYPICAL PHYSICAL PROPERTIES
Consistency, Cone Penetration, @ 77°F (25°C), ASTM D-217 ................................... 280
Specific Gravity, @ 60°F (15.5°C), ASTM D-70 ............................................................ 1.11
Unit Weight, lb/gal, ASTM D-70 ................................................................................... 9.24
Unit Weight, kg/liter, ASTM D-70 ................................................................................ 1.11
Drying Time, to Touch, hours........................................................................................... 1-2
Drying Time Through, hours ............................................................................................. 24
Flash Point, °F, min, T.O.C., ASTM D-3143 .................................................................. 105
Wet Film Thickness, 9.3 lb/100 ft2, mil ............................................................................ 16
Wet Film Thickness, 1.12 kg/m2, mm ................................................................................. 1
Dry Film Thickness, 9.3/100 ft2, mil .............................................................................. 10.1
Dry Film Thickness, 1.12 kg/m2, mm ............................................................................ 0.62
Color ................................................................................................................................ Black
Odor ........................................................................................................... Petroleum Naptha
TYPICAL PERFORMANCE PROPERTIES
Workability, ASTM D-2822, 6.2 ................................................................ Trowels smooth
Behavior, @ 140°F (60°C), ASTM D-2822, 8.5
......................................................................... No blistering, sagging or slide >.25" (6mm)
Pliability, @ 32°F (O°C), ASTM D-2822, 8.6 ........................... No cracking or separation
Adhesion to Dry Surfaces, ASTM D-3409 ............................................................ Excellent
Adhesion to Wet Surfaces, ASTM D-3409 ........................................................... Excellent
Accelerated Weathering, hours, ASTM G-53 ............................................................3,000*
Film Appearance ......................................................................................................... Good
Peeling and Chipping ................................................................................................. None
Erosion ........................................................................................................................... Slight
Water Penetration ..........................................................................................................NIL
Chalking ........................................................................................................................... None
Storage Stability ....................................................................................................... Indefinite
TYPICAL CHEMICAL PROPERTIES
Non Volatiles, % wt, ASTM D-2822, 8.2 ......................................................................... 70
Volatile, % wt, ASTM D-2822, 8.2 .................................................................................... 30
Asphalt Portion Soluble in CS2, %wt, ASTM D-4 ...................................................... 99.9
Water Content, ASTM D-95 ............................................................................................NIL
Resistance to Mild Acids and Alkali ............................................................................ Good
Resistance To Water ................................................................................................. Excellent
Resistance to Petroleum Solvents .................................................................................. Poor
Vehicle, % wt (Asphalt & Solvents), ASTM D-2822, 8.2 ............................................. 66
Mineral Stabilizers and Additives, % wt, ASTM D-2822, 8.3 ...................................... 34
*NOTE: This is roughly equivalent to six years exposure to ultra-violet radiation, heat and moisture
generally encountered in field service.
APPLICABLE SPECIFICATIONS (meets or exceeds performancerequirements)
ASTM Designation D-2822
U.S. Federal Specification SS-C-153C
Canadian Government Specification Board Standard 37.5-M89

Application Information
IMPORTANT: Heavy Duty Patching Compound is a thick, black, heavybodied waterproofing compound, designed as an adhesive, sealer and filler for new roofing, roof repair and roof maintenance. In emergencies, Heavy Duty Patching Compound is exceptionally effective for repairs on wet surfaces. However, when making roof repairs of a permanent nature, do not roof on a wet or damp roof surface.
PREPARATION:
The roof surface should be sound and should drain water freely. Because standing water accelerates deterioration of all asphalt roofing products, every effort should be made to isolate and correct the causes of any standing water or ponding on the roof. A minimum slope of 1/4 in per foot (2%) is recommended. When this is not possible, SWEPCO Products can still be applied and will provide temporary protection for such areas. However, it must be understood that performance of SWEPCO Products cannot be guaranteed in any area of the roof subject to standing water. The surface to be repaired must be thoroughly cleaned free of all dust, dirt and loose debris. On gravel, granule or other aggregate covered asphalt surfaces, all embedded aggregate must be scraped or spudded off the area to be repaired and a minimum of 4 in. (10.16 cm) around the area to be repaired to create a smooth, bondable surface. On metal surfaces, surface impurities such as rust and corrosion should be removed by wire brushing.
APPLICATION:
Heavy Duty Patching Compound is applied straight from the container with a plastic glove or a standard trowel. It requires no heating or thinning prior to application. In cold weather, it can be brought to application consistency by placing the container in a warm room for 72 hours prior to use. A caulking gun is included with cases of tubes. Complete instructions are printed on the tubes. Reinforcing flashings and deteriorated areas with Heavy Duty Patching Compound and Patching Fabric is a three-step process. First, trowel a layer of Heavy Duty Patching Compound over the area to be repaired. Second, embed a piece of Heavy Duty Patching Fabric in the appropriate width into this layer of Heavy Duty Patching Compound. Third, trowel another layer of Heavy Duty Patching Compound over and beyond the Heavy Duty Patching Fabric on all sides. The width of Heavy Duty Patching Fabric required is determined by the type andsize of the repair. Instructions for some of the more common uses follow:
REPAIRING FLAT EDGE AND FLANGE TYPE PROTRUSION FLASHINGS
- Patching Compound and Fabric must extend a minimum of 4 in. (10.16 cm) beyond existing flashing materials or 4 in. (10.16 cm) beyond metal flange anchoring metal work, whichever is greater.
REPAIRING RAISED EDGE, WALL OR CURB TYPE PROTRUSION FLASHINGS
- Patching Compound and Fabric must extend well up under counter flashing and a minimum of 4 in (10.16 cm) beyond existing flashing materials or 4 in (10.16 cm) onto flat roof membrane, whichever is greater.
REPAIRING BLISTERS - Distorted roofing felts causing a blister or bulges should be cut out, being careful to remove only enough of the original roof membrane to create a flat, sound surface. Allow sufficient time for any water vapor or trapped moisture to evaporate thoroughly. Patching Compound and Fabric should overlap sound existing surface a minimum of 4 in. (10.16 cm) on all sides.
REPAIRING CRACKS, CUTS, TEARS AND OPEN SEAMS - Permit any entrapped vapor or moisture to evaporate before repairing the area.
Patching Compound and Fabric should overlap sound existing surface a minimum of 3 in. (7.5 cm) on all sides.
SEALING JOINTS IN EXPOSED METAL ROOFS - Patching Compound and 6 in. (15.24 cm) wide Patching Fabric are usually sufficient for this application.
MINIMUM COVERAGE RATES: The amount of Heavy Duty Patching Compound required depends on the width of Heavy Duty Patching Fabric used:
When Using 6 in. (15.24 cm) Fabric ................... 0.50 lb./lineal ft. ( .74 kg/m)
When Using 12 in. (30.48 cm) Fabric .................. 1.00 lb./lineal ft. (1.49 kg/m)
When Using 36 in. (91.44 cm) Fabric .................. 3.00 lb./lineal ft. (4.46 kg/m)
NOTE: These coverage rates are our minimum coverage rates. Do not under apply the product as this can adversely affect product performance and will negate any guarantee to which the product may be subject.
CURING: The curing rate of Heavy Duty Patching Compound varies with temperature and humidity. However, it is normally completely cured within
60 to 90 days.
CLEAN-UP: Heavy Duty Patching Compound can be removed from tools and other areas with kerosene or mineral spirits.
STORAGE: Heavy Duty Patching Compound in bulk containers has an indefinite shelf life provided containers are kept tightly sealed and protected
from high temperatures. In tubes, the shelf life is approximately one year.
ADDITIONAL INFORMATION: For additional information or recommendations, contact: Swepdri International
SAFETY PRECAUTIONS:
Avoid contact with eyes.
Avoid prolonged or repeated contact with skin. Wear protective goggles, gloves and clothing.
Avoid prolonged breathing of vapors.
Use with adequate ventilation or approved respirators in confined areas.
Do not take internally.
Store and use away from heat, open flame or spark sources.
Close container tightly after each use.
Do not transfer to unlabeled or breakable containers.
Use only for purposes intended. Keep out of reach of children.
EFFECTS OF OVEREXPOSURE:
Contact with eyes or prolonged or repeated contact with skin can cause irritation and inflammation.
Prolonged breathing of vapors can cause respiratory difficulty, dizziness, headache, nausea, irritation of nose or throat, drowsiness, fatigue, pneumonitis, pulmonary edema or central nervous system depression. Ingestion can cause symptoms similar to inhalation;
aspiration into lungs can cause serious injury or death.
FIRST AID PROCEDURES:
Eye Contact - Flush with water for 15 minutes. If pain or redness persists, seek medical attention immediately.
Skin Contact - Wash with soap and water after wiping off excess material.
If irritation persists, seek medical attention.
Inhalation - Remove to fresh air. If breathing difficulty persists, give oxygen or resuscitate and SEEK MEDICAL ATTENTION IMMEDIATELY.
Ingestion - DO NOT induce vomiting. If vomiting occurs, keep head below hips to prevent aspiration. SEEK MEDICAL ATTENTION IMMEDIATELY.
PHYSICAL EMERGENCY PROCEDURES:
If ignited, extinguish with CO2 or dry chemicals. Water or foam may cause frothing. Water may be used to keep containers cool or flush spills away from area of involvement.
Consult Material Safety Data Sheet (MSDS) for this product or call Swepdri Internationalfor further health and safety information.