Professional-grade joint sealing system
Unlike conventional sealants that harden or deteriorate over time, Butyl Rope Sealant retains its resilient properties, even when subjected to the rigors of freeze-thaw cycles and UV exposure. This remarkable durability stems from advanced polymer cross-linking technology developed through years of laboratory testing and real-world application experience. The non-drying, non-hardening formula creates a permanently tacky seal that resists cracking and adhesion loss.
Key Features & Benefits
Permanent Flexibility
Superior Adhesion
Non-Hardening Formula
Water Resistance
Creates a watertight seal that prevents moisture infiltration even under hydrostatic pressure
Chemical Resistance
Withstands exposure to acids, alkalis, and other common environmental chemicals
Easy Application
The malleable consistency in easy-to-manage rolls makes installation a breeze
Butyl Rope Sealant’s exceptional gap-filling capability allows it to conform perfectly to irregular surfaces and joint configurations, creating custom-fitted seals that conventional products simply cannot match. Its proven track record in demanding applications across diverse climate zones has established Butyl Rope Sealant as the trusted industry standard for professional contractors seeking reliable protection for structural joints and connections in both new construction and rehabilitation projects. When failure is not an option and long-term performance is essential, discerning builders consistently choose MARMAC® Butyl Rope Sealant (C990) as their professional-grade waterproofing solution.
| DIAMETER | LENGTH | CARTON QTY |
|---|---|---|
| 0.75″ | 174′ | 8 |
| 1.00″ | 174′ | 6 |
| 1.25″ | 174′ | 4 |
| 1.50″ * | 131′ | 4 |
*Special order only
Meets all requirements of ASTM C 990 Section 6.2. Meets requirements of AASHTO M-198 with the exception of flash point and fire point.
Not recommended for use in areas of concentrated oils or hydrocarbon solutions. Prior to working with MarMac Butyl Sealant, consult the product label and Safety Data Sheet (SDS) for necessary health and safety precautions.
During testing method ASTM C 990 for chemical resistance, MarMac Butyl Sealant (C990) had no visible change after 30 days of immersion in 5% solutions of HCI, H₂SO₄, NaOH, KOH, or H₂S. Upon testing in accordance with ASTM C 765, Butyl Sealant had no sag or shape change after 14 days when tested at 158°F for elevated temperature flow, and did not experience cracking or adhesion loss when tested at -10°F for low temperature flexibility.
| APPLICATION PROPERTIES | MIN | MAX |
|---|---|---|
| Service Temperature Range | -40 °F | 250 °F |
| Application Temperature | 20 °F | 120 °F |
| VALUE | METHOD | |
| Color | Black | Visual |
| Hydrocarbon Content | 51 % min | ASTM D297 |
| Ash Content | 35 % min | AASHTO T111 |
| Specific Gravity | 1.15 – 1.40 | ASTM D71 |
| Ductility | 5.0 cm min | ASTM D113 |
| Compression Index @ 77°F | < 100 lbs/in3 | ASTM C972 |
| Compression Index @ 32°F | < 200 lbs/in3 | ASTM C972 |
| Cone Penetration @ 77°F | 55 – 85 dmm | ASTM D217 |
| Cone Penetration @ 32°F | 35 – 65 dmm | ASTM D217 |
| Chemical-Resistance* | Pass | ASTM C990 |
| Low Temperature Flexibility | Pass | ASTM C765 |
| Elevated Temperature Flow | Pass | ASTM C765 |
| Flash Point | 375°F (191°C) | ASTM D92 |
| Volatile Matter by Weight | < 2 % | ASTM D6 |
| Recycled Content by Weight | ≤ 7.5 % |
*30-day immersion exposure to 5% solutions of HCl, H2SO4, NaOH, KOH, H2S
Butyl Sealant (C990) should be stored in its original packaging (shelf life 2 years), out of direct sunlight, protected from the elements. Material should be kept away from direct heat, sparks and open flame. For optimum results, store in a tepid (60-80° ̊F) environment prior to installation. Storage temperature should not exceed 120°F (49°C).
The surface of the structure to be sealed should be dry and clean of dirt and debris. Take a roll of MarMac Butyl Sealant from case and avoid touching the sealant to dirt and other materials on the job site to ensure proper adhesion. Apply Butyl Sealant with exposed sealant against the concrete structure and apply around the joint without stretching. Cut to length and complete seal by butting the cut ends without overlapping and molding the ends together. Remove the protective release paper by peeling it away from the sealant. Set the joint properly with the sections aligned and straight. MarMac Butyl Sealant will adhere to the concrete surface and fill the annular space in a uniform manner between the tongue and groove when the pieces are properly joined. MarMac’s RB Adhesive Primer is recommended for installations below 40°F (4°C).
AVAILABILITY
Diameters: 0.75, 1.00, 1.25, 1.50″
Roll lengths: 174, 131′ (1.50″ only)
APPLICATIONS
Manhole Joints
Septic Tanks
Box Culverts
Reinforced Concrete Pipe
Concrete Valves
Utility Vaults
Vertical Panel Structures
Metal Sheeting
Trust MARMAC® Butyl Rope Sealant (C990) for professional-grade joint protection that delivers reliable performance year after year. For detailed application instructions or technical support, contact our expert team today.
