Manhole Sealant Mastic sealing of pipes, manholes, tanks, precast components, wells and drains Meets ASTM C-990

Precast Manhole Sealant Mastic. Remains permanently flexible whilst providing an excellent seal.

This manhole sealant is a butyl mastic joint sealant that will stay flexible indefinitely. It is ideal for quick and effective sealing of pipes, manholes, tanks, precast components, wells and drains. A butyl-rubber based sealant, it is designed to be permanently flexible, tacky and resistant to moisture and deterioration by exposure to dilute chemical solutions.

Manhole sealant mastic Features:

· Meets ASTM C-990

· Seals quickly and effectively

· Excellent adhesion to surfaces

· Large working temperature range

· Stays permanently bonded yet maintains flexibility

· Non-toxic

· Will not oxidize or shrink

Manhole sealant mastic Ideal for:

· Manholes

· Concrete pipes

· Septic tanks

· Precast box culverts

· Wet wells

· Storm drains

How to install this manhole sealant mastic ?

• Dry joint surface if wet.(Joint surface must be dry.)
• Clean all dirt, sand, mud, etc. from joint
• Remove roll from carton.(Keep away from dirt, etc.)
• Place exposed surface down/ place against vertical surface/press against concrete
• Apply sealant in continuous ring around the joint (DO NOT STRETCH!)
• To complete sealant ring cut off excess sealant with knife or sharp object
• Cut sealant so that when cut, the ends form a butt joint.(DO NOT OVERLAP!)
• Knead the ends together to finish sealant ring
• Remove protective release paper from the sealant ring
• Assemble the joint. Align structure section as straight as possible for proper entry of the tongue into the receiving groove and home the structure section.

Mainly standard of the manhole sealant mastic: 

• ASTM C 990 – Standard Specification for Joints for Concrete Pipe, Manholes, and Precast Box Sections Using Preformed Flexible Joint Sealants; Section 6.2 Butyl Rubber Sealants
• AASHTO M 198 – Joints for Circular Concrete Sewer and Culvert Pipe Using Flexible Watertight Gaskets
• ASTM C 972 – 00(2011) – Standard Test Method for Compression-Recovery of Tape Sealant
• ASTM C 765 – 97(2015) – Standard Test Method for Low-Temperature Flexibility of Preformed Tape Sealants

Concrete surfaces to which the sealant is to be applied must be clean and dry. All mud, dirt, grease, oil, and loose particles should be removed from the surfaces. The release paper should be stripped from only one side of sealant. The outside paper should be left in place to protect the sealant from contamination and stretching. The sealant strips should be attached end to end to the leading edge of the tongue or groove of each pipe joint until a continuous gasket is established around the entire circumference of the pipe joint. The material should be pressed firmly into place through the outside release paper. The outside paper should be removed just prior to jointing the pipe. Contaminating the exposed sealant with any foreign materials should be strictly avoided. Care should be taken not to disturb the gasket placement. Any contaminated sealant should be removed and replaced and any displaced strips should be repositioned prior to jointing the pipes. See pipe manufacturer's instructions for proper pipe jointing procedures. Excess sealant may be either trimmed with a putty knife or rolled to a smooth finish. The trench can be backfilled as soon as the joining process has been completed. Clean-up Excess sealant should be scraped off surfaces. Asphalt stains can be removed with non-hazardous, bio-degradable cleaners. Waterless hand cleaner should be used on skin, following the cleaner manufacturer’s instructions carefully. Flammable or combustible petroleum based solvents should not be used.