EZ STIK Trowelable Sealant

EZ-STIK Trowelable Sealant

EZ Stik #3 Trowelable Butyl Sealant is a uniquely formulated butyl sealant in trowelable form instead of rope form, like PRO-STIK and EZ-STIK.

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EZ-STIK’s primary uses are as a backplaster on manhole and box culvert joints and as an external manhole chimney seal. Instructions for the chimney seal application/instructions can be found in the drop down box on the right. The product is all well suited for sealing grade rings. Butyl rubber has good adhesion to concrete surfaces and remains permanently flexible.

Features and Benefits

  • Excellent gap-filling and crack-filling qualities
  • Remains permanently flexible
  • Good adhesion to dry concrete, commonly specified concrete coatings, steel, glass, or painted surfaces
  • Contains high-quality butyl rubber base

Typical Applications

  • Sanitary Manhole Joints
  • Stormwater Manhole Joints
  • Irrigation and Drainage Systems
  • Box Culverts
  • Elliptical/Arch Pipe
  • Architectural Foundations
  • Underground Utility Vaults
  • Stormwater Treatment Structures
  • Stormwater Inlet Structures
  • On-Site Treatment Tanks
  • Grease Interceptors
  • Wet Wells

TROWELABLE EZ-STIK #3 is available in 5 gallon pails or in cartons of 12 – 11 ounce caulking tubes.
Must ship via truck freight due to flammability.

This sealant meets or exceeds:

  • Federal Specification TT-S-001657 for Solvent Release Butyl Sealants
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Coverage …………… @ .25” Thick 7 sq. ft./gal.
Tack-Free Time ……. Less Than 3 Hours: ASTM D-237
Cure Time …………. Fully Cured Within 21 days at 77º ± 5ºF
Color ……………….. Black
Specific Gravity ……. 1.17 ± .05
Solids Content …….. 75.0 ± 3%
Boeing Sag ………… 0.05” Maximum: ASTM D-2202
Viscosity …………… 55 ± 15 Seconds: ASTM D-2452
Flash Point ………… 52ºF
Shelf Life ………….. One Year Minimum
Water Resistance ….. Excellent. Will not lose adhesion when exposed to 100% relative or water immersion over an extended period of time.
Acid Resistance …… Excellent. No visible sealant damage after 30 days of immersion in 20% sulfuric, hydrochloric or nitric acid.


  1. Clean and dry the concrete surface to which the sealant will be applied. Remove any dirt and/or mud adhering to the surface.The surface must be dry for the sealant to adhere and bond to the concrete. #4 EZ Primer can be applied to the surface to increase adhesion of the #3 EZ-STIK
  2. The sealant should be applied with a smooth-edge trowel. Then it should be applied a minimum of 1/4” thick. The surface to be protected must be totally covered with no surface showing through the sealant. Coverage is 7 square feet per gallon when applied 1/4” thick.
  3. When using this sealant as an external chimney seal (Butyl Rubber Backplaster), apply it 6” from below the top cone to the casting. Then it should be applied 1/4” thick with a smooth-edge trowel. After coating the chimney, with the sealant, wrap the applied #3 EZ-STIK with a 6mm polyethylene plastic sheeting by Visqueen or approved equal. Wait 20 minutes before back-filling.
  4. The structure should not be back-filled for a minimum of 20 minutes after coating with the sealant. This allows the solvents to dispense throughout the #3 EZ-STIK.