leaking pipe ready to fix with Stop It Flat Patch

Flat Patch grinding the pipe

Flat Patch pipe repair

Stop It® Flat Patch is a leak sealant product designed for applications where localized repair is needed or full pipe wraps are impractical. The carbon fiber composite repair system quickly restores operations for storage tanks, floating lids, vessels and large-diameter pipes operating at pressures up to 1,000 psi, and provides localized corrosion inhibition.

  • Stop It® Flat Patch surface preparation consists of removing any loose scale and lubricants or greases. The surface should be relieved of all pressure until the product is fully applied and cured. Application surfaces should be dried prior to application and warmed if the pipe surface is less than 50°F or cooled if greater than 100°F.
  • Application entails mixing a pre-measured two-part sealant, wetting felt and fibrous reinforcement tape, and applying the fabrics onto the surface. Applications can be made regardless of surface orientation and result in a durable coating with superior pressure-sealing capabilities.
  • Sealant mixing takes seconds and can be immediately applied to the reinforcement tape. The wetted tape possesses a working time of approximately 8-10 minutes. The exact application time will depend on the specific conditions under which Stop It® FP is being applied.


"Thanks to InduMar's Stop It® Flat Patch, we were able to repair multiple tanks that had been out of commission, and now they are back in service."

– said one client


Contact Us to Order Stop It® Flat Patch


Technical Information

Stop It® Flat Patch Data Sheets


Tanks | Vessels | Large diameter Pipes | Valve and pump Casings | Welded Seams | Rail Cars | Roofs | and More

Standard Kit Sizes: 4" x 4" and 6" x 6" | Custom repair sizes available

Physical Properties


Shelf Life: Six months from date of purchase when stored at 40° to 83°F (5° to 28°C)
Color: Component 1 - clear Component 2 - straw
Mixing Ratio: As supplied, dual cartridge dispenser
Pot Life: 8 minutes at 72°F (22°C), after mixing for films less than ½” thick
Sealant Viscosity: Gel-like before cure

Reinforcement Fibers

3K Multifilament Continuous Tow
Tensile Strength: 510-635 KSI
Tensile Modulus: 33.0-34.9 MSI
Elongation: 1.4-1.95%


Pressure Limitation: Recommended for pressures up to 1,000 psi (70 kg/cm2, 69 bar)
Maximum Operating Temperature: 135°F/51°C following ambient cure; 175°/80°C when annealed

Chemical Resistance

Stop It® Flat Patch is recommended for pressure sealing applications involving most categories of chemicals and hydrocarbons. Extended chemical resistance data is available upon request. End users are encouraged to verify specific resistance before application.

Resistance Against

  • Inorganic Acids = Excellent
  • Chlorinated Solvents = Good
  • Bases = Excellent
  • Organics (except some acids) = Excellent

Kit Contents

  • Dual component resin cartridge
  • Static mixer
  • Felt and Reinforcement carbon fiber patches
  • Protective gloves
  • Cleanup supplies
  • Detailed application instructions