Syntho-Glass® UP


SynthoGlass® UP

Under-pressure leak repair kit

Syntho-Glass® UP Repair System was specifically designed for under pressure leak repair applications on copper, steel, SS, PVC, FRP, concrete, rubber, and more. By combining the original Syntho-Glass® product, with the extremely chemically resistant Syntho-Steel™ and unique Pressure Sealing Rubber Tape, this offers the geometric flexibility to repair joints, tees, couplings, and pinholes. This complete system simplifies the application process and is prepackaged to accommodate pipes up to 10 inches in diameter. Larger repair applications can be engineered to meet your requirements.



  • Under pressure leaks on:
    • Leaking joints
    • Pinhole leaks


  • Repair of pipes under pressure up to 60 psi (4.1 bar)
  • No shutdown necessary
  • Simple application
  • Effective, time-saving
  • No mixing and no mess
  • Sets rock hard in minutes
  • NSF61 and BS6920 approved for potable water when Syntho-Steel™ is used as the primary sealant
Chemical Resistance ASTM D 543, Test period 2 months at 73°F (23°C)
Solution Tested Product Result
Sulfuric Acid 50% No Effect
Hydrochloric Acid 50% No Effect
Sodium Hydroxide Solution 20% No Effect
Gasoline No Effect
Toluene No Effect
Xylene No Effect
Mineral Spirits No Effect
Distilled Water No Effect


Temperature vs. Time
Average Temperature Approx Work Time Return to Service Time
95°F (35°C) 3 min. 23 min.
70°F (21°C) 8 min. 28 min.
60°F (16°C) 10 min. 1 hr. 25 min.
50°F (10°C) 14 min. 2 hrs. 42 min.
42°F (6°C) 17 min. 3 hrs. 2 min.
35°F (2°C) 20 min. 6 hrs. 21 min.


Mechanical Properties
Test Method Result
Tensile Strength ASTM D638 36,000 psi (2482.1 bar)
Lap Shear Strength ASTM D5379 900 psi (62.05 bar)
Flexural Strength ASTM D790 26,100 psi (1799.53 bar)
Dielectric Strength ASTM D149 16,000 Volts
Impact Resistance ASTM G14/G62 123 ft. lb (167J)