Summit Oilfield Lubricants & Sealants
Master HJ-Seal
725 — Downhole Tubing Sealant for Smaller Leaks

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Product Information
Downtime and shutdown of equipment are eliminated with Master HJ-Seal 725. This product is used in the oilfield, petrochemical and general industries to reduce or completely seal leaks up to .10 inches in tubing, casing, line pipe and pressure control equipment. While sealing with differential pressure, 725 seals under high or low pressure and does not restrict the production flow. The seal is both flexible and permanent. Master HJ-Seal remains effective up to 500°F (260°C).
This product is available in weight of 5 gal - 50 lbs.
- Excellent sealing of leaks — controls leaks in operating systems
- Eliminates downtime and shutdown of equipment
- Easily mixes with fresh or salt water
- Seals by differential pressure under high or low pressure
- Flexible, permanent seal that does not become brittle
- Does not restrict the production flow
- Remains effective up to 500°F (260°C)
Typical Observations
| Color | Red |
| Odor | Mild |
| Active Component | PTFE |
| Manufacturing Process | Fluoromation |
| Density, lb/gal @ 77°F (25°C) | 11.0 |
| Specific Gravity @ 77°F (25°C) | 1.32 |
| Flash Point, ASTM D-92 | 245°F (118°C) |
| Shelf Life (unopened container) | One year |
Need the original sheet with typical observations? View the catalog spec sheet for this product.
