Posted by Robert Hernandez on Jan 7th 2025
Is Purge Paper soluble in JP-4 or JP-5 jet fuel?
FAQ
Short Answer
No. Purge paper does not dissolve in jet fuel.
Details
Purge paper and purge film are designed to dissolve in water, not fuel. Jet fuel contains little to no water, so these materials will not break down.
Instead of dissolving, the material will:
- Remain intact
- Break apart unevenly
- Form sticky or gummy clumps
This can create contamination or flow issues in fuel systems if not properly removed.
Shop Tip
If your application involves fuel systems, do not rely on purge paper to dissolve. Always remove it completely after welding.
Bottom Line
Purge paper only dissolves in water. It will not dissolve in jet fuel and must be removed to avoid contamination.
