GSA Contract #GS-07F-6052P

Humphrys INCREDISEAL™ Seaming of Geomembrane Liners and Covers.

Geomembrane Liners

All sizes of factory panels seamed, tested and delivered by Humphrys for ultimate protection and performance!

Make Humphrys Your First Choice For All Your LINER Needs

  • Agricultural Pits and Ponds
  • Aquaculture Applications
  • Canals
  • Evaporation Ponds
  • Exposed Covers and Caps
  • Floating Covers
  • Golf Course Water Features
  • Landfills
  • Mining Applications
  • Water Conservation Applications
  • Water Reservoir
  • You name it!
Automated smooth roll-up means easy unwind at job sites

Humphrys' IncrediSeal™ Factory Seaming Process provides your customer and you with several distinct advantages over sealing by hand. Factory seams are more consistent and even. Humphrys' seamed liners reduce your labor costs because they are made to your dimensions, folded and wound-up on rolls, ready to apply at the end-site. We meticulously test each and every seam to assure the highest FGI and ASTM standards are met or exceeded.

Precision hot air welding


  • Quick delivery on all sized panels up to 100,000 sq. ft.
  • Humphrys' IncrediSeal Seaming Process of any available liner fabric
  • Quality control assurance
  • Each finished, seamed liner is tagged with a detailed record of roll stock number, seam test reports, and purchase order number for tracking and quality assurance


As a member of the Fabricated Geomembrane Institute (FGI), we strictly adhere to their recommended procedures and high standards for seam testing frequency and inspections.

  • Preproduction Seam Tests are performed on the Geomembrane material for every change in shift, personnel or fabric.
  • Sheer & Peel Testing on the first and last seams of every panel, in addition to being measured at the time of a change in shift, personnel or fabric. These processes must meet ASTM D6392 requirements before we continue.
  • Results Logged and Stored for all seam testing and visual inspections and maintained permanently as part of the job quality control report of your every order. Visit for the complete FGI test standards.

Quality and Traceability assurance

From our raw stock to your finished IncrediSeal seamed Geomembrane panels, every section is tagged with your company information, membrane manufacturer, seaming date, time and test results. This is our way of maintaining detailed electronic records of our order, assuring you of accurate accountability.


Choose from the industry's top Geomembranes

In our 160,000 sq. ft. production and warehouse facilities, we stock one of the largest inventories of Geomembrane fabrics including:

  • PVC
  • Reinforced String Polyethylene
  • Reinforced Tape Polyethylene
  • Seaman XR5 and XR3
  • Polypropylene Unreinforced
  • Polypropylene Reinforced
  • Coolthane, Coolguard, Coolpro
  • All types of Nonwovens

From these manufacturers:

  • Firestone
  • Intertape Polymer
  • Katz
  • Seaman Corporation
  • Canadian General
  • Cooley
  • Engineered Polymer Group
  • Rocheux