Welcome to Allen-Jac Inc.

Certified Aluminum Welding & Fabrication

Backed by more than 40 years of experience, the highly skilled team at Allen-Jac offers premium quality fabrication and repair for diesel fuel tanks.

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What We Do Best

For over 40 years, Allen-Jac Inc. has been fabricating and repairing aluminum diesel fuel tanks for clients across the United States. Our unmatched welding and fabricating skills ensure top-of-the-line quality, backed by our impressive product warranties. Every tank we produce at Allen-Jac is pressure tested and meets FMCSA standards.

  • Fuel Tank Fabrication
  • Combo Tanks Built to Spec
  • Hybrid Diesel Fuel / Hydraulic Fluid Tanks
  • Damaged Tank Repair
  • Aluminum Welding
  • Aftermarket Manufacturing
  • Delivery or Onsite Pickup

Serving Customers Nationwide

We're located in Sandpoint, ID but Allen-Jac serves semi trucking operations and anyone in need of diesel fuel tanks across the United States. Learn more about our customers below.

Our Customers