ATL GT-BD-001 Cork Fuel Cell Gasket (formerly TF550), Fuel-Resistant Fill Plate & Valve Housing Seal

ATL GT-BD-001 Cork Fuel Cell Gasket (formerly TF550)

Genuine ATL (Aero Tec Laboratories) replacement gasket in cork — the standard, cost-effective sealing material for fuel cell fill plates, filler necks, and valve housings. This is the correct service gasket for ATL components using this pattern, sealing the joint between the fill plate or valve housing and the fuel cell for a reliable, leak-free connection.

ATL part number GT-BD-001, which supersedes the former part number TF550. Same gasket, updated ATL numbering — if your parts list, cell paperwork, or an older invoice calls out TF550, GT-BD-001 is what you order now.

Cork vs. Viton — Which Do You Need?

• GT-BD-001 (this gasket) — Cork: the standard, economical choice for gasoline and pump-fuel applications. Cork conforms well to sealing surfaces and gives a dependable seal at the fill plate. Ideal for routine rebuilds on cells running conventional gasoline.
• GA-BD-001 — Viton: the premium fluoroelastomer upgrade for cells running ethanol/E85, methanol, or alcohol race fuels, or where maximum resistance to fuel attack and long service life is wanted.
• Both are the same pattern — pick your material by fuel type and budget. Running alcohol or E85? Choose the Viton GA-BD-001. Running pump gas and rebuilding on a budget? The cork GT-BD-001 is the traditional answer.

Typical Uses

• Fits Formula Mazda, Formula Ireland, Peugot and other cells.
• ATL fuel cell fill plate to bladder/container sealing
• Filler neck and filler cap base gaskets
• Valve housing and vent valve sealing
• Fuel pickup / sender / probe plate sealing on matching ATL patterns
• Replacing a worn, compressed, or leaking original gasket during a cell rebuild or FIA bladder re-certification

Specifications

Installation Notes

• Inspect and replace the gasket any time the fill plate or valve housing is removed — a reused, compression-set cork gasket is a common source of fuel weeps.
• Ensure sealing surfaces are clean and free of old gasket material, grease, or debris before fitting.
• On fill plates, torque the bolts evenly in a crisscross pattern to seat the gasket uniformly, and remember ATL’s static-ground-strap bolt location (clean off any paint/anodizing at that hole for conductivity).
• Cork seals on clamp load — avoid over-torquing, which can crush and split a cork gasket, and do not add sealant unless specified.