PermaFusion
Glass-Fused-To-Steel Tanks · Municipal Tank Works
A Municipal Tank Works, LLC BrandBolted GFS · Worldwide

Glass
fused
to steel.
For the next sixty years.

PermaFusion is the proprietary glass-fused-to-steel bolted tank system of Municipal Tank Works, LLC — a vitreous enamel fired into the steel at 1,560 °F, not painted on it. One tank, one coating, one service generation longer than any powder-coat, liquid-epoxy, or concrete alternative.

65+
years · Service life · potable
6H
Mohs · Coating hardness
4,200+
global · Tanks in service
PermaFusion glass-fused-to-steel bolted tank standing in an industrial plant
IX-BL · Industrial Process ReserveObsidian Enamel · Fused Glass
Detail illustration showing glass fused to a steel substrate
Service/Potable water/Wastewater / SBR/Landfill leachate/Fire protection/Anaerobic digester/Industrial liquid/Brine · leach/Agri-biogas
The Fusion Process

Not a coating.
A fused state of the steel.

Epoxy is a film. Powder coat is a film. Liquid coatings are films. They dry, and every day of service after that is a slow failure of adhesion. PermaFusion is not a film — it is a vitreous glass fired into the steel at 1,560 °F, chemically inseparable from the plate it becomes. It does not chalk, does not blister, does not delaminate. It cannot.

01

Mill-clean steel

ASTM A1011 HSLA steel is robotically abrasive-blasted to SSPC-SP10 white metal, then chemically phosphated for enamel uptake within four minutes.

02

Ground coat · 925 °F

A cobalt-rich frit slurry is curtain-coated onto both faces and fired at 925 °F. Metallic oxides chemically bond into the steel surface, creating a nickel-cobalt interlayer rather than a painted interface.

03

Cover coat · 1,560 °F

Two additional vitreous enamel cover coats are wet-sprayed and fused in sequence at 1,560 °F. Each coat adds 3–4 mils of glass; the panel leaves the oven a single molecular stack — steel, interlayer, glass.

04

Holiday-tested

Every panel is wet-sponge holiday-tested at 1,500 V DC to a zero-defect standard before it earns its serial etch and its place in the crate. Nothing ships that would not pass AWWA D103 field inspection.

Coating Stack · Interior Face
Vitreous cover coat II4 mil · 1,560 °F fired glass
Vitreous cover coat I3 mil · 1,560 °F fired glass
Nickel-cobalt ground coat3 mil · 925 °F interlayer
Substrate · ASTM A1011 HSLA3 / 16" – 1 / 2" mill-clean plate
Nickel-cobalt ground coat3 mil · 925 °F interlayer
Vitreous cover coat I3 mil · 1,560 °F fired glass
Vitreous cover coat II · UV stable4 mil · exterior face
Glass-fused-to-steel panels emerging from the enameling oven
Tank Systems · 2026

Six applications.
One fused envelope.

The same glass-fused panel that holds finished drinking water for NSF 61 service holds mesophilic sludge in a biogas digester and leachate in a closed RCRA cell. What changes is the gasket, the nozzle pattern, and the specification binder — not the coating, and not the warranty.

AquaCore Potable Reserve
01 / 06Potable Water Storage

AquaCore Potable Reserve

Model AC-PW · Since 1997

NSF 61 glass-fused-to-steel reservoir for finished drinking water.

Capacity
1.25 MG · 0.75 – 5.0 MG bays
Service life
65+ years · coating warranted
Certifications
NSF / ANSI 61 · AWWA D103-19 · EN 1090-1 EXC3 · FM Global
Factory lead time
10 wks
Full data sheet →
Clarifera Wastewater Basin
02 / 06Wastewater Treatment

Clarifera Wastewater Basin

Model CF-WW · Since 1997

H₂S- and sulfide-resistant equalization and SBR basins for municipal WWTP.

Capacity
0.3 – 6.0 MG working volume
Service life
55+ years · coating warranted
Certifications
AWWA D103-19 · NSF / ANSI 61 optional · ACI 350 compatible · FM Global
Factory lead time
12 wks
Full data sheet →
LixiVault Leachate Containment
03 / 06Landfill Leachate

LixiVault Leachate Containment

Model LV-LH · Since 2001

RCRA-grade GFS vault for the most aggressive liquor on the landfill.

Capacity
100,000 – 1.5 MG
Service life
45+ years · coating warranted
Certifications
40 CFR 264 Subpart J · AWWA D103-19 · RCRA Subtitle D · NFPA 30 secondary
Factory lead time
11 wks
Full data sheet →
FirePermaFuse Reserve
04 / 06Fire Protection

FirePermaFuse Reserve

Model FP-R · Since 1999

FM-approved glass-fused-to-steel tank for NFPA 22 static reserve.

Capacity
NFPA 22 · static fire reserve
Service life
60+ years · coating warranted
Certifications
FM Global 4020 / 4021 · UL 142 (fresh water) · NFPA 22 · AWWA D103-19
Factory lead time
8 wks
Full data sheet →
Digestax Anaerobic Digester
05 / 06Biogas / Digester

Digestax Anaerobic Digester

Model DX-AD · Since 2003

Mesophilic and thermophilic digesters with methane-tight GFS roofs.

Capacity
Mesophilic 95 °F · thermophilic 131 °F
Service life
40+ years · coating warranted
Certifications
EN 1090-1 EXC3 · AWWA D103-19 · CE PED 2014/68/EU · ATEX Zone 2 gas
Factory lead time
16 wks
Full data sheet →
Industraflex Bulk Liquid
06 / 06Industrial Liquid Storage

Industraflex Bulk Liquid

Model IX-BL · Since 2006

Process, brine, and aggressive-liquor storage where epoxy tanks give up.

Capacity
Custom chemistry · CIP-ready
Service life
50+ years · coating warranted
Certifications
3-A Sanitary optional · API 650 annex-J compat. · AWWA D103-19 · NACE SP0178
Factory lead time
9 wks
Full data sheet →
Why We Win The Bid

Epoxy dries.
Glass fuses.

The industry still writes specifications around the coating systems of 1975: powder-coat epoxy, liquid two-part epoxy, and rebar-in-concrete. Every one of them is a film on a substrate — a bond that fails long before the steel underneath does.

Powder-coat epoxy
6 – 12
$8 – 14 / ft² · 8 yrs
Chalking, UV degradation, electrostatic holidays, field touch-up required year three onward.
Fails in H₂S, marginal in potable chloramine.
Liquid epoxy · two-part
4 – 10
$12 – 22 / ft² · 6 yrs
Cathodic disbondment, cold-wall blistering, applicator dependent, VOC exposure at cure.
Fails in leachate, digester, industrial brine.
Concrete · reinforced
20 – 40
Patch · $18 – 30 / ft² · 12 yrs
Cracking under seismic event, rebar corrosion, 8 – 14 month erection, site-cure dependent.
Sulfate attack, no H₂S headspace resistance.
PermaFusion GFS
40 – 65
Never · coating warranted
None to date across 4,200+ tanks. Coating is the steel; no applicator variability; no recoat.
Inert pH 3 – 12, H₂S to 4,500 ppm, CIP to 180 °F.
Green and blue glass-fused-to-steel panels on factory saddles
Finished GFS panels · pre-crate QAZero holiday
Dark GFS leachate tank in desert landfill service
LV-LH · 18-year RCRA leachate serviceOriginal coating
Lifetime Cost of Ownership

The cheapest tank
is the one you never recoat.

Fifty-year total cost of ownership on a 1 MG tank — installation, recoat schedule, downtime, and end-of-life. PermaFusion is the second lowest capex. It is the lowest lifetime cost by a factor of two.

Phase
PermaFusion GFS
Liquid epoxy
Concrete
Year 0 · Installation
$1.00 M
$0.88 M
$1.42 M
Year 8 · First recoat
$0
$0.21 M
$0.09 M
Year 16 · Second recoat
$0
$0.24 M
$0.12 M
Year 24 · Third recoat
$0
$0.28 M
$0.18 M
Year 32 · Fourth recoat
$0
$0.33 M
$0.22 M
Year 40 · Fifth recoat
$0
$0.38 M
Demolition
Year 50 · Decommission
Scrap credit · ($0.08 M)
Demolition + ($0.14 M)
Demolition + ($0.36 M)
50-yr total investmentLowest · GFS
$0.92 M
$2.46 M
$2.39 M

Model: 1.0 MG potable · Midwestern labor · 2026 USD · 3.5 % escalation.

50-year delta
−47%

Life-cycle savings vs. liquid-epoxy-coated welded steel. Before factoring downtime or outage penalties.

Warranty · coating
25-year pro-rata on the fused enamel itself — not just the shell. No competitor publishes this.
Erect schedule
28 days typical · vs. 120 days welded steel · vs. 240 days concrete.
Delivery & Commissioning

Four stages
from scope to signature.

01

Project scoping

Hydraulic sizing, site survey, soils, seismic and wind envelope. Output: a stamped basis-of-design memo in seven business days.

02

Panel firing · Canton

Steel cut, blasted, phosphated, and enameled in our Champions Gateway furnace line in Canton, Ohio. Every panel serialized to the mill cert.

03

Bolted erection

Factory-trained crew jack-raises the tank from the roof down. No welding, no painting, no grinding on-site.

04

Commission & warrant

Hydrotest, factory witness, 25-year coating warranty, and a service binder that lives on the operator shelf.

Specification

Send us the site.
We’ll send back a fused envelope.

Share your hydraulic demand, footprint, chemistry, and seismic site class. Our estimating team returns stamped drawings, a lifetime-cost model, and a fixed-price bid within seven business days — or tells you, honestly, that welded steel or concrete is the right envelope for your duty. We quote the truth, not the sale.

Download the documents

Hand these to your engineer, specifier, or procurement team. The full technical brochure and the master specification — the same packet we submit with every bid — are yours without a form wall.

Parent company
Municipal Tank Works, LLC
2014 Champions Gateway · Canton, OH 44708
Global reach
Tanks shipping to 41 countries · 4,200+ in service
Field service
24 hr callout · continental US + crated export
© 1997 — 2026 Municipal Tank Works, LLC · PermaFusion® is a registered mark of MTW
ISO 9001:2015AWWA D103-19NSF 61FM Global 4020Canton, OH · (330) 970-6030