Closed-Deck Strength. No Machining.

Closed-Deck Strength.
No Machining.

Two-part block filler epoxy that reinforces open-deck aluminum engine blocks. Pour it in your garage and run more boost without cracking cylinder walls.
  • 21,000 PSI Compressive Strength
  • 1:1 Thermal Expansion with Aluminum
  • Partial Fill Keeps Stock Cooling
  • DIY Install in 5 Steps, No Machining
Shop EPOXY54 - From $124.99Watch the 5-Step Install
Ships Next Business DayOn EPOXY54 products
Worldwide ShippingNorth America, Europe, Middle East, Asia
No Machine Shop NeededDIY install at home
Live Tech SupportEmail & phone, Mon-Fri

Performance Parts by Engine Platform

All engine platforms →
BMW N202.0L turbo 4-cylBMW N523.0L inline-6BMW N543.0L twin-turbo I6BMW N553.0L turbo I6BMW N624.4L / 4.8L V8Mini N181.6L turbo 4-cyl
Honda B161.6L VTECHonda B181.8L VTECHonda B202.0L 4-cylHonda D161.6L SOHCHonda K202.0L i-VTECHonda K242.4L i-VTEC
Subaru EJ202.0L boxerSubaru EJ222.2L boxerSubaru EJ252.5L boxerSubaru FA202.0L boxerSubaru FA242.4L boxer
Nissan VQ353.5L V6Nissan VQ373.7L V6Nissan VR303.0L twin-turbo V6Nissan VR383.8L twin-turbo V6
Volvo T52.3L turbo 5-cylVolvo T62.8L twin-turbo I6

Simple Installation Process

No machining required. No special tools needed. Just follow our proven 5-step process and you'll have a reinforced block in 24 hours.
Watch Full Installation Guide Download Detailed Instructions (PDF)
01

Prepare the Block

Fill the water jacket with a temporary solute like sugar or salt. This creates the void space for coolant passages.

02

Mix & Pour Epoxy

Mix EPOXY54 and pour it to fill the top ¾ inch of the block. The runny consistency ensures a clean, seamless application.

03

Cure for 24 Hours

Allow the epoxy to cure completely. Unlike other closed deck solutions, EPOXY54 is ready in just 24 hours without the need for machining.

04

Drill Coolant Passages

Following your head gasket design, drill the necessary coolant passages through the cured epoxy.

05

Dissolve & Flush

Dissolve the temporary solute with water and flush it out, leaving behind a perfectly reinforced block with optimal cooling.

In the Blocks of Record-Setting Engines

Real customers, real numbers. More builds on Instagram @epoxy_54
1000+
Happy Customers
50+
Countries
0
Reported Failures
100+
Engine Platforms
DynoDyno sheetDyno sheet
904 WHP

Fastest H22 EK in Canada

668 lb-ft · Dynojet at Flotec Fuel Injection

1/4 MileTimeslipTimeslip
7.98 @ 171.84 MPH

Fastest 1/4 Mile N54

1.239 60-ft · Las Vegas Motor Speedway

DriftThe setupThe setup
No Overheating

BMW 1 Series Drift Build

Back-to-back drift runs on an EPOXY54 block

See More Builds on Instagram

Closed-Deck Support

Supports the cylinder walls under boost like a closed deck, at a fraction of the cost.

Thermal Matched

Engineered thermal expansion rate matches aluminum perfectly—no cracking or separation.

DIY Friendly

No machining required. Install before or after machine work without affecting dimensions.

Cost Effective

Achieve closed deck performance for significantly less than traditional alternatives.

Debunking the Myths

Let's address the common misconceptions about epoxy block reinforcement with facts.

Myth: Epoxy will overheat your engine

Truth

EPOXY54 maintains stock cooling efficiency. The coolant passages you drill preserve full OEM cooling properties.

Myth: Epoxy is weak and will crack

Truth

EPOXY54's thermal expansion is matched 1:1 to aluminum, so it moves with the block through every heat cycle instead of cracking.

Myth: Coolant will deteriorate epoxy

Truth

Chemical-resistant formula specifically designed to withstand coolant exposure indefinitely.

Myth: The epoxy will melt from engine heat

Truth

EPOXY54 is a high-heat epoxy that withstands normal engine temperatures. Users have reported warped cylinder heads from water pump failures without any epoxy damage. In short, if your engine is getting hot enough to damage the epoxy, you have bigger problems on your hands.

How EPOXY54 Compares

Feature
EPOXY54
Block Guard (CSS)
Cement
Cost
Starting at $124.99
$2,000+
$150
Machining Required
No
Extensive
No
OEM Cooling
Yes
Yes
No
Thermal Expansion
1:1 with Aluminum
1:1 with Aluminum
Expands/Shrinks
Daily Driveable
Yes
Yes
Limited
EPOXY54 aluminum block epoxy kit cans

Ready to Reinforce Your Block?

Join thousands of satisfied builders who have reinforced their blocks with EPOXY54. Get the strength of a closed deck at a fraction of the cost.

Starting at $124.99

Pick your engine and fill type on the next page and we'll match the right kit size.

Find My Kit

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Performance Guarantee

30-day money back if not satisfied

Fast Delivery

Ships next business day

Proven Results

Trusted in 50+ countries worldwide

Expert Support

Technical assistance included

Get In Touch

Have questions? We're here to help with your build

Emailsupport@epoxy54.comResponse within 24 hours Phone(604) 809-7398Mon-Fri, 9AM-6PM PST

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