Build Stronger.

Build Stronger.

Race Protected.

Drive Daily.

The closed deck system trusted by the world's fastest engines.
  • 21,000 PSI Compressive Strength
  • Full OEM Cooling Retained
  • 1:1 Thermal Expansion to Aluminum
  • No Machining Required (DIY Install)
Shop EPOXY54 Watch Installation Video
Trusted across platforms: VQ, BMW, Subaru, Volvo, Honda, Chevrolet
VQBMWSubaruVolvoHondaChevroletFord Top Fuel Applications

1000+ Builds

Trusted globally

Proven up to 1800+ WHP

Tested performance

0 Reported Failures

Field tested

Why Engine Builders Choose EPOXY54

  • Same strength as $2,000+ closed deck solutions
  • DIY install - no machine shop required
  • Ready to run in just 24 hours
  • Maintains factory cooling efficiency

Why EPOXY54 is Your Best Choice

Click any section below to learn more

1

What is EPOXY54?

Discover how this revolutionary epoxy can strengthen your block without compromising performance.

Learn More →
2

The Truth About Epoxy

See the proof: 21,000 PSI strength, full OEM cooling retained, and chemical resistance that lasts.

Learn More →
3

Real Results

Read testimonials from builders running 600-1700+ WHP with EPOXY54 in their blocks.

Learn More →

The Smart Alternative to Closed Deck

EPOXY54 is a custom-engineered, high-temperature epoxy specifically designed to reinforce engine blocks. It provides the strength of a closed deck system while maintaining OEM cooling efficiency—all at a fraction of the cost.

Traditional closed deck solutions require extensive machining, high costs, and often warp cylinders during install. EPOXY54 gives you the strength you need without the compromises.

Trusted by the fastest engines in the ¼ mile, EPOXY54 has proven itself in race and street applications.

Cure Time: 24 Hours Strength: 21,000 PSI Compatibility: All Open Deck Engine Blocks

21,000 PSI Strength

Compressive strength that rivals closed deck solutions 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

21,000 PSI compressive strength with thermal expansion matched to aluminum prevents cracking under extreme conditions.

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
Closed Deck
Cement
Cost
Starting at $124.99
$2,000+
$150
Strength (PSI)
21,000
25,000
8,000
OEM Cooling
Yes
Yes
No
Machining Required
No
Extensive
No
Cure Time
24 hrs
N/A
N/A
Chemical Resistant
Yes
Yes
No
Daily Driveable
Yes
Yes
Limited
Thermal Expansion
1:1 with Aluminum
1:1 with Aluminum
Expands/Shrinks
0+

Happy Customers

0+

Happy Customers

0+

Happy Customers

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Happy Customers

"I was skeptical about using epoxy, but after years of daily driving and track abuse, my block is still perfect. No cracks, no overheating. Best money I ever spent on my build."

Mike Chen
VQ35DE Build

"I was skeptical about using epoxy, but after years of daily driving and track abuse, my block is still perfect. No cracks, no overheating. Best money I ever spent on my build."

Mike Chen
VQ35DE Build

"I was skeptical about using epoxy, but after years of daily driving and track abuse, my block is still perfect. No cracks, no overheating. Best money I ever spent on my build."

Mike Chen
VQ35DE Build

"I was skeptical about using epoxy, but after years of daily driving and track abuse, my block is still perfect. No cracks, no overheating. Best money I ever spent on my build."

Mike Chen
VQ35DE Build

"I was skeptical about using epoxy, but after years of daily driving and track abuse, my block is still perfect. No cracks, no overheating. Best money I ever spent on my build."

Mike Chen
VQ35DE Build

"I was skeptical about using epoxy, but after years of daily driving and track abuse, my block is still perfect. No cracks, no overheating. Best money I ever spent on my build."

Mike Chen
VQ35DE Build

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 the 2-part high-temperature epoxy and pour it to fill ¾ 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

Prepare the Block

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

05

Prepare the Block

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

Ready to Reinforce Your Block?

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 $159.99

Flexible sizing options for your build

Performance Guarantee

30-day money back if not satisfied

Fast Delivery

Ships within 48 hours

Proven Results

Trusted in 50+ countries worldwide

Expert Support

Technical assistance included

Frequently asked questions

What is the return policy?

Our goal is for every customer to be totally satisfied with their purchase. If this isn't the case, let us know and we'll do our best to work with you to make it right.
Are any purchases final sale?

We are unable to accept returns on certain items. These will be carefully marked before purchase.
When will I get my order?

We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
Where are your products manufactured?

Our products are manufactured both locally and globally. We carefully select our manufacturing partners to ensure our products are high quality and a fair value.
How much does shipping cost?

Shipping is calculated based on your location and the items in your order. You will always know the shipping price before you purchase.