Bio-Fill E457 Epoxy Repair | Void Filler to 1″ | Chemical Resistant | Horizontal ,Vertical and Overhead Application | Can Apply Underwater

Bio-Fill E457 is a high-build epoxy void filler and concrete repair compound designed for restoring damaged, uneven, or deteriorated concrete surfaces. The advanced epoxy formula produces a strong yet lightweight repair material with excellent chemical resistance and physical durability for demanding industrial, marine, commercial, and residential environments.

The non-sag, putty-like consistency allows Bio-Fill E457 to be applied in horizontal, vertical, and overhead applications without slumping, making it ideal for repairing voids, spalls, cracks, and surface imperfections. The product features a simple 1:1 mix ratio and is commonly used for concrete resurfacing and rebuilding prior to applying protective epoxy coating systems.

Bio-Fill E457 can be applied to damp or wet surfaces and may be submerged underwater after application while curing. This makes the system well suited for marine structures, wastewater environments, docks, sumps, secondary containment, pool areas, and other moisture-prone service conditions.

Recommend Application Thickness is 1″ (1,000 mils)  but can range due to specific project. Text Chat or Call us for questions about your project 630-675-4509.

CURE SCHEDULE

APPLICATION TEMPERATURE: 45- 110 degrees F

Product Use Instructions 

Surface Preparation

Concrete: Surfaces should be allowed to cure for a minimum of 20 days before coating. Excessive weak surface laitance must be removed by either acid etching or abrasive sweeping before coating. Aged, uncoated concrete surfaces are best prepared by abrasive sweeping. Contamination by oil or grease should be removed with an industrial degreaser before abrasive blasting or acid etching.

Wet Surfaces: Remove marine biological settlement and corrosion by high pressure water jetting with or without abrasive. Conventional air/ abrasive blasting works well at shallow depths however efficiency falls off sharply below 10 feet.

Once applied to wet surface, product can be submerged and cured under water. NOTE-  product cannot sustain wave movement until fully cured!

Mixing Procedures.

Bio-Fill E457 is a two-component, 1:1  mix by volume, solvent free product. For small kits, manual mixing by hand using a wooden or plastic stir stick can be easy accomplished. For larger kits, a Jiffy Type mixer with a high torque motor is recommended for proper blending. Pour the curing agent into the base and mix for about 2 minutes, taking care to reach all corners and walls to eliminate unmixed material. Unmixed material will be easily recognized by streaks of black or white compared to the mixed grey color. Material does not require an induction time and can be immediately used after mixing.

** Unmixed material will never harden **

Application

Horizontal Areas: Apply the mixed components into the prepared area by trowel, taking care to ensure that the Bio-Fill E457 will intimately contacts to the surface. Ensure good adhesion by firmly pressing the initial layer into the substrate. It will be helpful to paddle the mixture around the void space if there is a possibility that trapped air or water is present.

Vertical Areas: Bio-Fill E457 may be applied up to 1″ thickness on properly prepared vertical surfaces. Apply the mixed material using a straight edged spreader or similar tool and press into the void to be coated in order to “wet’ the interior surface. Excess product is easily removed and returned back to the pot as waste or spread out in a thin layer using the straight edge spreader. To improve adhesion, consider using a concrete primer such as Bio-Seal E197 which will provide a tacky surface and chemical bond into the concrete.

**Temperature plays a significant role in the cure rate and build thickness achievable. Higher temperatures will decrease the working time and cure times but will also cause the material to sag at high build thickness. If applying in warm conditions, reduce overall build thickness per layer. Allow to cure until tacky before applying the next layer.

Once applied to wet surface, product can be submerged and cured under water. NOTE-  product cannot sustain wave movement until fully cured!

Safety: This is a hazardous material if misused. Read and understand the Safety Data Sheets (SDS’s) before use

Warranty Disclaimer: The technical data given herein has been compiled for your help and guidance. It is based upon our experience and knowledge however, as we have no control over the use to which this information is put, no warranty, express or implied, is intended or given. We assume no responsibility whatsoever for coverage, performance, or damages, including injuries resulting from use of this information or products recommended herein.

What is Bio-Fill E457?

Bio-Fill E457 is a high-performance, 100% solids epoxy void filler designed to fill large cavities, gaps, and structural voids in concrete, masonry, and industrial substrates. It is engineered for deep-fill applications where strength, adhesion, and durability are critical.

What is Bio-Fill E457 used for?

Bio-Fill E457 is commonly used for:

• Filling large voids in concrete slabs and walls
• Repairing spalled or damaged concrete
• Structural patching in industrial environments
• Filling annular spaces around pipes and penetrations
• Rebuilding missing sections of concrete or masonry

What makes Bio-Fill E457 different from standard epoxy fillers?

Unlike traditional patching compounds, Bio-Fill E457:

• Can be applied in deep lifts without sagging
• Has high compressive strength for structural repairs
• Is 100% solids (no shrinkage)
• Bonds aggressively to damp or dry substrates
• Is designed specifically for large-volume fills, not just surface repairs

Can Bio-Fill E457 be used in deep voids?

Yes. Bio-Fill E457 is specifically formulated for deep void filling. It can be applied in thicker sections than standard epoxies, making it ideal for large cavities or structural gaps.

How strong is Bio-Fill E457?

Bio-Fill E457 develops high compressive strength, making it suitable for structural repairs and load-bearing applications in industrial and commercial environments.

Can it be used on vertical surfaces?

Yes. Bio-Fill E457 has a non-sag formulation, allowing it to stay in place on vertical and overhead applications without slumping.

Will Bio-Fill E457 bond to damp surfaces?

Yes. It is designed to bond to both dry and damp substrates, making it ideal for challenging jobsite conditions where moisture may be present.

What surfaces can Bio-Fill E457 be applied to?

It adheres well to:

• Concrete
• Masonry
• Brick
• Stone
• Properly prepared metal surfaces

How do you prepare the surface before applying Bio-Fill E457?

For best results:

• Remove loose debris, dust, and contaminants
• Mechanically profile smooth surfaces if needed
• Ensure the substrate is structurally sound
• Remove standing water (damp is acceptable, but not wet)

How is Bio-Fill E457 applied?

Bio-Fill E457 is typically:

• Mixed according to manufacturer ratios
• Poured, troweled, or injected into the void
• Built up in layers if needed for extremely large fills

How long does Bio-Fill E457 take to cure?

Cure time depends on temperature and mass, but typically:

• Full cure: 24 hours or more

Warmer temperatures accelerate curing, while cooler conditions slow it down.

Can Bio-Fill E457 be sanded or coated after curing?

Yes. Once cured, it can be:

• Sanded or ground smooth
• Coated with epoxies, urethanes, or other protective systems
• Painted if desired

Is Bio-Fill E457 suitable for industrial environments?

Absolutely. It is designed for:

• Warehouses
• Manufacturing facilities
• Wastewater plants
• Infrastructure repair
• Heavy-duty commercial applications

Can Bio-Fill E457 be used below grade or underwater?

It can be used below grade, but for active water or underwater applications, a specialized underwater epoxy may be more appropriate. Always verify based on project conditions.

What are the advantages of using Bio-Fill E457?

• Excellent for large void filling
• Zero shrinkage for reliable repairs
• Strong structural performance
• Works on vertical and overhead surfaces
• Bonds to damp substrates
• Reduces need for multiple repair products

When should I choose Bio-Fill E457 over other repair products?

Choose Bio-Fill E457 when:

• You have large or deep voids
• Structural strength is required
• Standard patching materials are not sufficient
• You need a non-sag, high-build epoxy solution
• Product to go vertical, horizontal and overhead