Bio-Gard E251 Heavy Duty Epoxy Coating | Dry or Damp Surfaces | VOC Free | 100% Solids | Air Shippable

TESTING RESULTS

Recommend Application Thickness is 6 mils on flat surface.

Coverage is 160 sq ft/ gallon @ 10 mils

CURE SCHEDULE

APPLICATION TEMPERATURE: 45- 110 degrees F

Product Use Instructions 

Surface Preparation

Bare Concrete: Surfaces should be allowed to cure for am 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.

Coated Concrete: Worn but sound coatings may be coated after a thorough and vigorous cleaning. Bio-Gard E251 will not soften existing coatings since it contains no solvents. Ultimate adhesion of the coating system will be determined by strength and adhesion of existing coating. If the integrity of the existing coating is questionable, remove by abrasive blasting or other mechanical means.

Metallic Substrate: Proper surface preparation plays a key part in obtaining optimum performance. The best preparation method is by abrasive blasting using clean, dry compressed air to achieve a SSPC-SP10 ” White Metal Blast” with a 2.5 mil anchor profile. When not possible to abrasive blast, provide alternative surface profile by abrasive discing, needle gunning, or high pressure water blast over 8,000 psi.

Mixing Procedures

This material is a two-component product, premeasured to produce the desired kit size once part A and B are mixed. For small small 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 1 minute, taking care to reach all corners and walls to eliminate unmixed material. Unmixed material will never harden. Material may immediately be used.

Application 

Application on flooring is assisted by use of a squeegee to distribute material over application area then back rolling with a 3/8″ nap roller.

For larger areas, application by heated plural spray should use the following equipment setup:

Mix ratio: 2/1 by volume

Fluid Pressure: 2,500 psi

Fluid Temp: 120-140F

Tip Size: .027″

Stripe coating is recommended for all sharp edges. Apply after surface preparation and allow to cure until firm enough to overcoat without displacing initial stripe coat material.

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 makes Bio-Gard E251 different from traditional industrial epoxy coatings?

Bio-Gard E251 combines industrial-grade moisture, chemical, and abrasion resistance with a smoother, more attractive finish than many heavy-duty maintenance coatings. Its self-leveling characteristics and easier roller application make it suitable for visible commercial, industrial, and high-end residential applications alike.

Can Bio-Gard E251 be applied to damp or wet surfaces?

Yes. Bio-Gard E251 is formulated to tolerate properly prepared dry, damp, or wet surfaces, making it useful for splash zone, wastewater, humidity-prone, and difficult maintenance environments where conventional coatings may struggle.

Is Bio-Gard E251 suitable for garages and visible concrete areas?

Yes. Unlike many heavier industrial epoxy linings, Bio-Gard E251 provides a smoother, glossier finish that works well in high-end garages, utility rooms, workshops, service corridors, and other visible concrete coating applications.

Can Bio-Gard E251 be used with non-slip aggregate systems?

Yes. Bio-Gard E251 works well with entrained or broadcast aggregate systems for non-slip floors, stairways, ramps, and splash zone areas. For additional traction options, see our anti-slip additives.

What surfaces can Bio-Gard E251 be applied to?

Bio-Gard E251 is commonly used on:

• Concrete
• Steel
• Stair systems
• Secondary containment areas
• Wastewater structures
• Mechanical rooms
• Waterfront and splash zone structures
• Utility and maintenance environments

Proper surface preparation is always recommended for best long-term performance.

Is Bio-Gard E251 VOC free?

Bio-Gard E251 is a 100% solids epoxy coating formulated with essentially zero VOCs and very low odor during application. This makes it useful for enclosed or occupied maintenance areas where minimizing odor is important.

What is the difference between Bio-Gard E251 and Bio-Gard E255?

Bio-Gard E251 is generally selected when contractors want a balance of smooth appearance, easier application, and long-term protection.
Bio-Gard E255 is typically used in more aggressive severe-service chemical immersion and highly corrosive industrial environments requiring maximum chemical resistance.

What products are commonly used alongside Bio-Gard E251?

Bio-Gard E251 is often paired with:

• Concrete repair materials for rebuilding damaged surfaces
• Non-slip aggregate systems for stairs and walkways
• Moisture-tolerant repair epoxies
• Secondary containment coating systems
• Waterproofing and splash-zone maintenance coatings

For heavily deteriorated concrete repairs, many contractors also use Bio-Fill repair systems prior to applying the final Bio-Gard E251 protective coating.

Can Bio-Gard E251 be used in wastewater and municipal environments?

Yes. Bio-Gard E251 is commonly used in wastewater facilities, municipal maintenance projects, and containment systems where concrete or steel requires protection from moisture, abrasion, and chemical exposure.

Does Bio-Gard E251 require special spray equipment?

No. Bio-Gard E251 can be applied by brush or roller for many projects, though heated plural-component spray equipment may be used on larger commercial or industrial applications.