LABPOX 35 100% Solids Epoxy | Pinhole Mitigation for Porous Concrete
LABPOX 35 is a high opacity, professional grade, 100% solids specialty epoxy engineered specifically for porous concrete and oil contaminated surfaces. This VOC free system features advanced pinhole mitigation technology, making it the ideal choice for slabs prone to outgassing in industrial, commercial, and residential environments.
The Professional Advantage: LABPOX 35 delivers superior mechanical properties and best in class resistance to oil and contaminants. Its high density formula prevents dirt penetration and reduces maintenance, while the pinhole mitigation technology ensures a superior finish on difficult substrates.
Technical Performance Snapshot
| Property |
ASTM Standard / Value |
| Mix Ratio |
2 Parts A to 1 Part B |
| Compressive Strength |
12,725 psi (ASTM D695) |
| Shore D Hardness |
84 Shore D (ASTM D2240) |
| Abrasion Resistance |
50 mg loss (ASTM D4060) |
| Pull Off Test |
>3 Mpa (ASTM D7234) |
| VOC Content |
0 g per L (100 percent Solids) |
| Pot Life |
30 minutes at 72 Degrees |
| Working Time |
45 minutes at 72 Degrees |
Where LABPOX 35 Fits in a Flooring System
1. As a Specialty Primer for Problem Slabs
LABPOX 35 is self priming and designed for oil contaminated surfaces and porous concrete. It penetrates the substrate to provide a superior mechanical bond where standard epoxies might experience adhesion failure.
2. As a High Opacity Base Coat
The superior opacity of LABPOX 35 is equivalent to a 3 coat system, providing excellent hide and a uniform foundation for solid color or decorative broadcast systems.
3. As a Flake or Quartz Receiver Coat
Specifically suited for broadcast systems, this product reduces the occurrence of pinholes and provides the density required to prevent contaminant migration beneath the coating.
Approximate Coverage Rates
| Desired Thickness (Mils) |
Square Feet Per Gallon (SFPG) |
| 8 Mils |
200 SFPG |
| 10 Mils |
160 SFPG |
| 12 Mils |
133 SFPG |
| 16 Mils |
100 SFPG |
| 20 Mils |
80 SFPG |
Cure Schedule (At 72°F / 50% Relative Humidity)
| Cure Stage |
Time Frame |
| Working Time |
45 Minutes |
| Tack Free |
5 Hours |
| Recoat Window |
5 to 24 Hours |
| Dry Through / Sandable |
9 to 10 Hours |
| Foot Traffic |
24 Hours |
| Full Chemical Cure |
7 Days |
System Limitations
Moisture content must be below 4 percent unless a moisture mitigation system is installed. Failure to meet this requirement can result in adhesion loss or coating failure. The product is not immune to plasticizer transfer from rubber tires; tires should cool down before parking on the coated surface.
Recommended System Setup
For a guaranteed bond and long term finish, follow this professional stack:
-
Primer: LAB Surface Epoxy Primer (recommended for high traffic) or LABPOX 35 (self priming).
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Base/Body: Apply LABPOX 35 (Colored).
-
Topcoat: Seal with LABFAST, LABSHIELD ECO, or AQUALAB PUR for additional UV and chemical protection.
Mixing and Application Requirements
Application Equipment
- 1/8 inch notched rubber squeegee
- 3/8 inch nap woven shed resistant roller cover
- 3 inch chip brush
Mixing Instructions
Precision in the mixing process is critical to ensure the chemical bond and structural integrity of the LABPOX 35 system.
-
Pre-Mix Part A: Before final mixing, pre-mix Part A at low speed using a Paddle Mixer and a drill. Mixing should be done until the settlement comes off the bottom of the bucket and the color become uniform.
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Combine Components: Pour 2 containers of Part A (Base) into a large mixing bucket, being careful not to pour material onto the sides of the larger bucket.
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Add Activator: Pour the Part B (Activator) directly into the center of the large bucket. Again, ensure no material gets on the sides of the Base bucket; failing to do so may leave unmixed resin that causes soft spots on your finished floor.
-
Mixing Time: Mix full kits with a Box Mixer for 2 minutes. Use a low-speed drill (300 to 450 RPM) to minimize air entrapment. DO NOT attempt to mix a full kit of this product with a Paddle Mixer. The volume is insufficient for a thick, heavy duty epoxy such as this.
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Scrape Sides: During the mixing process, make sure to scrape the sides and bottom of the mixing container thoroughly so no unmixed material remains.
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Immediate Placement: Once the product is properly mixed, it needs to be immediately poured onto the floor. Leaving mixed material for too long in a mixing pail will create an exothermic reaction (rapid heat buildup), rendering the product unusable.
Application Procedure
Application Procedure Pour mixed material in a 20 foot long 12 inch wide ribbon Do not drain or scrape remaining material from the bucket onto the floor. Spread to uniform thickness with a notched squeegee and roll North South and back roll East West to achieve uniform coverage. Roller should be a 3/8 inch shed resistant epoxy roller cover.
PRO TIP: If pinholes appear during application, allow sufficient time to go back and burst them by rolling back and forth or with another squeegee pass. For extremely porous slabs, sand and plug persistent pinholes with epoxy gel after the first coat has cured.
Frequently Asked Questions
Is LABPOX 35 good for oil contaminated floors?
Yes. It is considered best in class for resistance to oil and other contaminants that typically cause fisheyes or adhesion failure in standard epoxies.
Can this be used as a self priming coat?
Yes. LABPOX 35 is self priming and specifically designed to penetrate porous concrete slabs to reduce outgassing.
Is this product beginner friendly?
While it offers a comfortable 45 minute working time, proper mechanical surface preparation (CSP 2) and moisture testing are strictly required for a professional grade installation.
How do I handle very porous concrete?
On very porous slabs, use a tight squeegee with no back roll for the first coat to properly seal the surface before applying the body coat.
What is the mix ratio for LABPOX 35?
It is a two component system with a precise mix ratio of 2 Parts A to 1 Part B (2A:1B) by volume.
Does this epoxy amber or yellow?
Like most 100 percent solids epoxies, it is not UV stable. For maximum UV protection and to slow yellowing, a topcoat like LABFAST or AQUALAB PUR is strongly recommended.
How soon can I walk on the floor?
The floor can typically accept foot traffic in 24 hours, but full chemical cure takes 7 days. Do not clean the surface with water or chemicals during the first week.
Is this product safe for interior use?
Yes. LABPOX 35 is 100 percent solids and VOC free, making it virtually odor free and suitable for interior manufacturing, commercial, or residential projects.
Mixing & Application Requirements
Substrate Preparation
Concrete must be mechanically prepared to a minimum CSP-2 profile. Surfaces must be clean, dry (below 4% moisture), and cured for at least 28 days.
Mixing Instructions
1. Pre-Mix Part A: Mix for 1 minute to suspend all pigments.
2. Ratio: Combine 2 parts A with 1 part B.
3. Blend: Mix for 3 minutes at 300-450 RPM using a box mixer. Scrape sides and bottom thoroughly.
Application Procedure
Pour in ribbons immediately—do not leave in bucket. Spread using a 3/16" notched squeegee. Back-roll with an 18" x 3/8" nap roller to ensure deep penetration and to seal the slab against outgassing.
Recoat Window
Apply second coat within 24 hours. After 24 hours, a mechanical sand (dull finish) is required to ensure a proper bond.
⚠️ GET IT OUT OF THE BUCKET: Material will exotherm and cure rapidly if left in the container.
How Much Do I Need?
Labpox 35 - 3 Gallon Kit
| Project Size |
Kits Required |
| Up to 300 ft² |
1 Kit |
| 301 - 600 ft² |
2 Kits |
| 601 - 900 ft² |
3 Kits |
| 901 - 1200 ft² |
4 Kits |
| 1201 - 1500 ft² |
5 Kits |
Coverage Rate: Approx. 100 sq. ft. per gallon (300 sq. ft. per kit).
