VFI-4385 82 D Form Coating Epoxy

VFI-4385 82 D Form Coating Epoxy is a coating with high rigidity and enough flexibility for casting concrete or other cementitious products over EPS, wood, and steel surfaces. An epoxy coating is an alternative to the VFI-2100 urethane molding rubber series or urethane form coatings like VFI-2538 70 D EPS Form Hard Coat. A low viscosity allows for easy mixing and application in 20 mil passes using a roller or brush. The coating will self-level, providing a uniform casting surface that can also be sanded to a desired finish.

Physical Properties	Test Method	Test Results
Shore Hardness	ASTM D2240	82 ± 2
Tensile Strength	ASTM D412	6,200 psi
Tensile Modulus	ASTM D412	N/A
Elongation at Break	ASTM D412	12%
Flexural Strength	ASTM D790	N/A
Flexural Modulus	ASTM D790	N/A
Weathering	N/A	Not UV Stable
Adhesion (prepared plywood/existing coating)	ASTM D4541	N/A
Standard Color	N/A	Blue

Physical Properties

Test Method

Test Results

Shore Hardness

ASTM D2240

82 ± 2

Tensile Strength

ASTM D412

6,200 psi

Tensile Modulus

ASTM D412

N/A

Elongation at Break

ASTM D412

12%

Flexural Strength

ASTM D790

N/A

Flexural Modulus

ASTM D790

N/A

Weathering

N/A

Not UV Stable

Adhesion (prepared plywood/existing coating)

ASTM D4541

N/A

Standard Color

N/A

Blue

Liquid Properties	Test Method	Test Results
Solids by Volume	ASTM D2697	100%
Mix Ratio by Volume	N/A	1A:1B
Mix Ratio by Weight	N/A	100A:44B
Weight per Gallon A Side	ASTM D1475	9.36 lb/gal
Weight per Gallon B Side	ASTM D1475	8.25 lb/gal
Viscosity A Side	ASTM D2196	1,300 cps
Viscosity B Side	ASTM D2196	380 cps
Gel Time	N/A	32 minutes
Tack-Free Time	N/A	N/A
Cure to Handle	N/A	16 hours
Recoat Window	N/A	24 hours
Full Cure Time	N/A	4-5 days
Volatile Organic Compounds	N/A	0

Liquid Properties

Test Method

Test Results

Solids by Volume

ASTM D2697

100%

Mix Ratio by Volume

N/A

1A:1B

Mix Ratio by Weight

N/A

100A:44B

Weight per Gallon A Side

ASTM D1475

9.36 lb/gal

Weight per Gallon B Side

ASTM D1475

8.25 lb/gal

Viscosity A Side

ASTM D2196

1,300 cps

Viscosity B Side

ASTM D2196

380 cps

Gel Time

N/A

32 minutes

Tack-Free Time

N/A

Cure to Handle

N/A

16 hours

Recoat Window

N/A

24 hours

Full Cure Time

N/A

4-5 days

Volatile Organic Compounds

N/A

Thickness Requirements

The coating can be applied in a minimum of 20 mil passes with a maximum thickness of about a quarter inch.

Storage/Shelf Life

The product has a shelf life of 6 months from the date of manufacture. It should be stored in a dry, temperature-controlled space between 60°F – 90°F.

Surface Preparation

For ensured adhesion, all surfaces must be clean and free of contaminants, including dirt, dust, and debris. Oil and grease must be removed by scrubbing with a cleaning detergent and rinsing with water.

EPS – Ensure that EPS foam has been aged for at least 30 days. Foam between 1 and 3 PCF is acceptable, but for optimal cost-to-quality ratio, we recommend 2 PCF foam. Once clean and dry, VFI-4385 can be applied directly to the surface.
Wood – The surface should be clean, relatively dry, and sanded for good mechanical adhesion.
Steel – The surface must be cleaned by roughly sanding or sandblasting to SP6 to remove all rust, mill scale, dirt, and other contaminants.

Mixing

CAUTION: Depending on the overall volume being mixed and the ambient temperature, excessive heat may build up. Due to the exothermic reaction generated, only mix what you are ready to apply. The more you mix, the hotter the material will be, and it may cause fumes and smoke.

Before combining the A and B sides, premix the Hardener (B side) until a uniform mix is achieved. The Epoxy (A side) does not need to be premixed.

Pour the measured B side into the measured A side and mix them until uniform. Transfer the mixture to a new container and mix again before use.

Application Guidelines

VFI-4385 can be applied by brush or roller at a minimum of 20 mil passes with a maximum thickness of about a quarter inch. Pour the material onto the surface immediately after mixing. Leaving it in the mixing container can cause it to over-generate heat, which causes the material to thicken faster and cure faster. For additional recoats, a good surface profile is required, so the cured coating must be sanded between each application. Always ensure the surface is clean, free of concrete dust, and dry before coating.

Precautions

The material is toxic when inhaled, swallowed, or in contact with skin. If you are experiencing any symptoms, call a poison center or doctor immediately. Wear all necessary PPE to avoid prolonged exposure, including adequate full-face respiratory equipment. Avoid breathing in vapors or repeated skin contact. Do not add foreign material to the product. See Safety Data Sheet for complete safety data.