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EPONAL 383

Smoothing epoxy coating for reshaping concrete surfaces

Definitions
PrimerLiquid or paste applied onto a substrate to obtain optimum bonding. It helps regulate the porosity of the substrate (reduce absorption, therefore adhesive usage), increase adhesion to non porous surfaces, improves application properties of later on applied adhesive
Working timeTime between end of waiting time and moment when the application is no longer possible

Uses

EPONAL 383 is a two-part solvent-free epoxy smoothing coating suitable for:

resurfacing and reshaping of concrete substrates
bonding waterproofing membranes
crack bridging

Benefits

Solvent-free
Complies with the regulations concerning organic products in contact with drinking water
Free from aromatic amines and benzyl alcohol

Properties

Physical:

Bostik method N°	Characteristics	Resin (Part A)	Hardener (Part B)	Blended
00.010	Consistency	Thick paste	Thick paste	Thick paste
00.020	Colour	whitish	black	grey
01.052	Specific gravity at 23°C	1.47	1.45	1.46
01.344	Brookfield viscosity, spindle D, 2.5 rpm at 23°C	320 000 mPa.s	480 000 mPa.s	224 000 mPa.s
	Mixing ratio: by weight	100	45
06.060	Working time at 23°C, 100 cm3			about 1 hour
	Pot life at 23°C, 100 cm3			3 to 3½ hours

Mechanical properties after 7 days cure at 20°C

HARDNESS	Shore D: - 24 hours - 4 days - 7 days	74 75 78
TENSION	Tensile strength @ break Elongation @ break Young modulus	25.7 ± 2.6 MPa 0.5% ± 0.1% 6300 ± 400 MPa
COMPRESSION	Compressive strength % Compression Young modulus	78.0 ± 5.9 MPa 3.9% ± 0.5% 4550 ± 550 MPa
FLEXION	Flexural stress @ break Bending deflection @ break Flexural modulus Eb	50.4 ± 4.2 MPa 1.5 ± 0.2 mm 6150 ± 450 MPa

Consumption:

600 to 800 g/m² (depending on the state of the substrate)

Shelf life:

Up to 12 months in the original, unopened containers, stored in a dry place between +15°C and +35°C. The product must be protected from frost as it may cause product crystallisation.

Application

Application conditions

Working temperature: +10° to +25°C

Relative humidity: maximum 80%

During application and cure, substrate temperature must always be at least 3°C above the dew point temperature during application and cure.

Surface preparation
Preparation should be in accordance with building standards. Surfaces must be clean, sound, dry, of adequate compressive and tensile strength (at least 25 MPa and 1 MPa respectively after 28 days cure for new concrete). They must be free from laitance, clean and free from dust, grease, curing compounds or any other contaminants that would inhibit proper bond. Depending on surface condition and type, substrates are treated by abrasive blasting, mechanical planing, scabbing, sandblasting, high pressure water washing or chemical stripping. After mechanical treatment of a subfloor, thoroughly vacuum all dust.

Steel surfaces should be sanded or abrasive blasted to a white metal finish, then degreased with MEK (Methyl Ethyl Ketone) and primed with EPONAL 382.

Application of EPONAL 383
Slowly add the hardener into resin (components A + B) while mixing, mix thoroughly for 2 to 3 minutes with an electric drill and mixing paddle (speed: not more than 300 rpm in order to avoid air bubbles inclusion). Apply immediately the mixture with a roller onto the substrate.

Apply onto a dry coat of EPONAL 382 primer a coat of EPONAL 383 at a rate of 600 to 800 g/m² (depending on the state of substrate) using a trowel or putty knife.

Packaging

Presentation	Bar code	Bostik code
metal kit - 5 kg	3549210009610	175551