Uni-Epoxy NS

PRODUCT DESCRIPTION

Uni-Epoxy NS is an engineered, 100% solids, moisture-insensitive, long pot life, and non sag epoxy resin system. It is specially formulated and conveniently packaged for repair specialists, contractors and industrial users to assure simple application.
Uni-Epoxy NS meets the requirements of ASTM C-881-78 Type I, II and III, Grade 3, Class B and C. Uni-Epoxy NS contains no oil extenders or plastisizers.

SURFACE PREPARATION

The surface must be clean, sound and free of dirt, oil, and rust, standing water, paint, laitance and any other contaminant that can interfere with bonding. The surface can be prepared by sandblasting, shotblasting,

scarifying, chipping or acid etching. If acid etching is used, all residual acid and salts must be removed from the surface by thorough rinsing with water.

The minimum acceptable bonding condition is a damp substrate surface dry, but all standing water must be removed.

The temperature of the substrate must be between 5oC and 38oC during placement. Lower temperatures prolong cure time and inhibit proper bonding. Temperatures above 38oC shorten pot life.

MIXING

Mix only the material that can be used within the pot life period. The pot life (gel time) is 75 minutes at 25oC. Warmer temperatures will shorten pot life and cooler temperatures extend pot life.

Prior to mixing, condition the grout components to a temperature range of 15oC to 27oC for optimum installation. Combine Component A, resin, and Component B, curing agent, and then mix thoroughly until a uniform, streak-free, grey mixture is obtained using a Jiffy® mixer or equivalent powered by a slow drill (450-600 revolutions per minute). The white epoxy resin and the black curing agent must be blended to a uniform grey without streaks or lumps.

After components are thoroughly mixed, aggregates may be added for grouting and patching application. Slowly pour the desired amount of dry aggregates into the mix under constant agitation and blend thoroughly. Up to two volumes of aggregates may be added for each volume of epoxy.

APPLICATION

For use as a bonding agent, apply epoxy to existing concrete or other construction surfaces with a brush, r or trowel. Recommended coverage is 1.7 l/m2 for rough surfaces to 0.6 l/m2 for smooth surfaces. Pour the mixed concrete while the epoxy is tacky. If the epoxy has hardened before pouring it, mechanically scarify the hardened epoxy surface before recoating. Best bonding is achieved if the concrete has a slump of 50mm or less. Concrete with a slump in excess of 100mm should not be used.

For use as an epoxy mortar for patching and grouting, the thickness of the patch or topping should be 6mm to 25mm. Deeper applications should be patched in layers. Allow each layer to cool before adding subsequent layers.

Uni-Epoxy NS may be towelled neat into shallow cracks and voids.