Megapoxy LVS

For internal sealing of concrete tanks, waterproofing walls and floors, and toughening timber surfaces, Megapoxy LVS is a two-component, clear liquid epoxy formulated to penetrate porous substrates. With a low mixed viscosity of 90cps, it sinks into the pores of concrete, timber, bricks, mortar, and natural stone to seal, harden, and waterproof from within.

How it works

Megapoxy LVS functions by capillary action, penetrating deep into the substrate before curing. Once cured, it creates a high-strength barrier with a compressive strength of 80Mpa and a concrete bond strength exceeding 3Mpa, making the treated surface mechanically stronger than the concrete itself. It seals internal masonry walls, consolidates soft or porous brickwork, and hardens timber surfaces against wear. It also serves as the compatible primer coat for Megapoxy floor coatings, establishing a secure structural bond to the dry substrate.

Numbers that matter

• 90cps mixed viscosity: A thin liquid that easily penetrates fine pores and capillaries in dense substrates at 25°C.
• 80Mpa compressive strength (ASTM D695): Delivers a cured matrix that reinforces weak concrete and masonry under heavy mechanical loads.
• 30-minute work time (at 25°C): The working window to mix, apply, and back-roll the sealer before the chemical cure begins to thicken the liquid.
• 24-hour full cure (at 25°C): Reaches structural service strength within 24 hours at standard temperature, dropping to 12 hours at 35°C, and extending to 48 hours at 15°C.
• 4-hour thin film cure (at 25°C): Cures quickly when applied as a thin sealer coat, reducing the window before subsequent coatings can be considered.

Where to use it

• Concrete tanks: Internal sealing to prevent water egress or chemical penetration.
• Walls and floors: Deep-penetrating waterproofing barrier for porous masonry structures.
• Bricks and mortar: Internal sealing to consolidate old, crumbly, or dusting brick joints.
• Concrete floors: Hardening and dust-proofing porous concrete floors, or priming prior to applying Megapoxy floor coatings.
• Structural concrete: Protection against environmental ingress and carbonation.
• Timber surfaces: Toughening and consolidating soft, dry, or worn timber structures.

Limitations

• Must be applied to thoroughly dry substrates only; moisture will compromise adhesion.
• Do not apply at temperatures below 10°C.
• Must be applied as thinly as possible and not allowed to pool. If pooling occurs, excess material must be wiped up immediately to leave a thin surface film.
• Bonding to existing painted or coated surfaces will result in inferior bond strength compared to a freshly prepared substrate. All previous coatings must be removed.
• Wire brushing of metal surfaces is not satisfactory and provides minimal adhesion only.
• Inaccuracies in the 2:1 mixing ratio or poor hand mixing will lower the physical properties of the system, prevent a satisfactory cure, and cause discolouration with age.

Surface preparation

Concrete: Must be free from grease and oil. Remove surface laitance by scabbling, grit blasting, or grinding. If mechanical preparation is impossible, acid etch using a 1:1 mix of hydrochloric acid and water at a rate of 0.5 litres per square metre. Allow to react for 10 minutes, wash thoroughly, scrub with a stiff broom, and allow to dry for a minimum of 24 hours.

Metal surfaces: Grit blast to AS CK 9.4 - 1964 Class 3 finish, or mechanically abrade to a clean, bright metal surface, then flood with an industrial grade degreaser.

Timber: Remove all damaged, loose, or rotted timber back to a clean, dust-free surface.

Coated surfaces: Remove paint from concrete using flame-cleaning or a scutching tool, followed by diamond grinding or scabbling. Remove paint and galvanizing from metal using a high-quality paint stripper followed by grit blasting or grinding.

Application guide

Thoroughly mix Part A and Part B at a ratio of 2 Parts A to 1 Part B by volume. Apply using a brush or roller.

• Priming: Apply a minimum of 1 coat prior to overcoating with Megapoxy floor coating products.
• Coating, sealing, or hardening: Apply a minimum of 2 coats.
• Traffic window: Allow the system to cure for 18 to 24 hours before opening the treated area to traffic.
• Cleanup: Clean mixing implements and application tools immediately after use with Megapoxy Thinners.

Coverage

• Concrete (Wood Float Finish): 75m² per 15-litre kit.
• Concrete (Steel Float Finish): 150m² per 15-litre kit.
• Bricks: 75m² per 15-litre kit.
• Timber: 75m² per 15-litre kit.