Lavarep F80

How to Apply Lavarep F80

Lavarep F80 is mixed with clean water and applied by trowel, spatula or mortar spray machine to a prepared, saturated surface dry (SSD) substrate.

1. Prepare the concrete. Remove all grease, contaminants, oil and loose material using mechanical tools. To avoid feather edging, neatly cut the repair boundary with a concrete saw to a depth of 10 mm, and fully expose all corroded steel including the rear of the bar.
2. Treat reinforcement. Clean reinforcing steel mechanically, paying attention to the rear of the bar to remove all corrosion products. Immediately coat the cleaned steel with one coat of Lavazinc EP or Lavafer.
3. Saturate or prime. Soak the substrate with water and allow excess to evaporate or use a sponge to reach a saturated surface dry (SSD) condition. If application must be done in a short period, apply a Megabond SBR slurry bonding coat.
4. Mix. Pour 3.30-3.75 liters of clean water into a container and slowly add the 25 kg bag. Mix with a spiral paddle on a slow-speed heavy-duty drill until homogeneous and lump free; always add powder to water and do not add extra water.
5. Apply. Force the mortar lightly into the prewetted substrate with a trowel or spatula: about 5 mm minimum, up to about 50 mm vertical, 20 mm overhead and 5-100 mm horizontal. For a second coat, cross-hatch and roughen the previous layer and let it take its initial set.
6. Spray large areas (optional). For large repair areas the mortar can be sprayed with a mortar spray machine. Check the gauging water and apply a sample area to confirm consistency and bond before full application.
7. Cure. Protect the repair from drying winds, sun or excessive heat. Cover with wet hessian cloth and polyethylene sheet for two days, or apply a recommended MATEX curing agent.
8. Clean tools. Clean tools with water before the product hardens; hardened material can be removed mechanically.

Summary of the method in the Lavarep F80 Technical Data Sheet. Always follow the full TDS on site.