Introduction

The following are general instructions for concrete waterproofing, repair and protection using SUPERSHIELD DPC (Deep Penetrating Capillary) WATERPROOFING products. For detailed information concerning the products and their application please refer to the specific Technical Data Sheet and Application Guidelines under www.supershieldindia.com. For details concerning specific problem solutions please contact your local SUPERSHIELD distributor or SUPERSHIELD.

Preparation of Substrate

Concrete to receive SUPERSHIELD treatment must have a clean surface and open capillary system to ensure maximum bonding. Surfaces to be waterproofed should be examined for structural defects, and unacceptable conditions reported and Remedied.

Remove all cement laitance, shutter release agent, curing compound, loose particles, etc. by means of light, wet or dry sandblasting, high pressure water jetting or wire brushing. Water leaks must be stopped in accordance with the SUPERSHIELD PLUG Application Guidelines.

Remove all protrusions and cut back to sound concrete, chasing out any honeycombed or damaged areas where appropriate. Construction joints and shrinkage cracks exceeding 0.3 mm should be routed out to a minimum depth of 20 mm. Shutter tie holes should be roughened.

Clean all chased out areas, shutter-tie holes, etc. and pre-water until the concrete is saturated.

Following this, fill the areas with appropriate SUPERSHIELD CRYSTALPATCH in layers, the number depending on the total layer thickness.

Pre-Watering

Prior to applying SUPERSHIELD, carefully rinse all the surfaces to be waterproofed and pre-water with clean water. Pre-water several times so that the concrete is thoroughly saturated. When SUPERSHIELD products are applied, the surface should be damp but not wet. Any surface water on horizontal surfaces must be removed.

Mixing

Place SUPERSHIELD powder in a clean container, add the indicated amount of clean water or polymer dispersion for two component products and stir for at least 3 minutes with a mechanical mixer until the mixture is completely free from lumps.
To maintain workability do not add water, simply re-stir the mixture.

Once mixed, SUPERSHIELD materials have a limited pot life. Refer to Technical Data Sheet for details. Do not mix more material than can be used within pot life.

Climatic Conditions

Do not apply SUPERSHIELD at temperatures below +5 °C (40 °F) or to a frozen substrate unless otherwise indicated for specific products.

Application

Brush Application
Specific SUPERSHIELD products (refer to product's Application Guidelines) can be applied using a suitable brush (mason's brush). Ensure that all cavities in the substrate are filled in order to exclude any trapped air.

If several layers are applied it is recommended that the following layer is applied whilst the previous layer is still damp. The waiting time before applying the following layer depends on the specific product and on local climatic conditions such as humidity, temperature, etc. The previous layer must not be damaged during application of the following layer.

Spray Application

SUPERSHIELD may be applied using appropriate fine mortar spraying device. The air pressure, air volume and nozzle size required will depend on the type of SUPERSHIELD material to be sprayed.

The compressor performance must be at least 5 bar pressure, delivering 500 l/min.

The first layer of SUPERSHIELD is applied in circular motion with the spray nozzle held at a 90° angle to the substrate. The distance between the spray nozzle and the surface will depend on the spray gun/compressed air used. The material is then flattened with a suitable trowel. This operation levels the surface and increases adhesion to the substrate.

If several layers are applied it is recommended that the following layer is applied whilst the previous layer is still damp. The waiting time before applying the following layer depends on the specific product and local climatic conditions such as humidity, temperature, etc. The previous layer must not be damaged during application of the following layer.

SUPERSHIELD Dry sprinkle and power trowel application

When the concrete to be treated starts to reach initial set, the specified amount of SUPERSHIELD is dry-distributed by hand using a sieve or garden type fertilizer spreader on to the concrete surface.

It is then trowelled in until coverage is uniform and the specific finish is achieved. Where specified SUPERSHIELD is dry distributed to blinding concrete or construction joints immediately prior to casting the structural slab or wall.

Additives are formulated differently to meet the requirement of the plastering and concrete mix .SUPERSHIELD CRYSTAL PLAST for plastering and SUPERSHIELD ADMIX for concrete.

Plastering Additive

Mix SUPERSHIELD CRYSTAL PLAST with water to form a very thin slurry (e.g. 1 part. of powder mixed with 2 parts of water) and add to the cement, sand mix.

The sand, cement and water should be added and mixed in accordance with standard practices (taking into account the quantity of water that has already used to form the thin slurry).

Concrete Additive.

SUPERSHIELD ADMIX is added to the concrete at the time of batching. The sequence of procedures for addition will vary according to the type of batch plant operation and equipment.

1. READY MIX PLANT - DRY BATCH OPERATION

Add SUPERSHIELD ADMIX in powder form to the drum of the ready-mix truck. Drive the truck under the batch plant and add 60% - 70% of the required water along with 300 lb. - 500 lb. (136 kg - 227 kg) of aggregate. Mix the materials for 2 - 3 minutes to ensure the ADMIX is distributed evenly throughout the mix water. Add the balance of materials to the ready-mix truck in accordance with standard batch practices.

2. READY MIX PLANT - CENTRAL MIX OPERATION

Mix SUPERSHIELD ADMIX with water to form a very thin slurry (e.g. 1 part. of powder mixed with 2 parts of water). Pour the required amount of material into the drum of the ready-mix truck. The aggregate, cement and water should be batched and mixed in the plant in accordance with standard practices (taking into account the quantity of water that has already been placed in the ready-mix truck). Pour the concrete into the truck and mix for at least 5 minutes to ensure even distribution of the SUPERSHIELD ADMIX throughout the concrete.

Curing and Protection

SUPERSHIELD products are cement-based and will cure and harden in the same way as ordinary concrete. Setting and hardening will depend on the surrounding temperature and humidity.

For maximum effectiveness from your SUPERSHIELD treatment, it is essential that the layers are kept damp for at least 3 days and protected against evaporation by sun and wind.

Careful post-watering should be carried out at intervals, starting the day following the application. Alternatively, the surfaces can be covered with plastic sheeting, wet mats or moist sand. The use of curing compounds is not recommended. In closed spaces and deep pits, air circulation should be provided for 24 hours following the SUPERSHIELD application.

For polymer-modified two component products observe product specific information on Technical Data Sheet and Application Guidelines.

The freshly treated surfaces should be protected from rain for a minimum period of 24 h. Surfaces treated with SUPERSHIELD should be protected from frost for at least 5 days. If necessary, cover with insulation mats.

Backfilling

Backfilling can be carried out 3 days after completion of the SUPERSHIELD treatment.

Decoration, Coating, Tiling

All surfaces treated with SUPERSHIELD products, which are to be coated or painted, must be left to cure for at least 2 weeks.
DPC waterproofing products At the end of the curing period, prior to the application of coatings or paints, the surfaces should be saturated with water and neutralised with 1:8 solution of hydrochloric (muriatic) acid. Following this, the area must be thoroughly rinsed with water.

Precautions: When spraying with hydrochloric (muriatic) acid solution, use protective rubber clothing and goggles.

Filling of Water Retaining Structures

In accordance with standard water industry practice, particular note needs to be taken of the following points:

Clean all surfaces (ceiling, walls, slab, columns, stairs, etc.) with drinking water (do not use high pressure) Remove all cleaning water Disinfect all internal surfaces with approved disinfectants Remove all disinfectant.

Filling can take place when the surface treatment has hardened sufficiently, usually not less than 14 days after application.

However, if earlier filling is specifically required, filling may be considered after not less than 7 days, provided the surface is thoroughly checked for hardness.

Additional Information

SUPERSHIELD treatments are waterpoofing and protective, not decorative finishes.
Discolouration of the treated surface may occur. Such discolouration in no way detracts from the waterproofing effect.

Health and Safety

Cementitious SUPERSHIELD products are irritating to skin. Risk of serious damage to eyes. Keep out of reach of children. Do not breathe dust. Avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable gloves.

For further information please refer to Material Safety Data Sheet.