Hot Applied Waterproofing Tools

Tools

• Hot-applied waterproofing comes in blocks. You need a twin wall kettle with continuous agitation to melt the blocks at 350-degrees. You can apply the reinforcing fabric with a roofing mop or a felt-laying machine. A paint roller with a long handle makes applying primer easier on the back. Wear personal protection equipment, such as gloves, knee pads and a mask, to avoid any adverse effects from fumes during the melting process.

Surface Preparation

• An existing surface should be clean of debris and dirt before you begin. If you are pouring new concrete, it should be water-cured, with a light, hair-broom finish. The concrete should cure for two to three weeks. For best results, apply an approved primer in a 6-inch-wide path along cracks and sealed expansion joints, and allow it to dry. With an approved contact adhesive, cover the primer with reinforcing fabric in a 12-inch-wide path. The final step in preparation is to apply a thin coat of primer to the entire surface.

Installation

• After you melt the waterproofing blocks, apply the waterproof coating in two layers. The first layer is thin and, while it is still warm and sticky, cover the area with reinforcing fabric. Follow that up with a second coat, twice as thick as the first.

Limitations

• Although this product provides protection from moisture, some circumstances reduce its ability to be effective. You should not use this system on lightweight insulated concrete, concrete containing curing compounds or additives, or on decks with existing waterproofing materials. Applying this product when temperatures are below freezing or when the surface is damp also reduces its effectiveness.