If the slab is in a shaded area or an area that only gets a fraction of the sunlight during the course of a day, it may take significantly longer for the resin to disappear. If the slab is permanently in the shade, it may be necessary to pressure wash the slab to remove the residue after the curing time is completed. It is important to make sure that this product be applied in two good coats, waiting a day between coats, to ensure the best possible performance with this product. It is also very important to allow the product to be fully cured before any water comes into contact with the membrane. Please consult the product literature for application rates and methods.
Lump formation is usually the result of too rapid cooling of the asphalt emulsion after milling.
The rate of cooling during the post-milling process is often difficult to control, since asphalt emulsions have very poor heat transfer. A skin sometimes will form on the surface of the material while cooling in the storage tank - this is normal. During the packaging process, the material is pumped around a closed loop several times to re-homogenize the material. Sometimes this doesn't occur quite as easily, and small lumps get passed through the pump. Some of the larger ones are caught in a filter, but usually the smaller lumps still pass through the filter's screen mesh.