A liquid sealant is a sealing compound that comes in a paste or liquid form. The advantage of this type of sealant is that it remains in its liquid form while it is being applied, forming a film which effectively waterproofs a surface. The advantage of liquid sealants start where the limit of solid sealants begin. They can adapt to any substrate which saves time, since you do not have to make an extensive pre-treatment procedure.
Advantages of Liquid Over Foam Sealants
The application spectrum for liquid sealants is wide and it can simply be painted on with a paint brush or roller. This makes it ideal for waterproofing wide, flat surfaces such as walls and roofs. A foam sealant will have to be dispensed from an aerosol can or by a professional, and is more ideal for sealing cracks and holes in the walls, and around pipes. Foam is also hard to rip off if you are going to do a repair or renovation later. Foam sealants then should never be used on delicate surfaces or near electrical wirings, since they would almost surely be damaged if the foam is taken off.
A liquid sealant reinforces and protects the surface it is applied on and is resistant to high winds. This makes it ideal to be applied on the exterior parts of your house, to protect its good appearance.