Brick glue, also known as masonry glue and masonry adhesive, can be used to make repairs or build entire walls. Building with bricks has traditionally been done using mortar between the bricks, but some masons are using brick adhesive instead in certain cases. The best brick adhesive for a project will most likely depend on whether it will be used for quick repairs or to replace mortar. It may also be necessary to consider the temperature and the dampness of the area because some types of glue may not work as well in cold or wet weather.
Mortar used between bricks is generally thick and shows as part of the structure. When you want the traditional look of a brick wall, mortar may be your best choice. If you are building something like a small retaining wall or putting pavers into place, however, brick glue might be the easiest to use. Many projects like this are done using masonry glue because it can cure in only a few days while mortar usually takes at least four weeks to cure.
Most adhesive manufacturers offer several different types of products for different projects and circumstances. One of the most basic types is called standard grade or basic brick adhesive. This type may be best for such jobs as gluing veneer on brick for refacing or making minor repairs. Basic brick glue generally needs to be used in mild to warm weather, with the bricks completely clean and dry for best results.
Other types of brick adhesive are designed for less than ideal conditions. Some varieties, for instance, are designed for gluing wet bricks together. In the spring, outdoor masonry may be damp when something needs a repair. Using a brick adhesive designed to bond wet materials can help you build or repair when it needs to be done rather than waiting until everything is dry. Certain types of brick glue may also be suitable for wet and very cold conditions, such as for wintertime projects or repairs.
Flexible brick glue is made to withstand hard freezing and thawing without becoming brittle and cracking or breaking. These glues usually have less solvent content in them than other types. If you have trouble finding a glue designed specifically to withstand freezing, choose one with less solvent than the others. Most containers of brick glue list the purposes they are designed for on the package and give recommendations for their use to help you.
Some brick adhesives foam after they are applied to create more space between the bricks and give a mortar-like appearance. Certain types of glue may also be available in a variety of colors so you can match or contrast them with your brick colors. These allow you to end up with the finished look you want, though all types of brick adhesive may not be available in colored or foaming varieties.