A Better Understanding Of Additives In Stucco

A Better Understanding Of Additives In Stucco

There are many different components that you can add to stucco to change the way the mix reacts to certain circumstances. You can also add elements to the color to get a more customized look to the finish.

These are things that get added into the mix once the sand and water have been added. These modifiers can increase overall tinsel strength, reduce cracking, make a more waterproof cement and harden the surface of the mix.



These are fibers that are dispersed throughout the mix to increase the strength of the base coats and minimizes the chances of cracking. These can come in the form or fiberglass or acrylic based materials.

Stucco Mesh:

This is simply a large roll that is embedded in a thin layer of cement to greatly strengthen the base coat. First, a thin layer of cement is put on the wall, then the mesh is embedded by troweling it into the material. It comes in many different sizes and lengths for easier application.

Acrylic Additives:

These typically help with the overall bonding of the cement, helps in the curing process and makes the mixture more workable. It is ideal for crack repair and patches and is also used in many scratch and brown coats today.

You will want to make sure that you have some sort of measuring container to add the proper amount of admix to the base. An old plastic bottle works well for this.

Manufacturer’s Additives:

When using a particular system of certain manufacturers, they will oftentimes have their own line of products that you can add in that are specifically designed for their system. These are designed the same way all the other supplements are, but are made to coincide with the companies’ products.

Supplements In The Color Coat:

Certain coloring agents can be added to the finish coat of the stucco to achieve a certain look when the finish coat is dry. Powdered and liquid colors are added into the mix in order to achieve this. Some color applications are also added to the top coat after it has dried, giving it a faux or modeled finish.

Powdered Color Packs:

These are primarily for cementatious type of stucco finishes and are not used in acrylic finish coats. The color is usually added to water before the finish coat is added, to ensure that the color is mixed evenly prior to adding the base material.

Acrylic Color Bottles:

These are used in acrylic stucco applications and are added the same way the powdered one are. The acrylic base comes in 5 gallon buckets and is already mixed together, minus the color.

The Stucco Guy

My name is Ryan and I have been in the construction trades for many years now and I feel that there is a huge "knowledge gap" when it comes to particular trades.... like stucco. I made this site to inform others about the simplicity of the art and that many people can do stucco themselves, if they put their minds to it. I hope you find the information here useful and please don't hesitate to contact me by leaving a comment. Thanks for stopping by! (Pic Coming Soon!)

4 thoughts on “A Better Understanding Of Additives In Stucco

  1. nancy/sculptor

    Interested in indoor use ….hazardous or safe….also using this in a mold to form a shape???

    1. The Stucco GuyThe Stucco Guy Post author

      Most of the additives are synthetic in nature but safe overall. I would mix the materials outside because some have a strong odor (acrylic especially) and a well ventilated area is the best place to mix the mud. Yes it can be used for molds, I do it all the time!


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