GAC 100 is a 100% acrylic polymer-based clear multi-purpose liquid primer that is great for sealing surfaces such as hardboard, tempered masonite, and the like, but did you know there are other alternatives that work just as well? In this post, we’ll explore a few of these alternatives and show you how they compare to GAC 100. So if you’re looking for a new sealant or just want to learn more about your options, read on as I detail 5 GAC 100 alternative products that are easy to find and use.
What is GAC 100 and how is it used?
GAC 100 (made by Golden Paints) is a clear polymer primer that is typically used to seal surfaces such as hardboard. Because it is a polymer, it dries hard like a hard latex layer (plastic) and it will not yellow over time and provides a durable finish. It can also be used on other surfaces such as metal, glass, and plastic. It actually looks like PVA glue and has a similar consistency.
It can also be used on other surfaces such as metal, glass, and plastic. To use GAC 100, apply it to the surface you wish to seal and allow it to dry. Once dry, the surface will be sealed and ready for painting.
You can also use GAC 100 as a color extender, when added to paint you can dilute the paint and also extend it. You can also use GAC 100 to make your own paints by adding powdered pigment to a small amount and mixing it in. This will make a paint that is similar to acrylic paint.
What are some GAC 100 alternatives?
There are a few alternatives to GAC 100 that can be used to seal hardboard. One alternative is gesso.
Gesso
Gesso is a white liquid primer that is typically used to prime canvases. However, it can also be used to seal hardboard. To use gesso, just apply it to the surface you wish to seal and allow it to dry. Once dry, the surface will be sealed and ready for painting.
Can also be purchased in large quantities for use on larger substrates to save money.
Can it be painted over? Yes, gesso can be painted over. Once gesso is dry, it forms a hard, white surface that can be painted over with any type of paint.
How long does Gesso take to dry before you it can be painted on? Gesso can be painted on within an hour of it being applied. The consensus is to wait between a day or two (24-48 hours).
GAC 100 vs Gesso
Gesso is a cheaper alternative to GAC 100. However, GAC 100 is typically used when a smoother surface is desired. Gesso can also be sanded down if necessary, whereas GAC 100 cannot.
If you are looking for an alternative to GAC 100, gesso is a great option. It is cheaper and dries quickly, making it ideal for those who want to get started on their project right away.
Liquitex Acrylic Medium
Another alternative to GAC 100 is Liquitex acrylic medium. Liquitex Acrylic Medium can be used to thin out paint, add texture, or create a gloss finish. It can also be used to seal hardboard. To use acrylic medium, apply it to the surface you wish to seal and allow it to dry. Once dry, the surface will be sealed and ready for painting.
Not recommended for large scale artworks as it can get quite expensive to cover the substrate.
Can it be painted over? Yes, Liquitex acrylic medium can be painted over by both acrylic and oil paints.
Note: If you find the paint is having trouble taking to the surface, give it a light sanding to give the surface some tooth.
How long does Liquitex Acrylic medium take to dry before you it can be painted on? Within an hour.
B.I.N. Shellac or Generic All Surface Primers
BIN shellac and generic brand all surface primers are one of the cheapest GAC 100 alternatives. Bin shellac and all surface primers are a primer/sealer that can be purchased from most hardware stores and can be used to seal hardboard, as well as other surfaces. To use these products, brush or spray it onto the surface you wish to seal and allow it to dry. Once dry, the surface will be sealed and ready for painting. It usually dries matt and makes a great painting surface on most hard substrates.
Can it be painted over? Yes, these can easily be painted over. They are designed specifically to be painted over by most types of paint mediums.
How long does they take to dry before it can be painted on? Fully cures within 1 to 2 days, can be touch dry within a few hours if you are in a rush.
Polycrylic
Another alternative to GAC 100 is polycrylic. Polycrylic is a polyurethane based protective finish that can be used to seal hardboard. It is available in a variety of finishes, including gloss, semi-gloss, and satin. To use polycrylic, apply it to the surface you wish to seal and allow it to dry. Once dry, the surface will be sealed and ready for painting.
Can it be painted over? Yes, polycrylic can be painted over with acrylic paints and most water based paints. Do not paint over polycrylic sealed surfaces with oil paints as this will cause it to peel.
Note: If you find the paint is having trouble taking to the surface, give it a light sanding to give the surface some tooth.
How long does Polycrylic take to dry before you it can be painted on? 24 hours for it to be fully cured and ready to be painted on.
Mod Podge
Finally, the last alternative to GAC 100 is mod podge. Mod podge is a water-based sealer, glue, and finish all in one. It can be used to seal hardboard, as well as paper and other surfaces. To use mod podge, apply it to the surface you wish to seal and allow it to dry. Once dry, the surface will be sealed and ready for painting.
Can it be painted over? Yes, mod podge can be painted over.
Note: If you find the paint is having trouble taking to the surface, give it a light sanding to give the surface some tooth.
How long does Mod Podge take to dry before you it can be painted on? 24 hours for it to be fully cured and ready to be painted on.
GAC 100 alternatives – Wrap up!
So there you have it, 5 alternatives to GAC 100 for sealing hardboard. Whether you’re looking for a cheaper option, a more durable option, or an all-in-one option, one of these options is sure to be perfect for you.
Do you have a favorite GAC 100 alternative that I have not listed? If so send me a message via the Contact Us page and let me know the details.
If you found this post useful, feel free to share it among your friends and have a look at some of the other articles that I have written, I am sure there is something you will find of interest. Thanks!
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Cover Image by Sophie Janotta from Pixabay
