Activator Or No Activator: The Base Coat Dilemma (2025)

Whether or not you need an activator for your base coat depends on the type of paint you are using. Some base coats, such as the Nason base coat, require the addition of an activator before application. However, other base coats, particularly solvent-based paints, do not require an activator and only need to be reduced and sprayed. It is important to follow the instructions on the paint can and use the correct ratio of base coat to activator to ensure the paint applies correctly.

Nason base coat: mix ratio and application

Nason base coat is a solvent-borne basecoat designed for overall repairs to OEM basecoat/clearcoat finishes. It is applied in two medium-wet coats or to hiding, with a flash time of around 15 minutes between coats. To improve flake control in metallic colours, a mist coat can be applied in conjunction with the final coat.

The Nason base coat should be mixed with paint activator and paint thinner or reducer before use. The recommended ratio is 8:1/2:4, or 8 parts of Nason base coat to 1/2-part base coat activator to 4 parts base coat reducer. Failure to mix the paint properly can result in spray gun clogging.

When using a paint sprayer, Nason Finishes recommends setting both gravity-feed and siphon-style spray guns to between 1.4 mm and 1.6 mm to apply the paint. Keep your hand even and move the spray gun back and forth at a distance of 8 to 10 inches from the surface of the car. Ensure you are working in an environment with low humidity and no chance of rain, as moisture will affect the paint's drying time.

If you are using aerosol cans, the paint should be properly mixed in the can, so you can skip the mixing step. Shake the can for two minutes to thoroughly mix the paint before use.

Allow the base coat to dry for at least 15 minutes before applying a Nason clear coat. Depending on the clear coat product, allow 8 to 12 minutes to dry, then apply a second clear coat.

Do you need an activator for base coat?

Whether or not an activator is needed for a base coat depends on the type of paint being used.

Some sources state that base coats are always mixed with reducers, and not with a catalyst, hardener, or activator. This is because the base coat does not need to worry about hardening. In this case, the base coat is mixed with a reducer at a 50:50 ratio, or a (1:1) ratio. This means mixing 1 pint of reducer with 1 pint of base, and then it's ready to be painted.

However, other sources state that an activator is needed for the base coat. For example, when using Nason base coat, it is recommended to use a ratio of 8:1/2:4, or 8 parts of Nason base coat to 1/2-part base coat activator to 4 parts base coat reducer. Failure to mix the paint properly can clog your spray gun.

In addition, when using a single-stage paint, an activator is needed for the base coat.

When to use an activator for base coat

An activator is not always necessary when applying a base coat. However, there are certain situations where using an activator can be beneficial. Here are some guidelines on when to use an activator for your base coat:

Adding an activator to your base coat can make the paint stronger and more durable. If you are painting a surface that requires extra protection, such as a plastic bumper or a car exterior, adding an activator can be a good idea. In these cases, the activator will enhance the paint's strength and help it adhere better to the surface.

When working with metallic paints, adding an activator to your base coat can improve the metallic effect. It will help you achieve a more consistent and vibrant metallic finish. Therefore, if you are using metallic paint, consider adding an activator to enhance the overall appearance of your project.

Another instance where an activator can be useful is when you want to ensure better adhesion between the base coat and the clear coat. By adding an activator to your base coat, you can improve the adhesion of the subsequent clear coat layer, resulting in a more durable and long-lasting finish. This is especially beneficial for surfaces that are prone to chipping or require extra protection.

It's important to note that the decision to use an activator may also depend on the specific paint brand and type you are using. Always refer to the manufacturer's instructions and recommendations. Some paints may already include an activator, while others may suggest adding a small amount to enhance certain properties. Additionally, consider the environmental conditions, as activators can affect drying times, and proper drying is crucial for a smooth finish.

In summary, while an activator is not always required for a base coat, there are situations where it can be advantageous. By understanding the benefits of using an activator, you can make an informed decision based on the specific requirements of your project. Remember to follow the manufacturer's guidelines and take into account the environmental factors to achieve the best results.

How to apply base coat

How to Apply a Base Coat

Applying a base coat is an important step in achieving a long-lasting nail polish application. Not only does it help prevent nail discolouration, but it also improves the durability of your nail polish. Here is a step-by-step guide on how to apply a base coat:

• Start by cleaning your nails with gauze and nail polish remover to remove any residue or old nail polish.
• Apply a pre-primer to your nails. This will help remove excess moisture and ensure that your nail polish lasts longer.
• Rotate the brush in the base coat bottle neck to remove excess product and make the brush skinny.
• Using the tip of the brush, apply the base coat to the free edge of your nail in one swiping motion.
• Adjust the amount of base coat on the brush by scraping it against the bottle neck, making the brush flat.
• Place the brush as close to the cuticle area as possible, leaving a gap that is only the width of a hair. Then, drag the brush towards the free edge of your nail.
• Spread the base coat towards the sides of your nail, following the natural shape of your nail bed. Ensure that the brush does not touch your skin.
• Allow the base coat to dry completely before applying the nail polish.

When applying a base coat, it is important to remember that you don't need to add any catalyst, hardener, or activator. Base coats are typically mixed with reducers, usually in a 1:1 ratio. This means mixing equal parts reducer and base coat to achieve the desired consistency.

Base coat drying time

The base coat drying time depends on the temperature and humidity of the environment. In ideal conditions, it takes around 30 minutes for the base coat to dry. However, in high humidity, it may take up to an hour. To check if the base coat is dry, touch it gently; if it is smooth and your fingers don't drag on it, it is dry.

When applying the base coat, it is important to work in a well-ventilated area, wearing protective gear such as a respirator, eyewear, and gloves. The temperature should be between 70–80 °F (21–27 °C) for the best results. Before applying the base coat, ensure the surface is smooth and clean, and that any rust or scratches are sanded down.

The base coat should be mixed with a reducer at a 1:1 ratio. This mixture does not contain a catalyst, hardener, or activator, so there is no need to worry about it hardening quickly. Any leftover base coat mixture can be stored and used at a later date.

Frequently asked questions