Before applying your best color paint on your interior walls, it is often recommended you apply a suitable primer. Whether to use a primer or not mostly depends on factors such as cost and time. Once the cost factor is no longer an issue, the choice of which specific primer to use will depend on how long it takes to dry. It is often preferable that a fast drying primer is used so that the paint job can begin as soon as possible. Therefore, before making that choice of the fastest drying primer, it is important for DIY painters and professional a like understand the varying drying times of their favorite primers in the market.
It is vital that a prime completely dries before you begin your paint job. Some factors to consider that influence the dry time of primers include:
Factors influencing how long it takes Primer to dry
The ideal temperature for a primer to dry is about 25 degrees Celsius or 77 degrees Fahrenheit. Lower temperatures increases the drying time of primers. It is therefore important the temperature be maintained at or close to the recommended level as possible.
Just like temperature, the humidity to should be maintained at a specific desirable value. When the humidity is high, the primer is exposed to a lot of water vapor the time taken for the primer to dry is longer as the water content takes longer to evaporate. On the other hand lower humidity lowers the drying time of a primer. The ideal relative humidity level is often of about 15%. To achieve this level, a dehumidifier can be used to control the level of humidity.
Type of primer being used
Different primers from different manufacturers have varying drying times. If the manufacturer use oil instead of water, the primer takes longer to dry. Therefore, water based primers dry quicker.
Method of application of primer
Indoor or outdoor project
When the primer application is carried outside, you have less control of the conditions. Mostly the drying time is at the mercy of the elements. When the humidity is high, the primer will take longer to dry. Similarly, a wet day will see longer dry times. Therefore, when applying a primer outside the house, it is important to choose a day with favorable conditions to ensure fast drying.
The ventilation of your room can lower increase the drying time of your primer. For fast drying times, ensure the windows are open, use a dehumidifier, or fans, to increase air circulation which gets rid of any humidity and increases the rate of drying. Additionally, dust and particles in the air should be gotten rid of as they attach to the primer when drying.
Types of Primers
Oil Based Primers
Oil based primers are best known for the versatility they provide. Unlike any other primers these categories can be applied on numerous surfaces. For instance, you can use them on wooden surfaces that have been painted or not, for exterior or interior use, metal surfaces and surfaces that are porous. Additionally, they do a good job in concealing stain on surfaces. Oil based paints are either alkyd made with synthetic oils, or linseed made with natural oils. Of these two types, alkyds are preferable as they are less expensive and tougher.
Advantages of oil-based paints
- Withstands temperature variations
- Suitable for surfaces in constant contact with people since they prevent stains
- Suitable for trim jobs
- Takes long to dry (24 hours)
- Require mineral spirits and turpentine for finishing
- Difficult to clean
- Should not be used on masonry
- Release high amounts of volatile organic compounds (VOCs) which are harmful.
This category of primers are water based. These primers can also be applied for both interior and exterior use on various surfaces such as wood, drywall, plaster, painted walls and plaster. Unlike oil-based primers, latex based primers are faster drying, less brittle and more flexible. Additionally, these type of primers emit less VOCs. These are best suited for woods not fully seasoned and wood having some dampness
Advantages of Latex Primers
- Fast drying time
- Low to no VOCs
- Cleaning them is easier
- Healthiest options
- Ease of application
- multiple coats within shorter time periods
Disadvantages of Latex Primers
- Sanding is often necessary
- Oil-based cleans better
- Not suitable for glossy surfaces
- Unsuitable for raw woods and unfinished MDF
This category of primers is best known for its stain blocking capability. Although not as versatile as oil-based or latex primer, this category works best on had to adhere surfaces covering large stains, surfaces damages by smoke or water and can even cover smelly surfaces. Additionally, they can cover stains from water, smoke, and wood tannins while preventing them from breaking the paint. This primer can be used together with the other two and can be applied on surfaces such as wood, metal, and plastics.
- High adhesiveness
- Fast drying
- Can be used with both latex and oil-based primers
- Very easy to apply
- Most effective at blocking stains and smells
- Rarely requires sanding
- Less versatile compared to the other categories
- Smellier compared to the other primers
- Hard to clean off
- Unsuitable for highly humid interiors
- Not suitable for surface exterior applications
In conclusion, depending on the wood project at hand, there are adequate options for the type of primer one would require. Even when the consideration is the time period required for the primer to dry so you can apply paint. The drying time of a primer also depends on the other factors such as humidity or the type of wood. It is therefore advisable to maintain the other conditions as suitable as possible to achieve swift drying. Our choice for fastest drying primer is Krylon ColorMaster Paint + Primer because it dries within ten minutes.