will Ronseal wood filler harden without hardener?

I’ve been working on a project that requires me to use Ronseal wood filler. However, I don’t know if I need to add the hardener or not; the instructions just say “apply” and don’t mention anything about adding hardener.

It’s been over 24 hours since I applied it and still, no hardening has happened. Am I doing something wrong? What happens if you don’t add hardener to wood filler?

What happens if you don’t add hardener to wood filler?

If you don’t add hardener to wood filler, then it will not harden or set. It will stay sticky and wet for as long as it takes for the solvent to evaporate.

If you’re using an oil-based filler instead of a water-based filler, it may still dry out eventually, but this can take days or weeks (depending on the humidity in your area).

Do you need to use wood hardener?

The answer is yes, you can use wood hardener. It will speed up the drying process and make it much easier to sand.

But if you don’t have a wood hardener on hand, don’t worry about it. Most people find that their filler dries just fine without any extra help from a hardener.

How long does Ronseal wood filler take to harden?

It depends on the temperature and humidity

It takes longer in cold weather

It takes longer in humid weather

It takes longer when it is hot

It takes longer when it is cold or humid

Does wood filler set hard?

There are a few ways that wood filler will harden.

  • When it dries, the moisture evaporates and the filler becomes harder. You can speed up this process by using a hair dryer or blowing on it yourself, but be careful not to overheat or burn the wood around the patch.
  • If you leave your project outside in cold weather (below freezing), the air will get so cold that it sucks out all of the moisture from your wet filler, leaving behind an even stronger material than before!
  • If you put some heat directly onto your wood filler (like from a blow torch), similar things will happen—except now we’re talking about plastic instead of air! In fact, most kinds of plastic become molten when heated up enough (which is why melting them down isn’t good for your health).

How long does wood filler take to harden?

The answer to this depends on your specific situation, so let’s break it down a bit.

If you’re in a hurry and want to know how long it will take for your wood filler to harden, you can expect a small bottle of balsam fir spray-on wood filler to be dry within 3-4 days.

In contrast, if you’ve used the more traditional method of application using putty knives or other implements and need something that dries out completely over time in order for its surface to be sanded smooth before painting or staining with a clear varnish or polyurethane finish, then expect at least 7-10 days before any significant amount of curing occurs.

You may want to give at least two weeks (1 month) or longer depending on how thickly applied your mixture was initially during application as well as how much ventilation exists where you’re working (basements tend not to have good air circulation).

Why is my wood filler not drying?

If you have been wondering why is my wood filler not drying, there are a few things to consider. First, make sure you are using the correct hardener for your specific wood filler.

Some fillers require a fast-drying hardener while others work better with slow-drying products.

Second, make sure that you’ve used the correct product for your project or repair job. If you’re repairing furniture or some other piece of woodwork that needs to be finished quickly, then choose a fast-drying product like Gorilla Glue Wood Filler Sealer and Stain in one!

Why is my wood filler cracking?

The best way to fix cracking wood filler is by using Ronseal Wood Filler with Hardener.

Cracking can be caused by numerous reasons, but the most common cause is that it hasn’t been used correctly. For example, if you apply too much wood filler to the surface of your wood and then try to sand it off, this will lead to cracking.

If you’re painting over cracked or damaged areas of your furniture with paint or varnish, this can also cause cracks in your finish as well as in your filler.

To prevent cracking in these cases, use a small amount of filler at a time and make sure that there aren’t any visible gaps between each layer when it dries before applying another coat.

To repair cracked wood filler without hardener:

Clean out any cracks deep enough so they’re level with the rest of the surface if possible (this may mean cutting away some of what’s covering them).

Use masking tape around all sides except where it touches on top so no solvent seeps through underneath during cleanup later on; leave overnight for easy removal tomorrow morning without damaging surrounding pieces along with some good old-fashioned elbow grease!

How do you harden wet wood?

If you’re looking to harden wet wood, there are several options. You can use a paint hardener, a wood hardener or a solvent-based hardener.

There are also water-based products that will work well with wet wood. The trick is finding one that works best for your project and knowing how to apply it properly.

Water-based products use powdered resins mixed with water to create an adhesive that dries quickly once applied.

These types of products can be used on any type of wood but should be used in small amounts due to their high viscosity (thickness).

If too much is used at once, it may not dry completely before being applied again—which would result in an uneven coat of filler instead of being smooth enough for finishing projects like floors or cabinets!


We hope that we have been able to answer your question about whether or not the wood filler will harden without a catalyst.

If you have any other questions about using wood filler, please feel free to contact us here at Ronseal.

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Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

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