Red Devil Onetime Review – Lightweight Filler

Updated May 21, 2024 | Posted Sep 4, 2019 | Product Reviews, Sundries | 0 comments

Lightweight fillers definitely have their place in any decorator’s van, usually on a shelf or box with other sundries. They certainly get talked about on the Decorators Forum UK an awful lot. In this blog I’m going to explain why, as well as giving you my full Red Devil OneTime review. Click here to see online prices.


When to use Red Devil Filler


Generally, any time you’re decorating a room, you would fill imperfections on the walls as part of your prep, before applying emulsion. This is not when you should use your Red Devil. In fact, you’d be better off using a general-purpose powder filler, which dries faster and you can sand down.

But say you’ve done your prep and given all your walls a first coat of coloured emulsion. There will always be little liny imperfections you have missed! Frustrating! If you’re a perfectionist like me, which I’m sure you are, the job needs to be done correctly. This is where the Red Devil OneTime filler comes into its own. It is ready mixed so there’s no faffing around. Red Devil is nice and smooth and there is absolutely no sanding required. Simply go around the room with the filler, then touch up or “spot prime” the filler with your coloured emulsion, then apply your final coat.

Ooh, another occasion I’d use Red Devil OneTime filler is when I have lined the walls in a room ready to emulsion. I’m good at lining and I’m sure you would never notice my seams anyway, however, just to make sure, I wiz round every joint with a filling knife full of Red Devil. Sounds daft but it isn’t half satisfying.


Another time I’d use Red Devil Onetime filler is when I’m filling pinholes in timber. Powder filler contains too much water, which the timber can absorb and swell. Using a filler like Red Devil eliminates the problem.

All this to say, lightweight filler is very useful when decorating. It’s well worth picking a tub up when buying the rest of your materials.


Why Choose Red Devil OneTime?


I have used a lot of different lightweight fillers over the years. I like Red Devil OneTime because it seems to last in my van or on a shelf in my stores. It is smooth and it’s easy to apply, it doesn’t sag, it is reasonably priced, and you don’t need to sand it down!! What more do you want from a lightweight filler??

You can buy red devil online by clicking here, as well as numerous other places. I buy a lot of my paints at Crown Decorating Centre who also stock Red Devil and offer it up at a very competitive price. A tub of this stuff seems to last for months in my van, but I always have it with me on every job.



Red Devil Onetime Review - Lightweight Filler - Decorator's forum UK

This is a lightweight, ready mixed filler that is readily available from multiple stockists.

Product Brand: Red Devil

Editor's Rating:


  • Smooth.
  • Easy to use.
  • Lasts well.
  • No slumping.
  • Doesn’t need to be sanded.


  • Only good for surface blemishes and pin holes.
  • Requires 2-3 coats of paint to cover.

Updated May 21, 2024 | Posted Sep 4, 2019 | 0 comments

About the Author

About the Author

Mike Cupit has been in the decorating industry since 2002 and has mostly worked as a Trade Decorator in the domestic sector (peoples’ homes). Self-proclaimed “product geek”, Mike has a passion for paint and decorating tools. Mike now spends most of his time testing paint products and tools, comparing them to similar products on the market, and blogging about the industry in general.


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