Exterior Surfaces
Can I apply exterior filler onto damp walls?

MASONRY REPAIR FILLER is very good for deep masonry repairs, can be shaped, and can be applied to damp masonry. You can use it to fill big defects in the substrate and you can also skim with it. It's paintable after 48 to 72 hours.

Can I skim with exterior filler?

Yes! Our EXTERIOR SKIMCOAT FILLER comes in powder or ready mixed version. It is designed for smoothing old or damaged render and can also be used to skim over masonry locally

What can I use on exterior surfaces that have been painted?

The best exterior fillers for covering previously painted substrates are ROCK SOLID REPAIR FILLER and TOUGH MULTI FILLER.


Due to its cement content MASONRY REPAIR FILLER is much more weather-resistant than most fillers durable. We do recommend overpainting with exterior paint for the best possible weatherproofing.

Are exterior fillers sandable?

Exterior fillers are tougher than interior fillers because they are designed to endure harsh conditions. This makes sanding more difficult. We recommend that our exterior fillers are not overfilled, to avoid the need for excess sanding.

Interior Surfaces
Can INTERIOR FILLER be used on wood as well?

INTERIOR FILLER isn’t suitable for wood but WOOD REPAIR FILLER will be perfect. You will be able to paint or stain it in 3 hours. 

When you say no need to spot prime and will not flash, is that for all paints regardless of sheen level?

Yes. Any paint is fine. Just make sure the filler is completely dry before you start painting.  


Joint Skill and Fill
What’s the difference between JOINT, SKIM & FILL: QUICK DRY and PATCH & REPAIR FILLER: QUICK DRY?

There are a couple of important differences between these products, which are designed to complement each other. JOINT SKIM & FILL is designed for doing large areas of jointing and skimming, PATCH & REPAIR for smaller holes and cracks.

First, the adhesion on JOINT, SKIM & FILL powder conforms to European Standard EN 13963 which concerns reaction to fire and flexural strength for jointing products. For this reason, we proudly bear the CE logo on the jointing products in the range. This is the standard that’s required for commercial jointing, so you can be sure the product will stand up to the job.

Secondly, PATCH & REPAIR powder is a bit harder than JOINT, SKIM & FILL powder when dry. Because JOINT, SKIM & FILL is primarily designed for smoothing over larger surface areas, the formula helps to make the job of sanding over large areas easier and more comfortable! But sanding is still easy when using PATCH & REPAIR to fill smaller holes and cracks.

What is the difference between JOINT & SKIM READY TO USE and RENOVATION SKIMCOAT?

The JOINT & SKIM product is very fine and is designed mainly for taping and jointing and fine skimming on plasterboard. The RENOVATION SKIMCOAT is especially good for levelling surfaces and thicker applications, such as covering textures (but can also happily be used for taping and jointing).

When skimming, my filler sagged, didn’t cover well and didn’t dry as quickly as it should. What’s going wrong?

When using powder fillers, make sure you are using the correct mixing rate of water to powder. If you use too much water the filler will be ‘loose’. The mixing rate is stated on the packaging. For a smooth mix, don’t forget to add the powder to the water. Not the other way round! 

Do you have a skim filler that can be applied with a roller?

Yes, all of our skimming products can be applied with a roller assuming you will smooth over with a trowel or knife afterwards. This is important because some fillers may crack if the coating is too deep.

Can Joint, Skim and Fill skim over Artex and have a long-lasting, hard finish?

Our Joint, Skim and Fill ready mixed and powder products will both do the job depending on the depth of the Artex. If it’s been de-nibbed, either would be fine and will be just as hard as plaster, dry wall and other fillers.

Do your fillers still allow the walls to breathe if a large area is covered?

Yes, they do. Our fillers are moisture vapour-permeable so your wall will be able to breathe, even if a large area is covered.

Preparation of the substrate
Do your fillers set chemically or atmospherically?

All our powder fillers set chemically and then dry atmospherically. In fact, all powder fillers containing plaster or cement work this way. The plaster or cement reacts with the water first to set to a solid crystal lattice. That structure is then fixed while the water evaporates until it becomes fully dry. Our ready-mixed fillers dry atmospherically - they lose moisture through the substrate and in the air. This is because no chemical reaction takes place when you use our ready-mixed fillers.

Problem Surfaces
How to use FILL-FLEX?

FILL-FLEX is a flexible filler for gaps & cracks where there is movement, for example between two different surfaces such as walls and skirtings or architraves. Because it’s highly flexible it will accommodate any movement and will not crack. It can be used indoors and out on most common substrates, including plaster, masonry, primed wood & paintwork.

How to use SKIM-FLEX?

SKIM-FLEX is an extremely versatile ready-mixed skimcoat filler and is ideal for covering large areas of difficult substrates. We recommend using a smoothing blade or trowel.

  • It can be used indoors and out
  • It can be used on virtually any substrate, even very soft surfaces like cork and hard surfaces such as ceramic and glass tiles.
  • It remains flexible once dry, so is ideal for covering surfaces where there may be some slight movement
  • It’s easy to sand, is water vapour permeable and so allows the substrate to breathe.
  • It can be covered with most everyday paints
Are you supposed to fill over FILL-FLEX with something else?

FILL-FLEX is a highly flexible filler for applying to moving cracks. It can be overfilled with any Toupret filler (e.g. FINE SURFACE FILLER) or you can paint directly over it.

Can you sand FILL-FLEX?

FILL-FLEX is sandable but it’s not easy because it is so elastic. We recommend removing any excess filler with a wet sponge immediately after applying it, rather than waiting for it to dry. If you are having difficulties with sanding FILL-FLEX after it has dried, scrape it back below the surface then apply another Toupret filler over the top.

Does ANTI DAMP RENDER solve the damp problem?

ANTI DAMP RENDER is a great solution for substrates where the source of the damp can’t be stopped, such as retaining walls, garages and basements. It can be applied over damp substrates and is moisture vapour permeable once dry, which means it allows the damp substrate to breathe by letting any moisture vapour through rather than blocking it (which can encourage the moisture to spread and create problems elsewhere). For best results, always remove any residual plaster and render before applying ANTI DAMP RENDER and, if overcoating, use a moisture-vapour permeable paint.

Where to buy ?
Can I buy direct from Toupret?

Unfortunately, we don’t sell direct, but you can find your nearest distributer on the Find a Distributer page of our website. Or if you’d like to Contact Us we can ask your local Toupret sales/technical representative to get in touch. 

Does Toupret have any stockists in Ireland?

We distribute via Relay global in Ireland. You can find stockists on their website.  

Wood Surfaces
How does WOOD REPAIR compare to a two-part wood filler?

There are several advantages of using our powdered WOOD REPAIR FILLER:

  • It has a longer working time of around 30 minutes, great for perfecting awkward fill and repair jobs without rushing
  • It is low odour, so great for using on inside jobs
  • It’s easy to sand
  • It can be painted in 3 hours
  • It doesn’t flash
  • It’s extremely adhesive and durable
  • It’s takes drilling & screwing
Can INTERIOR FILLER be used on wood?

We don’t recommend using interior fillers for un-primed wood, but our ready mixed WOOD FILLER or WOOD REPAIR FILLER in powder form will be perfect.

When filling wood, do you prime before filling or fill before priming?

It depends! Our wood fillers can be used without any kind of priming if the wood is in good condition. If the wood you’re filling is in any way unstable – for example, damp, crumbly, powdery, mouldy – then you should clean away all of the damaged material and then it’s a good idea to apply a primer before filling, to give the filler a stable surface to adhere to. We have a WOOD HARDENER in our range that would do the job. As for priming after the fill, this isn’t necessary with Toupret wood fillers. You can apply any kind of coating straight over them.