Sealants buying guide


Filling holes and sealing windows are easy DIY jobs that anyone can do without too much hassle – as long as you have the right equipment.

What type of sealant is right for me?

There are plenty of good general-purpose offerings out there, but there are certain specially designed sealants that work for different jobs around the home. These include:

Roof and gutter

Exterior areas need treating differently. These sealants give you an easy option for repairing plastic guttering and different roofing.


Keep some of this handy for the bathroom. If you have a shower cubicle, bath or washbasin that needs a waterproof seal, silicone is the perfect solution.


This usually comes in a cartridge to fit a gun. There are a number of different colours on offer and it is great for sealing doorframes and windows. Although mastics are generally used to seal against water, they can also be used to fill cracks around the home, such as along a skirting board.

What type of filler is right for me?

The ideal solution when dealing with gaps, holes or cracks in the wall is that you simply add the filler before sanding it down for a smooth finish. You just need to make sure that you have the right product to use. Your options include:


This type of filler is convenient to use, but is more of a quick fix solution as it’s not suitable for deep holes because it tends to shrink whilst drying out.


Once mixed with water, the powder sets really quickly and is perfect for filling deep holes around the home.


An easy to use, ready-mixed filler. This is a good option for medium-sized holes.


An acrylic mastic which is often used as a sealant. It fills gaps between skirting boards, doorframes and the wall.

Wood filler

Choose between ready-mixed and “two part” when dealing with holes in wood. The latter has a strong smell but sets hard quickly and is perfect for most big jobs.


Cheap and easy to sand, this is the economical choice for walls and often used when repairing a new home or large surface.

What should I know before starting to seal or fill?

Firstly, you should always read the manufacturer’s instructions before beginning any work or project because the advice can change from product to product. Then, try to ensure that the work area is well ventilated to help get rid of any fumes, and attend to the surfaces to ensure they are prepared.

Whenever you’re working with sealants and fillers you want to make sure that the area you are fixing is clean, with no dust and, most importantly, dry. Once you have completed the task, you will need to check the setting times and take into account that this can change slightly depending on the season and temperature.

Top Tip

Use a Fugi Kit to easily remove old silicone and profile the new seal for a smart finish.

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