Gaps

·        Narrow

Narrow gaps are best treated with acrylic filler. This is a flexible filler available from good DIY stores, many of which sell them under their own brand names. White is the most commonly used since it is easily overpainted with either oil or water based paints.

The most cost-effective filler comes in a hard plastic tube with a nozzle at the end and is applied using an applicator-gun device.

·        Wider

Wider gaps can be fixed by either using a high-grab acrylic filler such as Geocel Fixer Mate™ to provide the initial fill and then normal acrylic filler spread over it.

If you don’t have a high-grab filler you can achieve the same result by packing tinfoil into the gap and applying normal acrylic filler over it. Either method will result in the gap disappearing.

Filler will keep on coming out of the nozzle for some time after you have finished with it due to the build-up of pressure. This means that you need to be careful where you put it down as you may find it has dripped onto a surface it shouldn’t have! If this happens let it harden and then pick it off rather than trying to remove it while soft as it will only spread.