What's the best mastic for sealing floorboards...

[ellal]

More specifically the gaps between the boards (non t&G) which vary from about 1mm to 4mm. They are newly sanded.

 

[TheDec]

Google "Draughtex" and see if this product will cure your problems.

Dec

 

[ellal]

looks interesting, but expensive!

 

[joe-90]

I find the best way is to use a circular saw to cut thin strips of varying width from a similar floorboard. Glue them in with PVA and then sand them back with a belt sander.

 

[joe-90]

duplicate

 

[ellal]

That's good for the bigger gaps Joe, but the smaller ones would be tricky to cut thin enough - well for me anyway!

 

[joe-90]

Try a frame sealant then. It is an acrylic that comes in varying shades.

 

[ellal]

Is acrylic better than silicone? - it will be applied after floor finish is applied.

 

[joe-90]

Better off applying acrylic before you finish the floor.

 

[ellal]

cheers