Caulking vs Filler

[Bahco]

Can any of you good guys tell me the difference between the two. When should they be used and are they more or less the same thing
Also I am glossing over varnished wood and finding it needs a few coats. Is there any good advice for white glossing and should I be undercoating first
Muchos Grazias

 

[TexMex]

Caulking and filler are both loose terms. Caulking generally means something that fills gaps and remains flexible. Filler means something that Fills things (like gaps).

So, for instance, Polyfiller, could be described as a filler, but not as caulking (cos it sets hard). Rope soaked in Tar could be described as caulking, but I've never heard it described as a filler. Silicone? you tell me.

If I were painting gloss over varnish, I'd be inclined to sand back to bare wood and use a primer. If I were you and you knew me though, I wouldn't listen to me. Better to wait for someone that knows about these things.

 

[david and julie]

Filler(polyfiller etc) generally sets hard and can be sanded smooth, it is therefore best on walls or wood etc which are being painted or papered.

Caulk is used for flexible filling where you get movement or expansion, such as around windows, stair stringers,corners of skirtings etc. It is also overpaintable.

Silicon is for around sinks/ baths/tiles etc. It is waterproof/flexible but you can't paint it. (properly that is)

I agree with Tex about the varnish. To save time you can use water or acylic based primer/undercoat. This will dry quicker without the smell. However it is pretty naff for the top coats. Solvent based paints are more durable and have a nicer finish and will go over the above OK.

 

[Bahco]

Much obliged to you both

 

[lauren_haney]

just one little thing that might help.
if you use the caulk then make sure it completley dry before painting it.
i tried doing it fast once and painting before it was dry any it didnt cover well.was like trying to paint over plastic.