Knotting Solution needed over old timber ?

[self builder 123]

Hi

I have some whitewood timber built in to the ceiling of my garage which has been there for several years.

I planned to prime, undercoat and paint the timber, when I realised that I may need to seal the knots first.

As the timber is so old and there is no sign of any resin do I need a knotting solution ?

Many thanks in advance.

 

[vibrobullit407]

I would always knot if they haven't been already. You could just use a shellac based primer like zinsser BIN or an aluminum primer as these will prime and knot.

 

[TheDec]

Unpainted timber often shows no sign of bleed from resin, it is only when sealed by paint that it offers itself to the surface. I would go with an alli primer here, just remember that the primer will raise the grain of the timber so you should lightly sand and dust off prior to the application of your finish coats.

Dec