[papereater]

People,

Restoring historic home, old window sashes from 1910. New putty applied to rabbets. Waiting for putty to "skin over" a bit, before applying primer. Do you prefer to use oil primer or water based? I am tending to go with the oil as it seems more compatable with the linseed oil based putty, right? Opinions appreciated.

 

[stick\shift]

I use oil based primer and latex paint on wood. If the wood is newer and has knots, shellac based primer may be in order.

 

[mark sr]

The correct way to glaze and paint windows is to oil prime [linseed oil also works] the bare wood, glaze when dry, let the glazing set for 24 hrs, prime with oil and then finish with latex once the primer is dry.


You could get by with using a latex primer but you might need to give the glazing longer to dry.

 

[papereater]

Thanks, people. yes, i did prime with oil before glazing. So, I will use oil primer for sure. I dont trust water base- just my suspicion. Sarco says for historic and look use oil, not water base, but again, their opinion. Anyway, thanks for the opinions.

 

[Kemper100]

I use oil based primer and latex paint on wood. If the wood is newer and has knots, shellac based primer may be in order.

I'm not a painter but I thought you never paint over oil based paint with latex paint.

 

[stick\shift]

I didn't say oil based paint, I said oil based primer. This is done all the time.

 

[mark sr]

Oil base primer is often the preferred primer on wood and is normally top coated with latex. Oil primer seals better while latex generally withstands the elements better.

 

[JohnWL]

People,

Restoring historic home, old window sashes from 1910. New putty applied to rabbets. Waiting for putty to "skin over" a bit, before applying primer. Do you prefer to use oil primer or water based? I am tending to go with the oil as it seems more compatable with the linseed oil based putty, right? Opinions appreciated.

Sarco states “Do not prime the putty”. You might consider checking with Sarco on that.

Linseed oil putty can be painted with pure linseed oil paint immediately after puttying. The linseed oil in the paint will crosslink with the linseed oil in the putty, forming a permanent molecular bond.

With acrylics or alkyd oil paints, the putty should be firm enough so that the brush doesn’t deform the putty.

 

[mark sr]

You won't find many linseed oil based paints these days. Linseed is prone to mildew. I've never had any issues with an oil base primer not adhering long term to glazing.

 

[JohnWL]

You won't find many linseed oil based paints these days. Linseed is prone to mildew. I've never had any issues with an oil base primer not adhering long term to glazing.

I stopped using linseed oil paint in the 80’s. Allback makes a good linseed oil paint.

Purified linseed oil with protein food sources removed doesn’t promote mildew growth.

Higher solvent content in alkyd oil primers can result in wrinkling over fresh linseed oil putty.

 

[papereater]

All good info, people. Yes, I did check with the main tech at Sarco. He said best to use oil based primer AND oil based paint, especially for exterior (still wanted to ask here for opinions). Thats what they do at sites like The Alamo, West Point, the White House, etc.

I am convinced that places like Oak Alley, and Nottoway also use oil paint, but have no evidence. Anyway, even if the Alamo did not use Sarco/oil paint I probably will because with the restoration of stuck window sashes one wants the 2 windows to slide up/down the track without sticking and nothing sticks more like latex semi gloss- doors, coffee cups on shelves, etc. Who needs sticking windows from rubberized (latex) paint.

 

[mark sr]

While it's somewhat dependent on your climate - generally latex house paint is best. Here in the southeast exterior oil base paints don't hold up as well as a quality latex house paint and oil generally gets mildew quicker than latex.