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Glazing putty - how long to let it set

Posted by graywings (My Page) on
Sun, Sep 18, 11 at 18:28

I was certain this question was asked and answered when I was reglazing months ago, but I can't find it. So . . . I reglazed my windows exactly two weeks ago using DAP 33. I can still make dents in the putty with my fingernail. Does that mean it's not ready yet for the top layer of primer?


Follow-Up Postings:

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RE: Glazing putty - how long to let it set

Dents are not a good indicator.

Does it have a solid surface film?

It is hard enough to paint.


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RE: Glazing putty - how long to let it set

Thanks for the response, brickeyee.

I guess it is ready to paint. The putty on the window I did yesterday is sticky, whereas I can run my fingers over the 2 week old putty.


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RE: Glazing putty - how long to let it set

"The putty on the window I did yesterday is sticky, whereas I can run my fingers over the 2 week old putty. "

That is about all you need.

It is actually preferred the putty NOT fully harden.

Once it does it starts to crack and not adhere to the glass from thermal expansion of the glass.


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RE: Glazing putty - how long to let it set

Once it "skins" over it is ready to paint, usually a day or 2. Be SURE you prime with an oil based primer as you should have BEFORE applying the glaze.


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RE: Glazing putty - how long to let it set

A day or 2? The DAP 33 container says 7-14 days depending on the temperature.

And yes, oil-based primer - the slow drying type.


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RE: Glazing putty - how long to let it set

"The DAP 33 container says 7-14 days depending on the temperature. "

It depends on how much work you want to go through to get the stuff to skin over.

If I have more than a single window I usually build a quick 'hot box' using a 100 W incandescent bulb for heat and some heavy plastic.


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RE: Glazing putty - how long to let it set

day or 2, week or 2, it depends on how much sun is hitting it and for how long


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RE: Glazing putty - how long to let it set

I'm just starting to reglaze my 1904 house windows. I'm using '33 but same question stream-- should I re hang the sash I puttied while it dries enough to paint? I've got a storm, so it's optional right now, but I've got MANY windows to do and can't imagine waiting 7-10 days to finally paint??

Also, are there any other brands people like in particular? I heard one bad thing about '33, but that's about it.


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RE: Glazing putty - how long to let it set

I invariably prime the entire sash before replacing the glass, so I have no need to prime again before the finish paint, which is gloss oil, The putty doesn't need priming when it has skinned.
Although I have never used it, I understand that Sarco putty beats the Dap 33 product in drying time, and I hope consistency. I always have to do something to a quart or gallon of the Dap product to get it fit for use, It's either too runny or too dry.
Casey


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RE: Glazing putty - how long to let it set

Here is an eleven-page thread about window putty:

Here is a link that might be useful: Putty Analysis


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RE: Glazing putty - how long to let it set

Put together a small hot box using plastic sheeting and a 100 W light bulb.


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RE: Glazing putty - how long to let it set

We reglazed 30 6 over 6 windows 11 years ago with DAP 33. 1.5 years ago we did another 23 six over six windows with the Sarco putty. We preferred the Sarco - much easier to use. The guy who sells it in small quantities is in NH so I got a small amount before committing to much more. We left the windows off until we painted them. We probably waited 2-3 weeks before painting.


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RE: Glazing putty - how long to let it set

Is a small room heated to 80 degrees the equivalent of a hot box?


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RE: Glazing putty - how long to let it set

80 degrees isn't going to do a lot. It can't hinder the drying; but it won't accelerate it a great amount. I kept newly-glazed wood sash in the back of my pickup (under the truck cap) in the sun for a week to get the putty to speed set. Days it would hit 135 in there.
Casey


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RE: Glazing putty - how long to let it set

I aim for around 100F to 120 F.

Part of the worry is shrinking the wood excessively and causing splits and cracks.


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RE: Glazing putty - how long to let it set

Have you ever tried a wood moisture meter to monitor your progress? I have no experience with these devices.


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RE: Glazing putty - how long to let it set

A moisture meter will not tell you anything useful about the putty hardening, the goal of the process.


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RE: Glazing putty - how long to let it set

I should have made it clear that I wondered if you had used a moisture meter to monitor the wood itself before repainting.


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RE: Glazing putty - how long to let it set

I've been reglazing the windows on the front of my house this week with dap 33. in a tub, not the tube of caulk stuff. takes a little while to get the hang of it, but it seems to go pretty good. I did the first window about 10 days ago, and it has set up enough to paint now.
of course it was 20% rain yesterday afternoon. which is usually nothing to worry about..but
as soon as I got the glazing points installed to hold the pane in place...rain.
what a pita. so tomorrow and saturday...I'll be back at it.
thanks for telling me about the dap 33 product. I really like it.
oh and inox..the wood of my windows was really really dry.
we have had a dry summer. levels of moisture didn't even register on my moisutre meter..(just fyi)


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RE: Glazing putty - how long to let it set

Have any of you tried Glaze-Ease 601, which can be painted in two hours, and is applied with a caulking gun?

Here is a link that might be useful: Glaze-Ease 601


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RE: Glazing putty - how long to let it set

Not used Glaze-Ease, but it would seem to me that applying with a caulking gun requires an extremely steady hand with it being difficult to control...putty just requires a knife to smooth it off for a nice looking finish.

I'd imagine it contains silicone to dry so fast...and doesn't that need replacing every ten years or so?


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RE: Glazing putty - how long to let it set

Glaze-Ease 601 is a blend of silicone and acrylic caulk. It is intended to remain elastic, and is expected to remain so for 40 years. There is a video at their site (linked above) showing application. Yes, the man is a caulking gun virtuoso.


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