Posts Tagged ‘oil based’

KILZ Stain Blocker to Cover Green Ink

October 26, 2019


See the green vertical line to the right of the paint can? The previous wallpaper installer probably had a little white wall showing at a seam, so used ink that matched the color of the wallpaper to disguise it.

Ink (along with other substances, like blood, rust, water stains, oil, tobacco, mildew, wood sap, and others) can bleed through joint compound, paint, and wallpaper. Sometimes it takes a few months or years.

So it’s important to discover these stains, and to treat them with a stain-blocking sealer. Water-borne products simply don’t work, no matter what the label claims. Shellac-based sealers like BIN are good. But I like KILZ Original, the oil-based version.

20+ Year Old Paper – Still Perfect

July 31, 2019


I hung this paper in a master bathroom in Bellaire more than 20 years ago. It is still in perfect shape!

This is due partly to the good quality paper the homeowner chose (not low-end, pre-pasted, paper-backed, solid vinyl), to good ventilation removing humidity from the room, to good installation techniques, and to the great primer I used at that time – Oil Based KILZ Original. Unfortunately, EPA regulations forced changes to this primer, and wallpaper paste will no longer stick to it.

The homeowners are going to renovate and update the bathroom, so I was there taking measurements for the new room. When it comes time to remove this old paper, I know that it will strip off easily and cleanly, because of the installation and primer used when it was put up.

Replacing One Wall

April 13, 2019

I hung this sunburst medallion wallpaper in an entry in west Meyerland a year or two ago. Originally, there was a doorway in the middle of this wall that led into the adjoining room. The homeowners had the doorway closed off, and the opening was replaced with a new piece of Sheetrock. This needed to be covered with wallpaper.

New wallpaper could not be patched in, and the damaged areas along the wainscoting could not be readhered, so new paper had to be bought to cover the entire wall – as well as a section over the entry door.

The second and third photos show where the contractor had pulled the paper away from the wall. As you can see, it took some of the primer and the paint below it, too. I wish I knew what the contractor did to have this result, because when I stripped off the rest of the wallpaper, it came off easily and left the wall surface below it perfectly intact.

I suspect that he just yanked the paper, or possibly used heat or some weird chemical. The proper way to strip off wallpaper is to wet it, then separate the top, inked layer from the bottom, substrate layer, and pull the top layer gently off the wall. Then you take a sponge and bucket of water and wet the backing. Once that water reactivates the paste, the paper backing will come away from the wall easily and with little-to-no damage to the wall.

I also suspect that this paper was hung over KILZ Original oil-based primer, which was a superb primer because it stuck tight and because it was not affected or reactivated by the water used to soak the wallpaper backing. Unfortunately, the formula for that product changed due to EPA regulations, and wallpaper paste will no longer stick to it. These days, I’m using two alternative primers – both water-based, and I am curious to see how they hold up when wallpaper is stripped off them.

Back to today’s job … Once I got the paper off, I used joint compound (“mud”) to smooth over the uneven areas between the contractor’s stripping job and mine, then sanded smooth, wiped free of dust, primed, and then hung the new paper.

The wallpaper pattern is by Thibaut, and is called Bahia. It’s a non-woven product, and is designed to strip off the wall easily and in one piece when it’s time to redecorate. As you can see, neither the contractor nor I had success with that. The tried and true separate-the-layers-and-saturate-the-backing-with-water method was the solution.

Wall Prep – Missing Chair Rail and Stain Repair

March 31, 2019


What an unexpected surprise I got when I arrived at work to discover that the chair rail in this entry had been removed (top photo). Not only did I need to figure how to get enough paper to cover the additional wallspace, but I needed to smooth over the damaged wall area where the molding had been torn off. (See previous post)
I skim-floated the wall and sanded smooth. It looked great. But brown coloring from the torn Sheetrock had worked its way through the smoothing compound (second photo). Torn drywall is not something that I would normally worry about bleeding through wallpaper (you are concerned mostly with things like grease, ink, water, tobacco, rust, and the like), but this stuff was 60 years old, so who knows what its properties and characteristics were back then? And besides, it had already worked its way through a layer of joint compound – in just one night! No sense in taking the chance that it might bleed through this nearly-white grasscloth natural fiber wallpaper.

The Gardz penetrating primer / sealer (not pictured) I planned to use on the wall would be fine to hang wallpaper on, but could not guarantee that that brown stain would not work its way through the primer and through the wallpaper.

I applied the Gardz, because it’s a great penetrating substance that seals new smoothing compound, and also provides a good surface for hanging wallpaper on. Once that was dry, I followed that with a coat of KILZ Original, an excellent oil-base stain-blocker. But wallpaper paste will not stick to the new KILZ formula (required in order to comply with current EPA requirements.

A little 3″ width around the lower center of the room with wallpaper not sticking tightly to it probably would not be problematic. But you never know, and I didn’t want a “hula hoop” of delaminated wallpaper circling the room. So once the KILZ was dry, I followed up with a coat of a wallpaper-specific primer, Romans Ultra Prime Pro 977.

Now the room is ready for wallpaper, without fear of a band of tan bleeding through the new surface.

Stripping Off What I Hung 20+ Years Ago

February 12, 2019


I hung this viny pattern back in the early 2000’s in dining room in the West U neighborhood of Houston. Now that it’s time for a change, I got to strip off what I had hung 20 years ago.

I was amazed at how easy it was, and at how there was NO damage to the walls.

The paper came away from the wall when I simply pulled it dry, but I was afraid of doing damage to the walls, especially at the seams. (When wallpaper dries, or over time with fluctuations in temperature and humidity, wallpaper can put stress on the seams, which can cause layers inside the wall to delaminate and come apart.)

To lessen the chance of putting stress on the seams, I used a sponge to put water on the surface of the paper. Because it was paper (not vinyl), water was able to penetrate, and reactivate the paste that was holding the paper to the wall. I made many trips around the room, soaking the paper each time. The more water that was able to soak into the paper, the softer the paste became, and the easier it was to pull the paper away from the wall.

Usually, the inked top layer of paper separates from the paper backing, and then you sponge water onto the backing layer, which reactivates the paste and then it comes away pretty easily. But in this case, the top and backing layers stayed together, and came off in one intact piece. This virtually never happens.

Note that I am pulling down, and not away from the wall. Pulling downwards minimizes stress on the wall. And I am pulling slowly and gently – not yanking.

What’s better – there was absolutely NO damage to the walls. Not one bit of primer pulled away from the surface, not one seam gave way, nothing to patch.

Why? Because when I prepped these walls 20 years ago, I did a proper job. I skim floated the textured walls to smooth them, removed all residual dust with a damp sponge, then primed with oil-based KILZ Original – great stuff, for many reasons. It holds tightly to the surface, it won’t rewet when water is sponged on the surface, it’s strong enough to resist double-cutting (strokes with a razor blade), it dries thin and smooth, and much more.

I wish I could still use KILZ Original. It was a superior primer for wallpaper (as well as stain-blocker). Unfortunately, EPA regulations have required manufacturers to make changes to their product, and wallpaper paste will no longer adhere to it.

I’m using alternatives now, and am pleased with the results. …Although I have not had experience stripping paper off these new products, so time will tell about that.

But these photographs of my experiences yesterday show what a superlative product the original KILZ Original was, and how important it is to take the time to prep a wall properly before hanging wallpaper.

Loose Wallpaper; Wall Layers Delaminating

November 15, 2018


Look closely between the seam of the wallpaper in the top photo. You can see little crumbly things. In the second photo, the issue is even more pronounced.

This is in the upstairs bathroom of a 1950 house in central Houston. Over time, compounded by humidity, poor air circulation, poor air conditioning / heating, and possible influences from the outdoors, various layers inside the wall have let loose of one another.

What are these layers? Originally the walls were probably painted with oil-based paint. Over the years, layers of latex paint, gloss paint, joint compound, and etc. were piled on, probably without proper prep between coats.

Some of these materials are not compatible with one another, and, over time and with stressers like humidity, they can let go of one another.

If just the wallpaper has come loose, as in the second photo, it can be pasted and readhered. But when the wall itself is coming apart, there is no fix, other than to scrap everything down to the original drywall (huge mess) or go over everything with 1/4″ drywall.

In this case, the homeowner had me repaste the few loose areas of paper, and then chose to live with the other visible cracks, chalking it up to an old house full of character and quirks.

Ink Spots Bleed Through Wallpaper

July 8, 2018


Well, this has been a month of issues with stains on walls! I was smoothing these textured walls with joint compound, and noticed some red splotches on the paint. I studied them, but decided they were paint, which is stable and not a problem. But a little after I had skimmed over the spots, I looked again and noticed that the red color had bled through.

Evidently it was ink, or lipstick, or child’s crayon, or some other such substance. Along with rust, blood, water, oil, mold and mildew, and a few others, these materials will bleed through paint and wallpaper. It might not happen right away, but eventually you will notice stains on the paper.

These stains can be sealed with a stain-blocker. I like oil-based KILZ Original, but the shellac-based BIN primer is good, too. Water-borne sealers may be environmentally-friendly, but I don’t trust them to work as well.

But in this case, I preferred to just get rid of the questionable areas. I took a knife and dug out the part of the wall that had the red spots. Those are the chips I am holding in my hand. Then I skim-floated over the area to smooth it, and proceeded with my wall prep and wallpaper installation.

No more red spots showed their faces. 🙂

Wallpaper on a Window Valance

June 12, 2018


I hung a beautiful grasscloth in the West U. living room of this empty-nester couple a month ago. They were putting the room back together, including hanging the curtains. This window valance had been covered with padded fabric which matched the drapes. Since the drapes are being changed, the valance no longer worked. The couple thought that the valance would look better covered in the same material as the walls.

So … I brought the valance home, along with some left over wallpaper scraps, and covered it.

The photo is deceptive – the thing is about 7′-8′ long. At first I thought I could take it to work with me and do it while I was waiting for primer to dry, for instance. But it’s way too big and loppy to haul into someone else’s home and, would, of course, take more time than anticipated.

So it sat in my garage for a couple of weeks, until I finally found a spare moment (three hours, actually) to pull out my tools, set up my table, get out the measuring tape, and slap some paste on that puppy.

The homeowner had removed the upholstery and the padding, and hammered the staples down as flat as possible. Then I sealed the wood with oil-based KILZ Original stain blocker, to prevent any wood sap from bleeding through the wallpaper. Since wallpaper paste won’t stick to most oil-based products I followed that with a coat of wallpaper primer (Ultra Prime, Pro 977 by Roman’s). On the driveway under the June Houston sun, that didn’t take long to dry. 🙂

Then some careful measuring to get panels of equal width, pasting, and applying the grasscloth to the wooden frame. I used a special “super glue for wallpaper” (clear silicone caulk 🙂 ) for the edges, to be sure the grasscloth would be able to grip on to the uneven and rough wooden surfaces.

I was pleased with the way it turned out. And I know the homeowners will be happy to get the valance up on the wall, their curtains up, and their room put back together and ready to enjoy.

Mildew, Bleach, KILZ

June 7, 2018


Whooah! I stripped off wallpaper from this wall around a window in a home that had some water damage from Hurricane Harvey, to find this black powdery stuff – mildew. You don’t want to put wallpaper over a wall that has mildew, because the black stuff will continue to grow. And because it’s chalky / powdery, it the wallpaper will not stick to it. And it will also work its way through the wallpaper and create a stain on the surface.

I use bleach to kill the mildew and remove it from the wall. Once dry, I use KILZ Original oil-based stain blocker to seal the surface. In this case, I also skim-coated the wall, to make it nice and smooth. I will follow that with a coat of Gardz, a penetrating sealer that is also a good product to hang wallpaper on.

Repairing Water Stains from Flooding During Hurricane Harvey

May 2, 2018


This home in Bellaire (Houston) received damage from flooding during Hurricane Harvey in August 2017. Water stains appeared on a small area of the wallpaper just above the baseboard in this powder room. Luckily, the homeowners had saved the paper left over from the original install, so I had material to use for the repair.

Certain substances, like grease, blood, smoke, rust, ink, tobacco, and water stains will bleed through wallpaper (and also paint and other materials, too). To prevent this, the discolorations must be treated with a stain-blocking sealer. Many of these are shellac-based, such as BIN, made by Zinsser, but there are others. I prefer oil-based KILZ Original (2nd photo).

I could have just cut some wallpaper and slapped it on top of the stain. But I wanted to be sure these flood survivors wouldn’t have to look at water stains again. So I used KILZ to cover the stains (3rd photo).

The next week, I came back to do the patch. Using my self-healing craft cutting mat with angles and measurements to trim on, along with a straightedge and razor blade, I cut appliqués to paste on top of the stained paper.

It wasn’t quite as simple as it sounds, because the wallpaper had to be hand-trimmed (use a razor blade to trim off the unprinted selvedge edge). And pasting the paper causes it to absorb moisture and expand, which can throw off the pattern match. So I was dealing with factors relative to what the other guy did and the products he used, compared to my own techniques and products / paste.

It took two tries, but with careful trimming and a little touch-up paint, the job turned out great (last photo).

I also used paint to cover some stains at the top of the baseboard, and also re-pasted some loose areas in other parts of the room (no picture).