302 2r 32 8 1 introduction 8 2 communication between architect and engineer 8 3 floor covering technical resources 8 4 floor adhesives and.
Shellacking floor retarder.
Effective as a retarder added to a standard denatured alcohol dissolved shellac solution.
Naturally all other things being equal the more retarder that is added to the mix the greater will be the delay of the set.
Use a cloth to shellac wood if you re covering a large surface area and choose a brush for the job to finish tight edges and corners.
Include a plastic sheet test which really is as simple as it sounds in your timeline so that you know the slab is truly cured and ready for the.
Make sure the polyurethane will coat it sufficiently but more often than not doing a very light screen sanding of the laminate 220 grit sandpaper will be required first.
Add just enough shellac retarder to enable easy application or flow out add only what is necessary and don t exceed 15 20 by volume when spraying shellac the retarder will help eliminate over spray and orange peel.
At perimeter walls the vapor retarder should extend upward along the wall at an elevation of at least 6 inches above the top of the floor and be secured with tape creating the edges of the.
You don t want a vapor barrier on the inside it s creating a problem that can never be 100 fixed.
Keep in mind use of the retarder will require longer drying times between the coats of shellac.
302 2r 28 7 1 introduction 7 2 vapor retarder barrier location 7 3 vapor transmission through retarder barrier chapter 8 floor covering materials p.
A good rule of thumb.
It s a very disagreeable smell but used in small amounts it s not too bad.
Martin and chris if the floor is going to be a vapor barrier fair enough.
Planning ahead and installing a 10 mil reinforced moisture vapor barrier film before the slab is poured is a great first step toward avoiding eventual moisture issues in your epoxy flooring.
They lower the water cement ratio only as a side effect.
But then you may ultimately have problems even with the spray foam as you are creating a vapor barrier sandwich and the foam will leak air.
Just remember don t use retarders in cold weather.
Retarders are primarily intended to counteract the harmful results of heat on the concrete mix.
An isomeric form of butanol is added to behlen s bekhol shellac solvent the best solvent for shellac flakes for most purposes is denatured alcohol.
