I used to say if Home Depot didn't carry it, it didn't exist. Well, this is the only gallon of vapor barrier primer in this part of the world, and it didn't come from Home Depot. Home Depot Canada does not carry vapor barrier primer. The Home Depot staff doesn't even know it exists. But I had to have it, so I could try it and write about it, so after using the Home Depot phone and yellow pages, I drove across town to the ICI paint store. I wouldn't have purchased more anyway, because at $30 a gallon, it would have cost too much, and also because at 100 g/L, it doesn't qualify as a low-VOC product (VOC = volatile organic compound, something undesirable if you're trying to be green). The product that I bought in quantity, and which cost 1/10th of the price – ICI's Speedwall 8130 Interior Latex Sealer – has a maximum VOC of 41.92 g/L. The maximum acceptable VOC level for this kind of paint product is 65. Sometimes you have to compromise.