Hi everyone,

I did some research and found these paints that are qualified as moisture / vapour barriers:

(The table shows the grams of VOC per litre, Brand, Model #, and coverage.)

• under 50g/l — Kelly-Moore — 95-500TDS – 250-300sqft-gal – <1 perm
• 73 g/l — Miller Paint — Vapor-Lok Moisture Vapor Barrier Primer #1545 325-375 sqft-gal – <1 perm
• 74 g/l — Sherwin-Williams — INTERIOR LATEX MOISTURE VAPOR BARRIER B72W1 – 200-250sqft-gal – <1 perm
• 85 g/l — ICI Glidden PREP & PRIMEâ„¢ VAPOR BARRIER – 400sqft-gal – – 0.6 perm – my pick based on VOC, coverage, and national availability (assumed)
• 99g/l — Rodda (Cloverdale) — pds507901 – 230-270 sqft gal – 0.68-0.42 perm depending on thickness (1 coat) / 0.55-0.3 perm depending on thickness (2 coats)
• 99g/l — Cloverdale — 507901 10-0135 – 230-270 sqft gal – see Rodda for perm ratings
• 107g/l — Benjamin-Moore — 20110228 260 TDS US OKF – 450sqft-gal – 0.5 Perm

MPI VOC Ranges (grams/L) E3 <51 g/l E2 51 – 100 g/l E1 101 – 150 g/l E2 and E3 are generally considered “Environmentally Friendly” GPS-1 meets the MPI Green Performanceâ„¢ Standard GPS-1-08 GPS-2 meets the MPI Green Performanceâ„¢ Standard GPS-2-08 Via “Master Painters Institute” Paint Specifier’s List: “MPI # 61 Primer Sealer, Low Permeability, Latex, Interior A white pigmented, latex-based primer-sealer intended for use on new interior plaster, concrete and wallboard surfaces that are to be subsequently painted with latex or alkyd finish coats. Materials conforming to this standard will retard the transmission of moisture vapor through the coated substrate. This coating is not intended for use on wood.” http://www.specifypaint.com/apl/paintinfo_apl/MpiNumber.asp?ID=61000 Also, here’s a “Jon Eakes” article about the vapour barrier paints: http://joneakes.com/jons-fixit-database/1614-Vapour-barrier-paint-it-does-exist-it-does-work Looks like I’ll be buying some ICI Glidden PREP & PRIME to use instead of 6-mil poly on my project. Cheers! Danny