
Originally Posted by
Ronf
I've been using DPLF for years (mainly DP50LF or DP90LF). When I first started using this PPG primer it had a 72 hour max window re-coat and that was with the DP402LF catalyst, I've never used the 401. I've also used it with and without the sealer. For the sealer, I always use their scale of G1 to G7 with the DAS products. The ONLY time I now use the sealer is for panel match IF the P sheet calls for it. As you may know the PPG sealers, like many sealers, have a wide variety of colors from white to dark gray, starting with their DAS3021 sealer which is white (G1) and shades in between that extend to their gray 3025 onto dark gray DAS3027 (G7). I've only had one problem and that was several years back when I was trying to match a fender and door to factory paint where the P sheet called for the white sealer (DAS3021). I had shot the bc over DP50LF without the white sealer and it came out a shade or 2 off, which could only be seen in the extreme daylight sun. For that fix I striped the panels back to steel, hit it again with DPLF primer, followed by the appropriate DAS sealer, bc, cc, etc. and the panels came out dead on. If I am shooting a full car or if the P sheet calls for a medium gray sealer, I no longer do a seal coat. I might add I mostly shoot the Deltron 2000 (DBC), only occasionally have I used the Omni.
I wouldn't push the re-coat window time with this product, just too many variables with heat and humidity. I admit to being a bit gun shy after PPG changed their DPLF re-coat window time from 3 to 7 days, just can't see taking the chance.