Can anyone recommend a paintable sealant (by brand name) for the end edges where Hardie lap siding butts against wood? Problem with OSI Quad is it takes 7 days to cure. I need something that will be ready to paint within at most a 5 day lift rental. Frankly I'm having trouble translating this into what to buy: For best results use an Elastomeric Joint Sealant complying with ASTM C920 Grade NS, Class 25 or higher or a Latex Joint Sealant complying with ASTM C834. Caulking/Sealant must be applied in accordance with the caulking/sealant manufacturer’s written instructions or ASTM C1193.