"............Caulking:
A high quality, paintable caulk is recommended. For best results, use caulks that comply with either ASTM C 834 or ASTM C 920. Caulking should be applied in accordance with caulking manufacturers' written instructions. (Leave 1/8" gap at trim for caulk. Caulking at butt joints is optional.)
Painting:
James Hardie products must be painted. For best results, install Hardiplank siding with our exclusive Prime Plus™ factory priming system and a 100% acrylic topcoat(s)*. If our Prime Plus™ factory priming is not being used, Hardie recommends the application of an alkali-resistent primer along with 100% acrylic topcoat(s). (For paint manufacturer's paint specifications, refer to JH Technical Bulletin No. S-100.)
*Note: Please refer to paint manufacturer's specifications for application rates......"
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