But you are correct that it is very difficult to paint.
Best caulk for hardie board siding.
For years quad caulking by lepage has been the standard hardie caulking in the edmonton market.
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.
So what i would tell you to do is to use a colored caulk to choose the caulk in the color of the siding.
Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.
What you want to use is a silicone caulk because it s the most permanent one.
This is chicago so the temperature and humidity extremes are pertty substantial.
Price is a lesser consideration than durability and latex paint holding ability.
You can use this sealant anywhere and on any kind of surface from cement to wood metal to plywood.
It s got good adhesion and expands and contracts.
Rubber adhesive sealant caulk by flex shot best caulk for hardie board and interior objects.
I m shopping around for suggestions on the hands down best paintable caulk for my new fiber cement siding job at both the plank butt joints and the plank trim intersections.
801 caulk 10 1 oz by dap best exterior caulk for hardiplank siding.
When james hardie siding products butt into wood based materials a 1 8 gap will allow for expansion and contraction of the wood based product.
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Caulking them is a mistake and the caulking is likely to fail prematurely.
All weather window door max shield by ge sealants and adhesive best caulking for hardie board siding in budget.
James hardie does not recommend the use of caulk at field butt joints.
This means that hardie contractors are used to overapplying their caulking and letting it shrink over time.
The dap 18110 acrylic latex caulk takes only half an hour to harden after which you can add any kind of paint or polish over it.
Hardy plank cannot be stained.