Best Caulk For Hardie Board Siding

Bottom of siding boards should not be caulked water is meant to exit through the bottom of each board.

Best caulk for hardie board siding.

You can use this sealant anywhere and on any kind of surface from cement to wood metal to plywood. 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. For best results use an elastomeric joint sealant complying with astm c920 grade ns class 25 or. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.

It s got good adhesion and expands and contracts. Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Price is a lesser consideration than durability and latex paint holding ability. But you are correct that it is very difficult to paint.

What you want to use is a silicone caulk because it s the most permanent one. Rubber adhesive sealant caulk by flex shot best caulk for hardie board and interior objects. 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. This means that hardie contractors are used to overapplying their caulking and letting it shrink over time.

Caulking them is a mistake and the caulking is likely to fail prematurely. This is chicago so the temperature and humidity extremes are pertty substantial. So what i would tell you to do is to use a colored caulk to choose the caulk in the color of the siding. 801 caulk 10 1 oz by dap best exterior caulk for hardiplank siding.

Quad caulking is uv resistant and flexible and when it cures it shrinks about 30. James hardie does not recommend the use of caulk at field butt joints. For years quad caulking by lepage has been the standard hardie caulking in the edmonton market. 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.

While paint does tend to somewhat glue these pieces together caulking them is never advised and can cause permanent damage.