Best Exterior Caulk For Hardie Siding

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.

Best exterior caulk for hardie siding.

Any lower and you might see a few nail heads poking through the bottom of the next board any higher and your siding is likely to be loose and. 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. James hardie does not recommend the use of caulk at field butt joints. Best caulk for fiber cement siding or hardiplank siding lets you have the perfect sealing your surface needs.

Caulking sealant must be applied in accordance with the caulking sealant manufacturerã ââs written. Big stretch acrylic latex caulking sealant by sashco. That is why we are showing you some other products for various surfaces along with our top pick. Sashco big stretch acrylic latex high performance caulking sealant.

If needed you ll also want to caulk or re caulk every seam and joint in your hardie plank. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur. Once all caulk is dry and your siding is clean you ll paint hardie plank with a high quality exterior grade acrylic latex. Dap 18275 dynaflex 230 is a 100 waterproof and paintable sealant for the exterior window siding door and trim etc.

Hardie plank siding has a nail line across the top of the board that is 1 down from the top and nails are supposed to fall between and 1 from the top of the board to give the best hold. This step will ensure that no moisture gets in at the joints and causes deterioration. This has been made in such a manner that it gives the best flexibility without cracking. Butyl rubber is sometimes recommended for exterior siding since it s a specialty outdoor caulk that can withstand changes in temperature and repeated exposure to the elements but you can choose any exterior caulk that will bond to your siding just make sure to read the labels and spot check on an unseen portion of your siding to make sure.

Best caulk for hardie siding reviews and buying guide august 24 2020 august 24 2020 by richard allen we may get commissions for purchases made through links in this post. The silicone tough latex formulation is what gives it an outstanding exterior performance.