Best Exterior Caulk For Hardie Siding

If needed you ll also want to caulk or re caulk every seam and joint in your hardie plank.

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. 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. That is why we are showing you some other products for various surfaces along with our top pick. This has been made in such a manner that it gives the best flexibility without cracking.

Caulking sealant must be applied in accordance with the caulking sealant manufacturerã ââs written. Once all caulk is dry and your siding is clean you ll paint hardie plank with a high quality exterior grade acrylic latex. 1 i chose this caulk because it has 25 flexibility compared to silicone based caulk. 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. 2 house built before 2008 so has no flashing okay to caulk. 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.

Big stretch acrylic latex caulking sealant by sashco. Sashco big stretch acrylic latex high performance caulking sealant. 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. Best caulk for fiber cement siding or hardiplank siding lets you have the perfect sealing your surface needs.

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. Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.