It works perfectly as a concrete expansion joint sealant.
Caulking where siding meets concrete.
Fill the crack with urethane caulk similar to what you would use for driveway caulk.
Use a smooth even motion filling the crack flush with the surface beveling it if it s against the house.
Good for gutters siding and concrete.
But if the joint is going to be buried behind other finish surfaces and the gap is 1 2 ish or bigger then squirt foam is a good choice.
A polyurethane caulk works best here but silicone will also do.
Best for use with aluminum metal concrete mortar plastics rubber stone vinyl and exterior wood.
But here the main problem is people usually don t find the right type of caulk for their works.
Many professionals like those at james hardie also agree that you should not use caulk on fiber cement siding unless there is no metal flashing underneath.
Mostly what kent said.
You need to have the best caulk for hardie siding to help your walls and wooden surfaces to get rid of open cracks and thin spaces between joints.
Concrete caulk this type of caulk should be used where concrete slabs meet or where they meet with a building.
I have a cement slab foundation and shiplap board siding attached diagonally.
Snip the opening of the tube at a 30 degree angle making the opening the same size as your gap.
There s a gap along the bottom edge of the siding where it meets the cement foundation about 4 off the ground.
In other words caulking is applied where moisture would otherwise penetrate and cause deterioration.
But urethane squirt foam is subject to uv degrada.
Urethane caulks are common but many pros prefer to use silicone caulk because it lasts longer and can be used with a variety of different materials.
Caulking this page is intended to be a supplement to your estimate document.
The best exterior caulk for roofing construction and repairs since it can withstand extreme temperatures and creates a strong insulating and water tight seal.
Flashing acts as a waterproofing layer for this type of siding and caulking will prevent the flashing from doing its job.
Caulking is a sealant that fills gaps cracks nail holes and similar imperfections on the surface.
Caulking around windows doors eaves and trim edges gives added insurance that leaks will not occur.
I d like to seal this to make the house more airtight and keep cold air out.
It depends on the exact situation.
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.
