Control arms hold front wheels, allowing up and down movement. of the front suspension. The control arm is an important part of the front suspension. It connects the steering knuckle (the part that holds the front wheel) to the vehicle's frame or body, see the photo.
Often, installers use grout in place of caulk for these reasons: 1  The caulk may not exactly match the grout color.  Even when the caulk exactly matches the grout color when installed, it may not match six months later (caulk will age differently from the grout).
Yes, you will need a grout sealer with nearly every type of grout. Because your grout is porous, it can absorb just about any thing that comes into contact with it until sealed. This is why it is so important to seal you grout right away and then keep on doing it regularly.