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).
How to Seal Grout. Two Methods: Using Liquid Grout Sealer Using Aerosol Grout Sealers Community Q&A. Penetrating grout sealers help prevent staining and prevent grease from seeping into the grout, while other non-penetrating grout sealers form a barrier to protect the grout from water and stains.