The most reliable way to cover a large gap is to use wood trim, and even though you can't nail it to the tile backsplash or the granite countertop, you can glue it. You want the trim to be as inconspicuous as possible, and wood quarter-round is usually the best choice.
Use an epoxy kit to fill in the space between the granite slabs on your bench. Mix the epoxy according to package directions and choose a color that matches your granite well so that it is less noticeable as it dries. Fill the seam carefully, then go back to the front and wipe off the excess.
ANSWER - You should use an ASTM C920 silicone sealant suitable for granite. Laticrete has a product called Latasil that comes in many colors.
Simply fill the gap with the appropriately sized backer rod in a way that leaves room for the caulk to be the visible break between the counter and the wall. Then caulk on top of the foam material. Use the caulk tool as before to even out the finished caulking.
Seams are sealed with an epoxy resin. To disguise the seam, your installation team will create a colored epoxy that matches the main tone of the countertops. They will take this color-matched epoxy and create a flat and even seam.
High Quality Caulk Products
The best caulk to use on granite is 100% silicone caulk. Your home may have latex caulk, which is not as durable and is prone to becoming discolored with use. Ceramic Tile and Stone Consultants suggests ASTM C920 silicone sealant as the best silicone caulk for granite countertops.
It's essential to use caulk where the backsplash meets the kitchen counter, as well as at the top and edges of the backsplash. This prevents water from seeping in between your tile and the wall or trickling in behind your countertop. Water that infiltrates your wall in this way can cause mold, rot, and damage.
A good seam should be completely flat and flush with the countertop and should seem inconspicuous, if not invisible. A poor fabricator will leave a bumpy, visible seam, which will greatly diminish the look of the overall countertop.
When installing a granite countertop, you'll often need to put in a seam. This will ensure that the granite will join together properly and give you that uniform look you want. A good seam shouldn't be noticeable. The sealant should be the same color as the granite and it should be in an inconspicuous place.
Ideally, you should place seams in well-supported areas, such as over a spot where two cabinet side walls meet. However, this could place a seam smack in the middle of a highly visible section of the surface. Often, seams are placed in corners, where less traffic and food prep occur.
ONLY WAY TO NOT HAVE SEAMS IN STONE COUNTERTOPS
If the cut can be done in a smaller than 10 foot slab, then you can have stone countertops without seams. If you need to install a sink, range or have larger kitchen space; there isn't anything you can do to prevent seams.
Latex caulk is a terrible option for kitchen and bathroom backsplashes. To create a long-lasting watertight barrier, always use silicone caulk. Pure, or 100 per cent, silicone is the best existing caulk for surfaces that will come into contact with water.
Caulk makes your surface airtight and watertight. Silicone sealants, on the other hand, remain flexible for years which make them ideal for areas that are prone to expansion and contraction. Silicone has strong binding properties that can be applied to almost any surface both indoors and outdoors.
Acrylic caulk works well for painting applications as it fills in any gaps between walls, ceilings, and woodwork trim. It cleans up well and provides a clean, neat seal. Silicone caulk, is often referred to as rubberized silicone caulk, remains flexible for most of its lifetime without peeling, cracking, or distorting.
Silicone is very flexible and acts as a water and moisture repellant, making it among the best caulks for both windows and bathrooms. It is more expensive than latex caulk, but it is highly durable.
Since a backsplash is a vertical surface, can you get away with leaving it unsealed? Here's your answer: if a homeowner is serious about maintaining their natural stone wall tile, then daily cleaning and two to three applications of sealer every year is a must.
The one spot where caulk, not grout, should be used is the seam between the countertop and the backsplash. The right material for that is a top-quality silicone caulk. The Tile Council of America suggests a 1/8-in. -wide caulk joint at the seam.
The short answer is no, but most of the time, traditional tile with grout can always use a layer of sealant. Epoxy grout doesn't need to be sealed, but any other format should have a sealant applied to keep your tiles and grout lines looking fresh and new.
Caulking should come after the often-messy grouting process. Although tile caulking manufacturers do not require caulking installation to be done before or after grouting is performed in a shower, caulking before grouting a shower has significant downsides.