Choose grout by the tile surface, joint width, location and maintenance instructions, not by a single label. LATICRETE's guide recommends its unsanded option for certain soft or polished surfaces at joints of 1/8 inch or less, while its sanded line covers other applications within stated product ranges. Its product guidance also treats sealing differently by grout type, so check the exact data sheet.
Grout affects the joint’s appearance, maintenance and installation work. Choose it after the tile and joint layout are known, then verify that the grout product is approved for the surface and application.
Compare grout families
| Type | What to compare | Buyer questions |
|---|---|---|
| Cementitious | Sanded and unsanded options, mix, joint range and any sealing instructions | Does the tile surface permit the aggregate, and what does the data sheet require for cure and maintenance? |
| Premixed | Product chemistry, allowed locations, cure conditions and cleanup window | Is the exact product approved for the room, exposure and grout-joint size? |
| Epoxy | Mixing components, chemical and stain claims, working time and cleanup | Can the installer work within the product’s timing and protect the tile from residue or scratching? |
These names cover different product lines. For example, LATICRETE lists cementitious, premixed and epoxy grout families with separate application ranges. Do not transfer a joint-width or wet-area approval from one product to another.
Match the joint to the tile
The tile maker’s edge, surface and installation instructions affect the grout choice. In its own guidance, LATICRETE recommends an unsanded product for certain soft marble, polished stone and soft glazed tile when the joint is 1/8 inch or less; its sanded products have their own stated joint ranges. Sanded grout can scratch some soft stone or glazed surfaces, so ask the installer to confirm the tile’s requirements before ordering.
Include maintenance and cleanup in the bid
LATICRETE says its cement-based grouts should cure for at least 72 hours at 70°F before using its named sealers, while its listed epoxy products do not require sealer. Those instructions are specific to its products. Compare the selected grout’s mixing, cleanup, cure, sealer and routine-cleaning requirements in the manufacturer’s current documents.
Grout and tile work in a shower depend on a complete compatible assembly. Compare porcelain and ceramic tile and shower waterproofing membranes, then review the contractor checklist before approving installation. Browse flooring guides.
Sources
Common questions
When should I use sanded or unsanded grout?
The tile and joint width matter. LATICRETE's recommendations use unsanded products for certain soft or polished surfaces at joints of 1/8 inch or less; follow the exact tile and grout instructions.
Does epoxy grout need to be sealed?
LATICRETE says its epoxy grouts do not require sealer, while its cement-based products have their own cure and sealing instructions. Check the selected manufacturer's data sheet.
Is epoxy grout right for every tile?
No. LATICRETE cautions that some polished or soft stone may scratch and recommends a test area for its epoxy grout. Match the grout to the tile and installation conditions.
Does grout make a shower waterproof?
Grout is part of the finished tile surface, not a substitute for the shower's waterproofing assembly. Follow the selected membrane, drain and tile-system instructions.