Can this be used on concrete in a heavy traffic area?

This can be used on concrete surfaces in high foot traffic areas but should not be put under vehicular traffic.

My contractor used this along the top of my laminate countertop's backsplash where it meets ceramic tile on wall in the kitchen and my one complaint is that it is shiny - which makes it look like there is water sitting there - which is distracting and, in my opinion, detracts from the professional look it had before this was applied. Does your product come in a matte finish by any chance?

Unfortunately Laticrete does not offer a matte finish option for Latasil.

I have an shower that needs re caulking. What is recommended to prep before applying Laticrete Latisil sealant?

Preparation Clean all joints and surfaces to receive sealant, removing all foreign matter and contaminants such as grease, oil, dust, water, frost, surface dirt, old sealants and protective coatings. Metal, glass and plastic surfaces should be cleaned by mechanical or solvent procedures. Simple detergent or soap and water treatments are not acceptable. In all cases where utilized, solvents should be wiped on and off with clean, oil and lint free cloths. When using any solvent always follow solvent manufacturer’s safety, handling and installation recommendations.

Laticrete Latasil Caulk Colors 10.3 oz Sealant

Name: Laticrete Latasil Caulk Colors 10.3 oz Sealant Cartridge
Brand: Laticrete
SKU: 6201-Almond
Price: 22.21 USD
Availability: InStock

Laticrete Latasil 10.3 oz Sealant Cartridge

The Laticrete Latasil Sealant is a high performance silicone sealant designed for interior or exterior use in coves, corners, changes in plane and expansion joints in applications of stone, thin brick or manufactured stone masonry veneers. Ideal for wet area applications.

Common Uses

Exterior and interior use
Swimming pools and other wet applications
Joints for ceramic tile and stone applications
Expansion joints in residential and commercial applications

Advantages

Equipped with anti-microbial technology
Resistant to pool chemicals
Matches top 19 Laticrete grout colors and clear
Easy to smooth and tool
Excellent for masonry construction
Excellent movement capacity - 25% extension and compression
Can be used where ceramic tile abuts glass and window framing
Conforms to the following properties under ASTM C920: Type S, Grade NS, Class 25, Use NT, Use I, Use M, Use G. Conforms to ASTM C-794 Adhesion Properties
Works with the following substrates Stone, glass, metal/steel, ceramic tile, masonry surfaces, wood and plastic surfaces

Grout and Sealant Color Guidelines

Grouts, Caulks & Sealants, and Profiles & Trims Color Guidelines – Grouts, caulks & sealants, and profiles & trims color samples are guides only. LATICRETE does not warrant color matching to this color chart or to any color guide produced. Actual shade and texture will depend on job site conditions, lighting, installation techniques and types/color of tile or stone used, and may vary from this color chart, color kit and color swatch on product packaging. Verify actual appearance and compatibility with a test area before installing. Blend grouts with different control numbers. Follow ANSI A108.10/Materials and Methods Standards Association (MMSA) Bulletin #9. No claims for color shade variations will be honored.