The Miracle Sealants GRSHNI2 Grout Shield Additive promises to enhance grout quality by improving color consistency, water resistance, and strength. It replaces water in the grout mixture, potentially saving time and money by eliminating the need for additional sealing.

Users have reported mixed experiences with this product. Some found it effective in strengthening tile grout and appreciated the convenience of not needing a separate sealer. However, others noted no significant difference in performance compared to standard grouting methods.

A recurring issue among reviewers is the product's shelf life and packaging. Several customers received containers that were either half-full or contained expired product with large clumps, leading to dissatisfaction and concerns about deliberate misrepresentation.

Despite these drawbacks, when fresh and properly packaged, the additive performs as advertised, offering improved compressive strength and color consistency. It's crucial for buyers to verify the manufacturing date before purchase to ensure product efficacy.