Product #

A water-based penetrating sealer provides advanced stain and antimicrobial protection, while preserving the natural look of the surface.


Product Overview

STONETECH® Heavy Duty sealer is a water-based penetrating sealer that provides advanced stain and antimicrobial product protection, while preserving the natural look of the surface. It protects against oil and water-based stains on natural stone, tile, masonry, and grout in interior and exterior applications. It’s great for use as a granite sealer, tile sealer and more! 

Built with Microban® antimicrobial protection, STONETECH Heavy Duty Sealer continuously inhibits the growth of stain and odor causing bacteria, mold and mildew on surfaces. A safer alternative to high VOC solvent based sealers that is better for you and the environment and comes with a 25 year product satisfaction guarantee.


Features & Benefits

  • Offers advanced stain protection against oil and water based stains
  • Built with Microban® antimicrobial technology -Continuously inhibits the growth of bacteria, mold and mildew on the sealed surface
  • Breathable, penetrating, natural look sealer preserves the original look of the surface 
  • Water-based formula - Better for you and the environment
  • Low odor, non-flammable and weather resistant - For interior and exterior use
  • VOC compliant
  • Professional grade for quality protection every time

Product Specifications


Product # ST309-XXXX
Patent #(s)
Available Colors
Part of System LATICRETE®
Country Availability Canada, United States
Substrates Bluestone, Flagstone, Granite, Grout, Limestone, Marble, Quartzite, Saltillo, Sandstone, Slate, Travertine
Packaging Summary


  • ST309-1202: 2oz (59ML) Sample Bottle - 12 / case, NOT For Resale
  • ST309-1216: Pint /16oz (473ML) Bottle - 12 / case 
  • ST309-0624: 24oz (709ML) Spray Bottle - 6 / case
  • ST309-0632: Quart /32oz (946ML) Bottle - 6 / case
  • ST309-0401: Gallon /128oz (3.8L) Bottle - 4 / case
  • ST309-0105: 5 Gallon (18.9L) Bottle - 1 unit 



  • ST352-1216: Pint /16oz (473ML) Bottle - 12 / case 
  • ST352-0632: Quart /32oz (946ML) Bottle - 6 / case
  • ST352-0401: Gallon /128oz (3.8L) Bottle - 4 / case
  • ST352-0105: 5 Gallon (18.9L) Bottle - 1 unit 

Available Warranties

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