TSS Prosealants is considered an essential business and operations will remain open. We are practicing social distancing during the COVID-19 outbreak.

TSSPRO 700—Clear Surface Sealer; Prevents Discoloring Black Algae


  • Prevents the growth of discoloring, ugly black algae and many mold and fungi (“microorganisms”) particularly on limestone and concrete; also effective on brick, masonry, stucco, grout, natural stone, tile, plaster, roofs and wood decks
  • Lasts for up to seven years, preserves the natural look and beauty it is applied on, salt-water resistant
  • Enhances property appeal – maintains and increases property value     
  • Solvent-based; harmless to humans and pets once cured, ready for foot traffic in 1-2 hours.
1 Quart Double Pack (2 bottles) $117.94
Single 1 Gallon Bottle $168.55
Single 5 Gallon Pail $703.48

Product Information

NOTE: One gallon of sealer can cover up to 200 square feet. This will depend on the porosity of the stone/surface as well as the application process.

NOTICE: This product is not VOC Compliant. Consumers in VOC regions CAN purchase only 1-quart bottles of this product. However, consumers in AZ (Maricopa County), CA, CT, DE, IL, IN, MA, MD, ME, NH, NJ, NY, OH, PA, RI, VA (Northern), VT, Washington, D.C., and Canada can NOT purchase 1-gallon and/or 5-gallon bottles of this product.

TSS700CS is a remarkable, breakthrough silicone sealant:

  • it stops discoloring algae, mold and fungi commonly found on concrete, brick, masonry, stucco, grout, stone, vinyl, tile, plaster, roofs and wood for years,
  • it is perfect for interior flooded drywall/sheetrock and wood,
  • it retards fire from spreading on combustible surfaces and
  • it prevents water entry – it is salt water proof
  • ClearSurface has undergone extensive antimicrobial and mold testing.

ClearSurface is extremely effective on ugly black and brown discoloring, the most commonly found issues particularly on limestone, however it may or may not be effective on some strains of green algae.

ClearSurface molecularly bonds to a substrate forming a seamless, durable barrier. Once cured the surface is harmless to humans and pets.

Features & Benefits

  • Preserves the natural look of the surface it is applied on; indoors or outdoors
  • Keeps surfaces free of discoloration caused by most molds, algae, and fungus
  • Fire retardant; will retard the spread of fire – does not release carbon dioxide
  • Reduces and eliminates mold and mildew odors where applied
  • Water resistant; provides dimensional stability
  • When applied on wood, resistant to rot and decay; brown and white mold, insects, many species of termites
  • Maintenance free
  • Lasts for years, not just months
  • Enhances property appeal; maintains and increases property value
  • Easy, one step application – fast curing, 30 minutes or less in most cases
  • Can be sprayed in air conditioning/heating vents
  • Once cured is harmless to humans and pets

TSSPRO 700CS seals and prevents black algae growth on outdoor surfaces by blocking out water and food access. Ideal as an outdoor limestone sealer, TSSPRO 700 also protects against black mold and mildew on other hard surfaces such as concrete driveways, retaining walls, and brick on the exterior of homes. This stone and concrete sealant keeps surfaces looking clean and new for years!

Sealant Highlights

  • Prevents Discoloration from Mold & Algae Growth
  • Creates a Waterproof Barrier
  • Seals out Saltwater (Saltwater Proof)
  • Ideal for Sealing Area Around Pool
  • Ideal for Natural Stone & Limestone
  • Cured Sealant is Safe for Pets & People

What is TSSPRO 700CS?

Our 700CS sealant is a solvent-borne silane, considered a VOC. Sealants made from solvent-borne silanes offer the best protecting against water, sealing out moisture with an impenetrable barrier of sealant. The silicon polymer prevents water impregnation in hard surfaces that can cause black algae. Initially the formula was intended specifically for sealing limestone, because limestone is tricky type of stone to seal because of it is so porous, needs a lot of oxygen, and other complicating matters.

After feedback from adventurous customers and our own testing we?re recommending it for many other surfaces as well.

What Can I Seal With the 700CS CLEARSURFACE Sealant?

TSSPRO 700CS has proven a very dynamic sealant, suitable for a variety of natural stone and man made applications. This sealant is also suitable for use both indoors and outdoors. You can use 700CS to prevent water penetration and algae growth on the following:

  • Flagstone: Arizona, Oklahoma, Santa Fe (Both Porous & Dense Types)
  • Limestone: Lueder?s, Oklahoma, Dolomite, Indiana
  • Sandstone
  • Travertine
  • Bluestone: Pennsylvania, Basalt
  • Slate
  • Coral
  • Soapstone
  • Drywall
  • Brick & Masonry (Unglazed Only)
  • Concrete
  • Grout
  • Wood
  • Vinyl
  • Quartzite
  • Moss Rock
  • River Rock
  • Stucco & Plaster
  • Saltillo Tile & Roof Shingles

Use TSSPRO 700CS to seal pool copings, the area surrounding a pool. This formula seals out water completely and is saltwater proof and chlorine proof: ideal for sealing pool decks and around hot tubs.