TSSPro700 Sealant Prevents Black Mold on Stone Surfaces
Posted on August 10, 2025 by TSS Pro Sealants
TSSPro700 Sealant Prevents Black Mold on Stone Surfaces
TSSPro700 Sealant prevents black mold growth on stone surfaces with a powerful biocide that delivers up to 10 years of protection. Unlike many sealers that simply block water, this advanced solvent-based penetrating sealer contains a specially engineered biocide that stops black mold and mildew from taking root. While it does not target green algae, its performance against black growth is exceptional. Contractors and homeowners alike consider it one of the most effective long-term mold-prevention solutions on the market, making it ideal for pool decks, patios, and outdoor kitchens where dark growth often becomes a problem.

The TSSPro 700 is one of many quality options when you’re looking for long-lasting protection.
Key Points
- Penetrating solvent-based sealer with added biocide.
- Specifically prevents black mold and mildew growth.
- Biocide lifespan of approximately 10 years.
- Maintains natural appearance of stone without altering color.
- Provides strong water repellency alongside biocide protection.
- Easy reapplication without stripping.
TSSPro700 Technical Overview
| Feature | Details |
| Product Type | Penetrating sealer with biocide |
| Mold Protection | Prevents black mold and mildew (not green algae) |
| Biocide Lifespan | ~10 years |
| Appearance Change | None, natural look maintained |
| Base | Solvent-based |
| Longevity | Long-lasting, reapplication without stripping |
| Best Uses | Pool decks, patios, outdoor kitchens, shady areas |
Why TSSPro700 Sealant Stands Out
Outdoor stone surfaces are constantly exposed to moisture and organic matter, which creates the perfect breeding ground for black mold and mildew. Once it takes hold, black mold can stain stone, compromise its appearance, and even cause health concerns if spores spread. Most penetrating sealers do a great job of blocking water, but few directly address the problem of mold growth.
TSSPro700 is different. Its formulation includes a biocide that actively prevents black mold and mildew from forming. With an approximate 10-year lifespan, this biocide continues working long after typical sealers have faded, making it one of the most reliable mold-prevention solutions available today.
Best Applications for TSSPro700
This sealer is especially effective in areas where black mold is a persistent issue, including:
- Pool decks and coping where water is constantly present.
- Patios in shaded or damp environments prone to mold growth.
- Outdoor kitchens and living areas where grease, moisture, and spills can encourage staining.
- Stone walkways and courtyards in humid climates.
Because TSSPro700 penetrates into the stone rather than forming a surface film, it leaves the natural beauty of the material intact. Homeowners appreciate that their stone looks unchanged while gaining a powerful layer of mold protection.
Application Tips for TSSPro700 Sealant
- Apply only to clean, dry stone between 55°F and 90°F.
- Ensure all mold or mildew is removed prior to sealing.
- Use a brush, roller, or sprayer for even application.
- For very porous stone, a second coat may be necessary if absorption is quick.
- Allow 24 hours to cure before heavy use.
Contractor Feedback on TSSPro700
Professionals frequently call the biocide in TSSPro700 Sealant “awesome” for its reliability and long-term results. While some sealers protect against moisture alone, this product actively targets black mold, which is one of the most common homeowner complaints. Its long lifespan makes it a cost-effective solution, especially for high-end outdoor spaces that require both beauty and durability.
FAQs About TSSPro700 Sealant
- Does TSSPro700 prevent all types of mold and algae?
No, it is specifically designed to prevent black mold and mildew, not green algae or other growths. - How long does the biocide last?
The biocide has a lifespan of around 10 years, far exceeding most typical mold-prevention products. - Will TSSPro700 change the color of my stone?
No, it maintains the natural look of the stone without enhancement. - Can it be reapplied without stripping the old sealer?
Yes, like all solvent-based TSSPro sealers, it can be reapplied directly. - Where is TSSPro700 most effective?
On surfaces prone to black mold growth, especially pool decks, patios, and shaded areas in humid climates.

Clear Surface Sealer
Takeaway
TSSPro700 is one of the most powerful mold-prevention sealers available today. With a biocide that stops black mold growth for up to 10 years, it goes beyond traditional moisture repellency to offer targeted protection. This makes it ideal for pool decks, patios, outdoor kitchens, and any stone surface in humid or shaded environments. If you want your stone to stay beautiful, mold-free, and low-maintenance, TSSPro700 from TSSPro Sealants is the clear choice for long-term performance and peace of mind.
