Pre-Cleanup moldy basement framing Guide to Use of Fungicidal Sealants, Biocides, Sanitizers
Used on Building Surfaces or Carpeting

  • FUNGICIDAL SPRAY & SEALANT USE GUIDE - CONTENTS: Use of biocides, sanitizers, fungicidal sealants and Anti-Mold Coatings to Kill Mold or Prevent Mold Growth; Mold spray paints, mold prevention by painting? Spraying carpeting with a sanitizer.
  • POST a QUESTION or READ FAQs about using biocides or sanitizers - fungicidal sprays after a mold cleanup or building flood or sewer backup
  • References

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How to use mold sprays:

This article discusses the best use of fungicidal sealants, biocides, fungicides, sanitizers, and mold paints or sealants to seal remaining free dust and to retard future mold growth.

We discuss the pros and cons of using fungicidal sealants and bleach on wood surfaces and give sources and list types of those products. We also discuss common errors made when cleaning wood surfaces, such as relying on bleach or performing expensive and unnecessary cleaning on cosmetic black mold on wood surfaces.

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3. TREAT & SEAL - cleaned building surfaces such as lumber or plywood - an optional step to reduce retard future mold growth

Spraying Anabec biocide on an interior carpet (C) Daniel Friedman & Anabec

Article contents:

Our page top photo shows fungicidal paint sprayed on demolition debris in a building. The debris should have been removed before this sealant was applied.

At above left the worker is spraying a sanitizer or biocide onto interior carpeting in a building. Optionally, you may elect to treat cleaned lumber by coating its surfaces with a sealant intended for that purpose and following the recommendations of the manufacturer. This article series explains how to clean off or remove toxic or allergenic or even just cosmetic mold found on surfaces of un-finished wooden building materials such as framing lumber (rafters, floor joists, wall studs), and building roof, wall, and floor sheathing such as plywood, tongue-and groove pine boards, and other structural wood surfaces in buildings.

Applying Fungicidal Sealants after Mold Remediation

Photograph of sub microscopic debris and fiberglass insulation fragments encapsulated by a fungicidal sealant

The mold remediator/cleaner may elect to apply a fungicidal sealant such as Fosters™ 4020 or 4051, the Anabec™ two-step cleaner-sealer system, or non-sealant fungicides may be applied in an effort to reduce the chances of future mold growth on the cleaned surfaces.

But readers should review the advantages and warnings about using fungicides and fungicidal sealants described next.

The photograph shown here was taken in our forensic lab during examination of a mold remediation clearance dust sample.

The photo shows how a clear fungicidal encapsulant (mold sealant) can encompass and immobilize small particles, in this case fragments of fiberglass insulation and sub-micron microscopic debris which were coagulated and encapsulated into now-solidified droplets of a clear commercial mold encapsulant/sealant.

ADVANTAGES - of applying a fungicidal sealant to retard future mold growth

Photograph of clear fungicidal sealant on building framing and subflooring

This photograph, taken during a mold remediation clearance inspection, shows the use of a clear fungicidal sealant applied to previously-cleaned building framing and subflooring. The shiny coating makes evident where the coating has been applied.

The transparent nature of the coating permits the inspector, building owner, or a subsequent buyer of the property to view the quality of the cleaning job. Clear encapsulants have this advantage of showing the condition of the coated surface, assuring us that the mold remediator didn't simply "spray-over" a dirty moldy surface.

On the other hand, white or pigmented fungicidal paints and sprays are easier to detect, and it's easier to see if the application missed any surfaces that were supposed to be coated.

Good mold cleanup job (C) Daniel FriedmanOur photo (left) shows a moldy crawl space after expert cleaning, application of a clear fungicidal sealant on wood surfaces, and installation of a secure plastic barrier over a dirt and gravel crawl space floor.

Here are some advantages of using a fungicidal sealant following mold remediation

WARNINGS - about using fungicidal sealants to control mold growth

Mold spray applied after cleanup (C) Daniel Friedman

Our photo (left) shows a white fungicidal sealant paint spray coating that has been applied to all surfaces in a building basement fas the last step in a mold cleanup project. The remediator did a great job of removing moldy materials, cleaning all surfaces, and leaving no demolition dust or debris in the building - all before this mold spray paint was applied.

Mold Remediation Products, Fungicidal Sprays, Sealants, Biocides, Washes


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