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  • Overview
  • Coverage Rate
  • Specs
  • Application

Synthetic Shellac Primer Epoxy Fortified | Stain Odor & Tanning Blocker | Anti-Microbial | Wood, Drywall, Stucco, Galvanized Metal

Synthentic Shellac is a high-performance stain, odor and tanning blocking epoxy fortified primer designed for a wide variety of uses and substrates. Our water-based shellac avoids the need for solvent cleaning of tools and hazardous odors during application. RainguardPro’s Shellac is epoxy fortified which dramatically increases performance compared to traditional shellacs while still remaining a water-based product for easy clean up and low odor applications.

Odors and stains are blocked out with a single coat. This low VOC product is ideal for interior and exterior use and resists the growth of mold, mildew, and microbes on the surface. Finishes and top-coats can be applied in as little as 40-minutes with good drying conditions and resists “hot” products such as lacquers and solvent-based topcoats.

Primer: For masonry surfaces, recommended Restore-N-Prep as pretreatment to properly clean the surface.

Topcoat: Most acrylic, latex and alkyd finishes and topcoats.


  • Interior & Exterior Wood
  • New or Painted Drywall
  • Stucco
  • Galvanized Metal
  • Alkyd Surface


  • Stops Tanin Bleed
  • Stain Blocker
  • Easy To Apply
  • Blocks Smoke and Water Damage
  • Resists Microbial Growth



Dependent on surface porosity and texture, up to 275 Square Feet Per Gallon

APPLICATION TEMPERATURE: 55°F (and rising) – 120°F with relative humidity no more than 80%

Technical Data
Material Type Epoxy
Solids by Volume 35%
Solids by Weight 50.6%
Color of Material Milky White
Odor Slight Latex Odor
ASTM D1653-13 Method A Permeability 1.19 Perm. @2 Mils DFT
V.O.C. 43 gm/L
Viscosity 94-98 KU
Weight ~ 11lbs./Gal
Surface Dry Time Approx. 40 Minutes @ 70°F
Recoat Dry Time Approx.  40 Minutes @ 70°F
Application Temp. 55°F-120°F


SCAQMD Meets Rule 1113 and 1107. Architectural Coatings. CARB Compliant
LEED 2009 and V4
Color Finish

Tint: 4oz / Gallon



Surface Preparation

Prior to application, all surfaces shall be clean and dry with no oils, dirt, debris, rust, metal oxides, or minerals such as efflorescence, lime, and calcium. These stains, along with others, will prevent proper adhesion of RainguardPro’s Shellac to sufficiently seal for the warranty period.

The use of Restore-N-Prep® Concrete and Masonry Cleaner system is recommended as a pretreatment to clean masonry surfaces. Once clean, allow the surface to fully dry before sealing or applying a topcoat (See the Restore-N-PrepTM TDS for details). If the surface needs to be sanded prior to application, do not use sandpaper above 180 grit so as not to cause adhesion issues.

We recommend not exceeding 180 grit sandpaper. Surface preparation exceeding 180 grit may work as a polish for the existing coating or substrate. If you are using too fine of a grit sandpaper that can affect adhesion. For fine finishes we recommend 150-180 grit sandpaper.

Application Instructions

RainguardPro’s Shellac is supplied Ready-to-Use. DO NOT THIN. Mix thoroughly prior to use. Avoid application in windy weather. In hot weather, lightly dampen surfaces with clean fresh water to avoid premature or flash drying.

Brush, roll or spray. Ambient and surface temperatures must be above 55°F and relative humidity below 80%. Clean tools and equipment with soap and water. Reach out to your Exterior Performance Coatings Representative with any application questions or instructions.

Mil Thickness
Wet 5-7
Dry 2-2.5


Dry Time
Touch 40 Minutes
Recoat 40 Minutes

Safe Handling

Use product only with adequate ventilation and/or an appropriate cartridge type respirator. Avoid contact with skin and wear protective gloves. Read the Safety Data Sheet before using.

Test Panel

Always apply RainguardPro’s Shellac onto a mock wall or test panel. Test the wall or an actual surface area to determine acceptable color, surface porosity, application rates and methods before starting general application.


NOTICE TO BUYER: DISCLAIMER OF WARRANTIES AND LIMITATIONS ON OUR LIABILITY We warrant that our products are manufactured to strict quality assurance specifications and that the information supplied by us is accurate to the best of our knowledge. Such information supplied about our products is not a representation or a warranty. It is supplied on the condition that you shall make your own tests to determine the suitability of our product for your particular purpose. Any use or application other than recommended herein is the sole responsibility of the user. Listed physical properties are typical and should not be construed as specifications. NO WARRANTY IS MADE, EXPRESSED OR IMPLIED, REGARDING SUCH OTHER INFORMATION, THE DATA ON WHICH IT IS BASED, OR THE RESULTS YOU WILL OBTAIN FROM ITS USE. N0 WARRANTY IS MADE, EXPRESSED OR IMPLIED, THAT OUR PRODUCT SHALL BE MERCHANTABLE OR THAT OUR PRODUCT SHALL BE FIT FOR ANY PARTICULAR PURPOSE. NO WARRANTY IS MADE THAT THE USE OF SUCH INFORMATION OR OUR PRODUCT WILL NOT INFRINGE UPON ANY PATENT. We shall have no liability for incidental or consequential damages, direct or indirect. Our liability is limited to the net selling price of our product or the replacement of our product, at our option. Acceptance of delivery of our product means that you have accepted the terms of this warranty whether or not purchase orders or other documents state terms that vary from this warranty. No representative is authorized to make any representation or warranty or assume any other liability on our behalf with any sale of our products. Our products contain chemicals that may CAUSE SERIOUS PHYSICAL INJURY. BEFORE USING, READ THE MATERIAL SAFETY DATA SHEET AND FOLLOW ALL PRECAUTIONS TO PREVENT BODILY HARM.