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Bio-Wash Stain Prep Mill Glaze Away

  • Bio-Wash Stain Prep Mill Glaze Away
0.60 LBS
Calculated at checkout

Product Description

Stain Prep™ - Mill Glaze Away™ will extend the life of a coating by stabilizing the pH and opening the pores of wood. Other acid or bleach based preparation products do not leave wood in the proper condition for waterborne coatings such as Natural Deck Oil™. Allows for new wood to be coated immediately.


Appearance: White Granular Powder
Specific Gravity:
Boiling Point: N/A
Freezing Point: N/A
Sizes: 250g
pH: 8 -9
VOC content: 0 g/L
Flash point: N/A
Viscosity: N/A
Shelf Life: 24 months
Coverage: up to 500 sq.ft./bag
(theoretical): 46 sq.m./bag

Features & Benefits

  • Cleans and prepares wood for coating
  • Quickly cleans dirt and water stains
  • Removes planer crush (Mill Glaze)
  • Conditions wood by washing away acid residue
  • Contains no bleach, TSP or caustic soda
  • Protects surface with a natural borate treatment
  • Biodegradable
  • Water rinse clean up
  • Easy to use
  • One 8.8 oz. bag (250 g) makes 2.5 gallons (9.5 L)
  • Will extend the life of any coating
  • Maximizes coating performance


Stain Prep™ has been proven to effectively prepare wood surfaces for coating by penetrating the wood and removing dirt and acid build-up.

This revolutionary product will enhance the life of any coating. Some applications include wood decks, fences, railings, siding, log homes, cedar shakes and gazebos.

Use on ALL new or old wood prior to staining or painting your surface.


Dissolve contents of one bag (8.8 oz. or 250 g )into 9 L or 2.5 gallons of warm water (above 27°C or 81°F).

Apply with mop, sponge, brush, roller or garden sprayer.Wait 5 to 15 minutes then agitate with a brush. Finally rinse well with water. Allow wood to be dry-to-touch before applying new coating.

Rinse wood in direction of grain using a garden hose or a 500 to 1200 psi pressure washer.


Up to 500 sq.ft. or 46 sq.m. (per bag depending on surface).


Stain Prep™ - Mill Glaze Away™ helps protects against wood rot, mold and mildew with a natural borate wood treatment.

Prewash with Stain Prep™ - Mill Glaze Away™ and coat with Natural Deck Oil™ before graying and weathering begin. Use Stain Prep™ - Mill Glaze Away™ on pressure treated lumber to condition the surface before painting or staining. If wood surface appears gray and weathered, use Woodwash™.

If wood needs heavy duty cleaning use Simple Wash™ then prepare wood with Stain Prep™ - Mill Glaze Away™.

WHAT IS MILL GLAZE? "Mill glaze" is a term used by the coatings industry to define the smooth glossy-like surface that develops on newly milled lumber.

This glossy surface or "mill glaze" is caused by planers and saw blades turning at extremely high speeds. The high temperature and pressure can literally polish the wood to a glaze-like condition. It is these shiny looking or mill glazed areas that prevent proper coating penetration and adhesion resulting in premature peeling and failure.

WHY USE STAIN PREP™? Use of Stain Prep™ - Mill Glaze Away™ will allow for immediate coating application with Natural Deck Oil™ without the need to allow wood to season. Standard practice has been to allow new wood to weather unprotected for up to 90 days.

This weathering process solves the problem of mill glaze through exposure of wood to sun and water. However, outdoor exposure to sunlight (ultraviolet radiation) and water can cause wood to discolour.


Dispose of remaining product in accordance with applicable environmental and government regulations.


Wear rubber gloves and eye protection. Avoid ingestion or contact with skin or eyes. Wear personal protective equipment.

When spraying wear NIOSH/MSHA approved respirator. Do not expose to bare metal.


Contains sodium borate decahydrate. Avoid contact with eyes. In case of contact with eyes flush with water for 15 minutes and get medical attention.

See Medical Safety Data Sheet for more health and safety information.

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