Stain Blocker

Never guarantee a finish on this era of furniture. Inform your customers of this issue and steer customers away from using light colors. Many mahogany pieces from the late 1920's to early 1930's have an aniline dye lacquer finish which can bleed through no matter how many times you paint or prime over it. Although ideal coverage over an aniline dye lacquer can never be guaranteed, the following two products have been known to minimize bleed through:

1. A stain blocking primer such as General Finishes Stain Blocker or Zinsser B-I-N
2. A shellac seal coat will usually stop most of the bleeding

Note: If you are trying to cover red mahogany with a white you may never be able to stop the bleed through. Stain Blocker is most likely to stop the bleed-through of all options listed above because it was specifically engineered to block the most persistent bleed-through.

Tips from GF:

1. Never guarantee a finish on this era of furniture. Inform your customers of this issue and steer customers away from using light colors.
2. Clean the project and apply 2 coats of General Finishes Stain Blocker with a brush, roller or by spraying. The first coat will absorb contaminants in the wood, causing a color change during the first application, and the second will seal the contaminants. More information regarding Stain Blocker here.
3. Another primer alternative is Zinsser B-I-N.
4. Use a dark paint color - there are some pieces that will never work with al light paint.
5. If none of this works, we recommend that you strip and refinish with a penetrating oil stain followed by a clear coat.

Stripping Recommendations:

1. Use a good quality citrus stripper or a soy gel stripper as they are more gentle than traditional chemical strippers.
2. Remove any remaining finish with 150 grit sandpaper.
3. Once you have removed the old finish, wash the piece down with a 50/50 blend of denatured alcohol and water to remove any residual oils and waxes.
4. Once these stages have been completed, it is safe to use any type of wood stain to restore the original look of the piece.

A primer is your best defense under light-colored paint.

Another technique to avoid the slight color change that sometimes occurs when applying topcoat is to add 10-15% of the paint you are using to your topcoat. This technique layers additional coats of color over your piece as well as providing the protection of a topcoat. If you don't like measuring, just add enough paint until you can see a bit of the hue in the topcoat. This method works with a brush or a spray gun.

To maintain the full-strength protection of the topcoat, DO NOT TINT YOUR FINAL COAT of topcoat.

Remember, NEVER EVER paint an existing piece of furniture with a light paint without proper preparation AND a stain blocking primer. Topcoats can activate tannins in the wood, or dyes in the previous finish, causing yellow or pink bleed-through. We recommend General Finishes Stain Blocker, which has been developed specifically for upcycling furniture and has proven to be 100% effective when two coats are applied, or Zinsser BIN.

Here is a sample finishing schedule:

1. Prep clean and sand
2. Three coats of paint (or four if needed)
3. Two coats of topcoat mixed with 10-15% paint
4. One coat of topcoat

VIDEO: How to update or refinish cabinets and woodwork light paint color using a sprayer.

Time and temperature play a roll in Stain Blocker's thickness and settling in the bottom of the can. What you are seeing is some of the fillers coagulating.

This is normal as long as it is soft on the bottom; it does not diminish its quality or effectiveness. You should be able to reincorporate the contents of the can - use a paint mixer if necessary because it is a thick, heavy product. However, you should not see any hard settle at the bottom of the can.

General Finishes offers water, oil, and maintenance finishes that meet the needs of homeowners, woodworkers, and DIY’ers. Comprehensive videos are available for each product on YouTube, plus dynamic comparison charts at GeneralFinishes.com/COMPARE.

All General Finishes water-based finishes are:

• VOC compliant in all 50 states
• Water cleanup 
• Low odor
• Non-flammable

INTERIOR PRIMERS

Water Based Stain Blocker is:

• An epoxy acrylic formulation.
• Prevents tannin bleed-through & discoloration.
• Has high build with excellent adhesion properties.
• Apply with a brush, roller, or sprayer.

WATER-BASED TOPCOATS & PIGMENTED FINISHES

High Performance Water-Based Topcoat is:

• An Interior polyurethane/acrylic blend.
• Clear drying.
• highly resistant to water and household chemicals.
• Apply with a brush or sprayer.

Flat Out Flat Water-Based Topcoat is:

• An interior acrylic formulation.
• Clear drying.
• provides an extremely flat finish with high durability.
• Apply with a brush or sprayer.

Enduro-Var II Water-Based Topcoat is:

• An interior oil-modified water-based urethane.
• Dries to a light, amber tone.
• Made with over 50% renewable resources.
• Apply with a brush or sprayer.

Water-Based Milk Paint is:

• A premium interior and exterior-rated acrylic formulation.
• Self-sealing and does not require topcoat.
• Is made with over 50% renewable resources.
• Is available in 12 popular colors, plus two tint bases.
• Apply with a brush, roller, or sprayer.

Water-Based Glaze Effects is:

• An interior oxidating acrylic formula.
• Available in 6 colors, including a Clear Base.
• Is a decorative specialty finish.
• Can be intermixed to create custom colors.
• It requires a topcoat
• Apply with a brush, roller, or sprayer

Pro Image Water-Based Flooring Topcoat is:

• An interior polyurethane.
• Clear drying.
• Levels to a smooth, hard, durable finish.
• Provides excellent slip and black heel mark resistance.
• Apply with a brush, roller, or pad applicator.

INTERIOR WATER-BASED STAINS

Water-Based Wood Stain is:

• Made with over 50% renewable resources.
• It’s available in 18 deep brilliant colors.
• And provides universal coverage on many wood species.
• Apply with a brush or sprayer.

Water-Based Pre-Stain Conditioner is:

• Used to control blotching on hard-to-stain woods.
• And to reduce Water Based Wood Stains.
• Apply with a brush or sprayer.

Water-Based Dye Stain is:

• A penetrating stain with ink-like consistency.
• It is available in 14 vibrant colors.
• And can be used as a toner.
• Apply with a brush or sprayer or wiping on.

Water-Based Dye Stain Reducer is:

• The clear base used to reduce Dye Stain colors.

WATER & OIL EXTERIOR FINISHES

Exterior 450 Clear Water-Based Topcoat is:

• A polyurethane formulation.
• Tintable to dark colors.
• Contains UV absorbers & Mildewcides to protect the finish.
• Clear drying.
• Apply with a brush or sprayer.

 450 White Water-Based Topcoat is: 

• A pigmented polyurethane formulation.
• Is tintable to light and pastel colors.
• Contains UV absorbers & mildewcides to protect the finish.
• Apply with a brush, roller, or sprayer.

Exterior 450 Water-Based Stain is:

• Made with over 50% renewable resources.
• Available in 10 colors, including a clear base.
• Contains U.V. absorbers & mildewcides to protect the finish.
• Apply with a brush or sprayer.

Water-Based Milk Paint is:

• A premium Interior and exterior-rated acrylic formulation.
• Self-sealing and does not require topcoat.
• Made with over 50% renewable resources.
• Available in 12 popular colors, plus two tint bases.
• Apply with a brush, roller or sprayer.

Outdoor Oil is:

• A penetrating oil wood preservative.
• Contains UV absorbers and mildewcides to protect the finish.
• This finish will amber as it ages.
• A maintenance product. Reapply when wear becomes evident.
• Apply with a brush, roller or sprayer.

INTERIOR OIL STAINS & AMBERING TOPCOATS

Gel Satin Oil-Based Topcoat is:

• A heavy-bodied, no-drip oil and urethane formula.
• Designed to provide a hand-rubbed look.
• Will amber as it ages.
• Apply with a brush or wipe on.

Gel Oil-Based Stain is:

• A heavy-bodied, no-drip formula.
• Available in 14 deep, rich, uniform colors.
• Apply with a brush, roller, or wipe on.

 Arm-R-Seal Oil-Based Topcoat is:

• A penetrating sealer with a high-quality urethane formulation.
• It provides long-lasting, durable protection.
• and works beautifully on projects with detail.
• This finish will amber as it ages
• Apply with a brush or wipe on.

Liquid Oil-Based Wood Stain is:

• a traditional, pigmented liquid wiping stain
• Available in 14 colors
• Can be used as a toner with Arm-R-Seal
• Apply with a brush or wipe on.

Oil-Based Pre-Stain Conditioner is:

• Designed to control blotching on hard-to-stain woods.
• And penetrates the grain to promote uniform acceptance of oil stains.
• Apply with a brush or wipe on.

Oil-Based Seal-A-Cell Clear is:

• Formulated with a blend of oils, urethanes, and wax.
• Is GF’s deepest penetrating close-to-the-wood sealer.
• And the best choice for highlighting figured wood.
• Apply with a brush or wipe on.

Hard Wax Oil is:

• A urethane-solids polymer in a blend of oil & wax.
• Enhances the natural look of wood.
• One of our easiest finishes to use.
• It’s best used with optional GF Hardener to shorten dry time and provide superior durability.
• This is a maintenance product. Reapply when wear becomes evident.
• Apply with a white pad or plastic spreader.

 Oil Based Wood Bowl Finish is:

• A pure urethane formulation.
• Highlights figured wood beautifully
• Apply with a brush or wipe on.

INTERIOR MAINTENANCE PRODUCTS

Butcher Block Oil is:

• A mineral oil formulation.
• Meets all requirements for use on wooden surfaces that come in contact with food.
• This is a maintenance product. Reapply when wear becomes evident.
• Apply with a cloth.

Orange Oil is:

• A routine cleaner for cured wood finishes
• Non-combustible with a fresh orange scent
• Apply with a cloth

Satin Finishing Wax is:

• A blend of waxes.
• Produces a soft sheen and feel over any wood finish.
• Can be used as a polish for rubbing out new finishes OR as a scratch-remover.
• Apply with a cloth.

No matter what your project is, General Finishes has the right product for you. General Finishes is dedicated to using the highest-quality ingredients in all our products, while testing and advancing our water-based finishes with leading-edge technology.

Learn more about GF’s products at Generalfinishes.com. 

General Finishes: We make tomorrow's finishes today.

Recommended for use on Interior/exterior wood applications such as raw wood, existing finishes, and MDF.

This is General Finishes' most advanced primer, and it is the most expensive. If bleed-through is NOT a concern, use one of our other physical primers: Enduro White Undercoat or Enduro Deep Base Primer.

Results and features you can expect include:

• Epoxy/acrylic 
• Bleed-through protection in a water-based system
• Improved sandability
• Enhanced adhesion with superior bonding
• It cannot be tinted or intermixed with other products.

Enduro Stain Blocker is General Finishes’ revolutionary chemical stain-blocking primer for professional, industrial, and homeowner applications. 

Stain blocking means stain blocking—there is no substitute for this primer. This chemical primer has a sophisticated resin system, an atypical formulation and is formulated for maximum effectiveness.  It provides the strongest, most protective chemical barrier on the market. Even with testing, there is no guarantee that stains will not display long after the project is complete, but it is your best insurance against tannin bleed-through and discoloration when painting raw wood surfaces or existing finishes in white or light colors.