Stain Blocker is General Finishes’s revolutionary water-based white primer for
interior projects. Stain Blocker can be used to protect pigmented finishes from
stain, dye and wood tannin bleed-through. Use over an existing finish, raw wood
or MDF as a base coat for light colored
General Finishes Milk Paint,
and Pigmented Polys.
General Finishes Stain Blocker is designed for effectiveness, not price point.
A successful primer requires a sophisticated resin system and an atypical formulation.
Use on pieces where you are concerned about bleed-through.
Please click the below headers to reveal the instructional info for this product.
See our general guide for spray tip sizes.
Keep your gun at a 90° angle, 6-8″ from the surface. On large, flat areas,
use wet, even patterns 6-8″ wide. For narrow surfaces, reduce the fan
pattern to 2-3″ wide to reduce overspray. Overlap each pass 25% to
conceal lines. Wear a full filter (NIOSH/MSHA approved) respiratory &
eye protection and work in a ventilated space.
cabinet face frames, edges or drawers with a brush, pad or small
cabinet-specific roller such as Whizz or AllPro brand.
50-70% humidity. Be sure to allow adequate dry time. You can tell if a water-based
finish is dry if it forms a powder when lightly sanded with a fine-grade (220-320)
foam sanding pad. If in doubt, wait longer. Rushing dry time can cause
clouding/blush in topcoat due to moisture trapped between coats. Increase dry time if:
- Humidity is over 80%
- Thick coats are applied
- Applying over a previously existing finish
- Applying over products from other brands
- Layering General Finishes water- and oil-based products:
- Water over oil: Let oil-based products dry 72+hrs before applying water-based products
- Oil over water: Let water-based products dry 24+hrs before applying oil-based products
Cure Time
Water-based finishes cure and harden for full use after 21 days in ideal
conditions. Avoid placing heavy objects on surfaces that have not completely
cured. Treat gently, and do not clean with commercial products during the
curing period.
What else you need to know:
- DO NOT tint Stain Blocker or mix with any paint, stain or topcoat. Contamination from other finishes will cause product failure.
- Interior use only under pigmented finishes.
- Stain Blocker does not adhere to melamine.
Warning: Do not use water-based products with Linseed Oils or Danish Oils.
General Finishes Extender
or General Finishes
Accelerator, with the exception of thinned General Finishes
Water Based Wood Stain.
- High Performance Satin + High Performance Gloss
- Snow White Milk Paint + Coastal Blue Milk Paint
- Amber Dye Stain + Merlot Dye Stain
The following product mixtures should NOT be stored:
- Any water based product with thinned tap water; water often contains
bacteria that will adversely affect stored paint. - Topcoat + Stain or Paint
- Milk Paint + Chalk Style Paint
- Water Based Wood Stain + Dye Stain