Allow the second coat to dry 1 hour before sanding lightly and applying a finish coat. Brush Application – For best results, use a natural bristle brush. Apply the sealer to the surface using long and even strokes, brushing back into the wet material to maintain a wet edge.
We recommend no more than 1-2 coats, then finish with 1-2 coats of topcoat.
Sanding sealer always must be sanded down smooth after it has dried. Sanding sealer helps improve the condition of subsequent coats of paint or clear finish by sealing the wood pores.
Finish sand between coats with a fine-grade (220-320) foam sanding pad or 400-grit sandpaper to improve smoothness and adhesion.
Ingestion May cause nausea, headache, dizziness and intoxication. Skin contact This product is rapidly absorbed through the skin and may cause symptoms similar to those of ingestion. Repeated exposure may cause skin dryness or cracking. Eye contact Causes serious eye damage.
Regular readers will know that we do not recommend over-thinning the Cellulose Sanding Sealer; it's a common myth that it needs to be thinned 50/50 to work better, but as a general rule this is incorrect.
A sanding sealer must be applied after the stain but before the finish coat because otherwise it would prevent the stain from penetrating.
Michael Dresdner: "Sanding sealer is never mandatory. It is an option that saves time and material in some situations, and is unnecessary in others. Some woods, like cedar, spruce, and poplar, are so porous that they tend to suck up the first few coats of sprayed lacquer as if nothing were applied.
On bare wood, the first coat will dry to the touch in 5-10 minutes and can be sanded or recoated in 20-30 minutes. Subsequent coats or coats applied over existing finishes will dry to the touch in 10-15 minutes and can be sanded or recoated in 1 hour.
Thinning: Mix Sanding Sealer SS-501 with Lacquer Thinner at a rate of 1:1 (equal parts). Brush: Use a good quality nylon or polyester brush. Roller: Use a Lanco® All Purpose 3/8” Nap Roller PA-566. Roller application may require special care to prevent bubbling.
Using 2 coats of sanding sealer creates an even smoother finish. Sanding sealers fill and raise the wood grain, creating a rough, gritty feel.
Interior Oil-Based Sanding Sealer will dry to touch in 2 to 3 hours and can be sanded after 3 hours or when sanding sealer is thoroughly dry. Using a cleaning solvent, such as paint thinner or mineral spirits, is recommended for cleanup.
The thin viscosity makes it easy to spread and allows it to penetrate into porous woods. To start apply 1 thin coat and allow it to dry. Lightly scuff sand to remove any raised grain fibers, then apply an additional 1 to 2 coats to seal wood and provide an excellent surface that will be ready to topcoat.
Expert Tips For an Extra Smooth Finish:
A sanding sealer is not the same as a wood conditioner. Whereas a wood conditioner is a pre-stain treatment that reduces blotchiness when staining, a sanding sealer is applied only to bare wood that is not going to be stained.
These back marks are called metallic discoloration, or iron stains, caused by elemental iron reacting with phenolic chemicals in the wood, forming black iron tannates. Iron stains require the presence of iron, water, and wood and will not occur if one of these elements is absent.
It's a good idea to do this fine sanding between coats anyway to remove dust nibs. But polyurethane doesn't bond so well over finishes marketed as sealers, especially over sanding sealer. This sealer is good for use under non-polyurethane varnishes because regular alkyd varnishes gum up sandpaper.
Interior Oil-Based Sanding Sealer will dry to touch in 2 to 3 hours and can be sanded after 3 hours or when sanding sealer is thoroughly dry. Using a cleaning solvent, such as paint thinner or mineral spirits, is recommended for cleanup.
The main difference between an undercoat, sealer, and primer is that primers are applied to a new surface, while sealers are used as either the substitute to a primer or they are applied before the primer. An undercoat is typically used on a surface that has already been painted.
Wood dust becomes a potential health problem when wood particles from processes such as sanding and cutting become airborne. Breathing these particles may cause allergic respiratory symptoms, mucosal and non-allergic respiratory symptoms, and cancer.
Minwax® Professional Formula Sanding Sealer is a clear sealer formulated for application over bare wood. Its quick dry feature allows for sealing and topcoating your project in just one day.
To thoroughly wet sandpaper, many people suggest soaking it overnight in liquid. By doing so, the paper will not absorb any more moisture during the sanding procedure. If you can't soak the paper overnight, aim for at least 15 minutes of immersion before sanding.