Zinsser Sealcoat

Zinsser SealCoat™ is a professional-grade, clear shellac-based sanding sealer for all interior wood surfaces. It penetrates deeply into the grain, enhances the natural tone of the timber, and dries lightning fast – ready to sand or recoat in just 20–30 minutes.

Compatible with all clear finishes, including solvent-based and water-based polyurethanes, lacquers and varnishes, SealCoat is perfect for floors, doors, furniture, cabinets and trim. It also works as a pre-stain conditioner, preventing blotchiness in softwoods like pine and fir, or as an odour-sealing barrier on wood and chipboard.

SealCoat won't yellow over time and gives a rich, warm basecoat that enhances the beauty and clarity of subsequent clear finishes.

Surface Preparation

• Ensure wood is clean, dry, smooth and free from grease or wax

• Sand bare wood thoroughly and remove all sanding dust

• Remove wax with methylated spirits

• Previously finished wood must be clean and well adhered

• Let wood stains fully dry before applying

Technical Data

Type: 100% dewaxed shellac-based sanding sealer
Finish: Clear (non-yellowing)
Sizes Available: 1L
Coverage: ~24–50m² per litre (depending on method & surface)
Touch Dry: 10 minutes (on sealed wood), 20–30 minutes (bare wood)
Recoatable: After 20–45 minutes
Application Methods: Brush (natural bristle), cloth/wipe-on, spray
Odour Barrier: Apply 2 full coats to seal wood/chipboard odours
Pre-Stain Conditioner: Thin 2 parts SealCoat with 3 parts methylated spirits
VOC: ~730 g/L (solvent-based)
Storage: 4–27°C, avoid temps >35°C
Shelf Life: 3 years unopened

Directions for Use

1. Stir well before use. Do not over-thin unless pre-staining (see below)

2. Apply evenly with brush, cloth or spray – do not overwork the surface

3. Allow to dry 20–45 minutes before sanding with 120–220 grit

4. Apply 1–2 coats for best results – sand lightly between coats

5. When used as a pre-stain conditioner, thin 2:3 with methylated spirits

6. For floors, apply with a brush or applicator along the grain, keeping a wet edge

7. Clean tools with methylated spirits immediately after use

Data Sheets

Zinsser Sealcoat - TDS

Zinsser Sealcoat - MSDS