C2 Sandable Acrylic Primer (SAP) — Ultra-Smooth Base for Cabinets, Trim & MDF

Plain-English overview: This is a fast-drying, water-based sandable primer made to build a smooth, even surface on woodwork and furniture. It fills minor grain, sands to a powder, and helps your finish coat lay down glass-smooth—perfect for cabinets, trim, doors, and MDF.

Why choose it

• Sands super smooth: powders when sanded for a pro, factory-like base.
• Levels & hides: evens out grain, pores, and minor repairs for uniform color and sheen.
• Fast turnaround: dries quickly so you can sand and recoat the same day.
• Low odor, low VOC: comfortable to use indoors; soap-and-water cleanup.
• Brush, roll, or spray: forgiving application with excellent adhesion for finish coats.

Best uses

• Before any use of C2 Cabinet & Trim for ultra smooth extreme durability
• Kitchen & bath cabinets, built-ins, doors, trim, wainscoting, and furniture.
• MDF panels and edges (great for sealing fuzzy edges before paint).
• Previously painted woodwork that needs a smoother, more uniform base.

Coverage & key specs

• Covers: ~350–450 sq ft per gallon (actual coverage varies with surface and method).
• Dry time: Touch-dry in about 30–60 minutes; sand/recoat in ~1–3 hours under normal conditions.
• Sheen: Flat, designed for sanding and topcoat adhesion.
• Application temp: Apply when air/surface/product are above 50°F (10°C). Protect from freezing.
• Cleanup: Warm, soapy water.
• Interior use only.

How to apply (step-by-step)

1. Prep the surface: Clean off grease and wax. Fill defects, let dry, then sand smooth. Scuff-sand glossy or previously painted areas; remove all dust (vacuum + tack cloth).
2. Stir or shake well - do not thin. Strain if spraying.
3. First coat: Brush with a quality synthetic brush, roll with a thin nap microfiber/foam roller, or spray. Apply an even, properly loaded coat; avoid overspreading.
4. Sand: When dry, sand lightly with 220–320 grit until the surface powders and feels uniformly smooth. Remove dust.
5. Second coat (optional): Apply a second coat for maximum smoothness or on porous MDF edges; sand again as above.
6. Topcoat: Finish with your preferred C2 interior paint or C2 Cabinet & Trim for a durable, enamel-like finish.

Pro tips

• Use a raking (side) light to spot surface flaws before top coating.
• MDF edges are thirsty. Prime, sand, and re-prime edges for the best result.
• Avoid heavy build on profiles and edges; multiple thin coats sand flatter and cure better.
• For severe stains (water, tannin, smoke), spot-prime first with a dedicated stain blocker before SAP.

FAQs

What’s the difference between this and Wallboard Primer?

Wallboard Primer seals new drywall. SAP is a sandable build primer that levels woodwork and MDF for an ultra-smooth finish on cabinets, trim, doors, and furniture.

How many coats do I need?

Most projects look great with 1–2 coats. Add a second coat (with light sanding) for the smoothest, factory-like base—especially on MDF edges and open-grain woods.

Can I use it on MDF?

Yes—SAP is excellent on MDF. Prime, sand to a powder, and re-prime edges as needed before topcoating.

Does it block stains?

It evens porosity and provides a smooth base but is not a heavy-duty stain blocker. Spot-prime severe stains with a dedicated stain-blocking primer first.

Is it OK under water-based or oil-based paints?

Yes—once fully dry, SAP can be topcoated with most quality interior finishes. Always test on a small area when using specialty coatings.