Plaster is a powder, typically gypsum-based, that you mix with water to create a paste. It hardens as it dries, making it useful for repairing, smoothing, or shaping surfaces.

On this page, you’ll see several types used for different jobs:

• Wall repair compounds: Patching plaster, spackling, and wall repair pastes for filling holes and cracks.
• Casting plasters: Plaster of Paris and pottery plaster for molds, crafts, and models.
• Specialty repair: Formulas designed for pool surfaces or exterior patches.

Choosing the right type depends on your project and surface. Always follow the product label for mix ratios, application, and drying guidance; results can vary based on conditions.

Names can vary by use and formula. On our site, products in this category may be labeled:

• Plaster of Paris or casting plaster for molds and crafts.
• Patching plaster for repairing walls and ceilings.
• Spackling compound, wall filler, or wall repair paste for small holes and dings.
• Pottery plaster for ceramics and slip casting.
• Basecoat plaster for building up or resurfacing sections.
• Pool plaster repair for minor pool surface touch-ups.

While these are related, the ingredients and intended uses differ. For the best results, check the label for interior or exterior rating, surface compatibility (drywall, plaster, masonry), and whether it’s a dry mix or ready-to-use.

Plaster is still widely used—it just fills different roles than drywall. Drywall is common for new walls, while plaster-based products shine in repairs, finishing, and crafts.

• Home repairs: Fill nail holes, patch cracks, or rebuild small sections of plaster walls.
• Finishing: Skim coats and textures to refine surfaces before paint.
• Crafts and molding: Create casts, models, and decorative elements with casting plasters.
• Specialty fixes: Address small pool surface blemishes with appropriate repair mixes.

Pick a product labeled for your surface and location (interior/exterior). Some wall repair pastes even include color-change indicators to signal dry time. Always follow instructions and safety guidance on the label; results may vary by temperature, humidity, and application.

Both work—your choice depends on the repair.

• Small holes and dents (nails, picture hooks): Lightweight spackling or wall repair paste is convenient, easy to sand, and often premixed.
• Larger or deeper repairs: Patching plaster or heavier repair compounds can build up more material and create a firm base.
• Surface type: Check labels for drywall vs. older plaster walls and for interior vs. exterior use.
• Dry time and sanding: Some pastes include dry-time indicators; cure times vary.

Review coverage and tool needs on the package. You can filter online for size and type, then choose pickup or delivery for what fits your project timeline.

Good storage can help keep leftovers usable, but shelf life varies by product and conditions.

• Ready-to-use pastes: Seal the lid tightly, wipe the rim clean, and store at room temperature. Avoid freezing or excessive heat.
• Dry mixes (powders): Keep sealed in a cool, dry place to prevent moisture clumps. Reseal bags or use airtight containers.
• Clean tools: Don’t dip wet or dirty tools into the container; contamination can shorten life.
• Label and check: Mark the open date and inspect texture before reuse.
• Disposal: Follow label directions and local guidelines; keep out of reach of children and pets.

Always refer to the product label for specific storage recommendations.