DAP Weatherproof Patching Compound, White 32 oz, Sandable and Paintable

DAP Weatherproof Patching Compound is a white, 32 oz (907 g) acrylic latex exterior filler for patching and finishing surfaces exposed to the weather.

• WeatherMax Technology — formulated for long-lasting protection in areas exposed to the elements.
• Hydrophobic, waterproof surface — resists swelling, softening, blistering and breakdown.
• Adheres to porous and non-porous materials — supports repairs across a range of exterior surfaces.
• Sandable and paintable — lets you finish the patch to suit the surrounding surface.
• Withstands rain within 24 hours once fully cured — helps plan exterior repair work.

Exterior gaps and damaged areas need a filler made for more than occasional indoor conditions. This compound is designed for installation, finishing and repair work where surfaces face ongoing exposure to the elements, including exterior trim and siding. Its weather and UV protection is formulated to help prevent discoloration, cracking and crumbling.

What exterior repairs is this compound made for?

DAP Weatherproof Patching Compound is made for installing, finishing and repairing exterior materials, including siding, trim and masonry. WeatherMax Technology is formulated for areas with continuous exposure to the elements, making it suitable for outdoor patching where weather resistance matters. The compound also provides UV protection to help maintain the repaired area.

• For fiber cement siding, PVC trim board and vinyl siding.
• Also suitable for metal, composite, concrete, brick and wood.
• Designed for both porous and non-porous materials.

How does the patch resist weather?

The acrylic latex formula creates a tough, hydrophobic surface for a waterproof repair. That surface is designed not to swell, soften, blister or break down, while weatherproof protection helps prevent discoloration, cracking and crumbling. These properties make the compound suited to repairs on areas that remain exposed to outdoor conditions.

• Weatherproof and UV protection for exterior applications.
• Hydrophobic surface helps resist water-related damage.

Can I sand, paint or expose the repair to rain?

Yes. The compound is sandable and paintable, so the finished patch can be prepared for painting. Once fully cured, it can withstand rain within 24 hours. This timing is useful when planning a repair on a surface exposed to changing weather.

• Sand the cured repair as needed before finishing.
• Paintable surface for a finished exterior repair.
• Rain resistance within 24 hours after full cure.

DAP Weatherproof Patching Compound suits exterior repair and finishing projects involving siding, trim, masonry, wood, metal and other compatible materials. It is especially relevant where a patch needs to handle ongoing exposure to the elements and can be sanded and painted as part of the finish. Its acrylic latex formula, hydrophobic repair surface and broad material adhesion make it a practical choice for outdoor patching work.