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Zinsser GARDZ Problem Surface Sealer
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At a Glance
Quick Decision Guide
Size
Quart
Coverage
87.5-112.5 Sq. Ft.
Color
Clear
Formula
Water-Based Acrylic
Application
Interior
High pH Compatibility
Up to 12.5
Dry Appearance
Water Clear
Ready to Use
Yes
Why Choose This Product
Key Benefits
Deep Penetration
Seals and stabilizes porous problem surfaces
Damaged Drywall Repair
Seals torn facing paper and helps prevent bubbling during repairs
Adhesive Sealing
Seals residual wallpaper paste before applying water-based finishes
Texture Stabilization
Hardens soft or crumbly texture and popcorn finishes
Moisture Resistance
Dries to a hard, moisture-resistant protective film
High pH Compatibility
Suitable for surfaces with a pH up to 12.5
Product Information
Product Details
Specifications
Brand
Zinsser®
Part Number
02304
UPC
047719023043
Product Type
Problem Surface Sealer
Size
Quart
Coverage
87.5-112.5 Sq. Ft.
Resin Type
Water-Based Acrylic
Color
Clear
Application
Interior
Compatible Surfaces
Drywall, Plaster, Cementitious Coatings, Spackling, Joint Compound, Calcimine, Stucco & Texture Finishes
Maximum Surface pH
12.5
Ready to Use
Yes
About This Product
Seals Porous and Damaged Interior Surfaces
Zinsser® GARDZ® Problem Surface Sealer is a clear, water-based acrylic resin sealer for porous interior surfaces before painting, texturing, or wallcovering. It penetrates deeply and dries to a hard, moisture-resistant film that stabilizes problem surfaces including damaged drywall, joint compound, spackling, plaster, cementitious coatings, calcimine, stucco, and textured finishes.
Repairs and Strengthens Damaged Drywall
GARDZ penetrates and seals damaged drywall facing paper to create a sound surface for skim coating, repair, painting, or wallcovering. On new drywall, joint compound, and spackling, it uniformly seals porous areas and helps prevent blistering, bubbling, tearing, and damage during future redecorating.
Seals Wallpaper Adhesive and Chalky Surfaces
Residual wallpaper adhesive can reactivate beneath water-based paint or texture and cause cracking or peeling. GARDZ seals in old wallpaper paste and adhesive residue before recoating. Its penetrating formula also binds chalky surfaces and can be applied to high-pH surfaces up to 12.5.
Hardens Texture and Popcorn Finishes
GARDZ can be used on textured walls and popcorn ceilings where soft or crumbly material needs stabilization. It penetrates and hardens the texture while forming a water-resistant barrier that helps prevent subsequent primer, paint, or other water-based coatings from softening the underlying finish.
Clear, Low-Odor Water-Based Formula
The sealer appears milky blue-white during application to help identify coated areas and dries water clear. It is supplied ready to use and should not be tinted.
Product Resources
Documentation & Downloads
Common Questions
Frequently Asked Questions
What is Zinsser GARDZ Problem Surface Sealer used for?
GARDZ is used to seal and stabilize porous or damaged interior surfaces before painting, texturing, or wallcovering. Applications include damaged drywall, plaster, joint compound, spackling, calcimine, cementitious coatings, stucco, and textured finishes.
Can GARDZ be used on damaged drywall?
Yes. GARDZ penetrates and seals damaged drywall facing paper, helping prevent bubbling when the surface is repaired with spackling or joint compound.
Can GARDZ seal old wallpaper adhesive?
Yes. GARDZ seals residual wallpaper paste and adhesive to help prevent it from reactivating beneath water-based paint or texture finishes.
Can GARDZ be used on popcorn ceilings and textured walls?
Yes. GARDZ penetrates soft or crumbly texture material and hardens it while creating a water-resistant barrier before subsequent coatings are applied.
Can GARDZ be applied over new plaster?
Yes. Allow new plaster to cure for at least 24 hours before applying GARDZ. It can be applied to high-pH surfaces up to 12.5.
What color is GARDZ after it dries?
GARDZ has a milky blue-white appearance during application to help identify coated areas but dries water clear.
Does GARDZ need to be tinted or mixed before use?
GARDZ is designed to be used directly from the container. Tinting is not recommended.