Can You Varnish Clay With Mod Podge?

What is Mod Podge?

Mod Podge is a versatile decoupage glue, sealer, and finish that has become a staple in crafting and DIY projects. First developed in the 1960s by the company Plaid Enterprises, Mod Podge was created as an easy-to-use alternative to traditional decoupage techniques.

Mod Podge comes in several different formulations for a variety of applications:

Original Mod Podge – all-purpose formula good for most decoupage and craft projects
Matte Mod Podge – low sheen finish good for reducing glare on projects
Gloss Mod Podge – high gloss finish perfect for smooth, glass-like effects
Outdoor Mod Podge – waterproof sealant designed for outdoor use
Dimensional Magic – creates a thick, protective topcoat with a 3D effect

The key properties that make Mod Podge useful are its strong adhesive strength for gluing paper, fabric, and other porous materials to various surfaces, its ability to dry transparent so decoupage motifs remain visible, and its versatility as both a glue and protective sealer. Mod Podge seals craft projects against moisture, handling, and UV damage. It’s an easy to use acrylic-based formula that cleans up with water and dries to a durable, flexible finish.

Can You Use Mod Podge on Air-Dry Clay?

Yes, Mod Podge can be used on air-dry clay projects to seal and protect the clay. Mod Podge acts as a sealer and finish for clay, helping to strengthen the piece while adding a glossy coat.

There are some pros and cons to consider when using Mod Podge on clay:

Pros:

Seals the clay to help avoid chipping, cracking or peeling
Provides a glossy, finished look
Available in different finishes like gloss, satin or matte
Helps strengthen and harden the clay
Dries clear to showcase the clay’s color

Cons:

Can make the clay piece feel rigid vs. smooth
Too much Mod Podge could lead to bubbling
Dries shiny which might not be desired for some projects
Not ideal for pieces that need to flex or bend

The most commonly recommended types of Mod Podge for clay are Gloss and Matte finishes. Gloss provides a bright, shiny finish and Matte is more subtle. Use Gloss if you want a bolder, glossy look and Matte for a softer finish.

Satin is another good option as it has a finish in-between Gloss and Matte. Go for Gloss or Satin if you want more durability. Avoid Outdoor or Dimensional finishes as they can be thick or chunky on clay.

Preparing the Clay Surface

Properly preparing the surface of the clay before sealing it with Mod Podge is a critical step. Air-dry clay needs to be fully cured and hardened before applying any type of sealer or varnish. If the clay is still soft or pliable, the Mod Podge will not adhere properly and can cause stickiness, wrinkling, or peeling.

It’s recommended to allow air-dry clay sculptures or projects to cure for at least 24-48 hours. Providing adequate drying time prevents cracking or crumbling when handling the piece. The clay also needs to be fully dry to the touch with no cold or damp spots.

Once cured, sanding and smoothing the clay prior to sealing will help the Mod Podge coat evenly. Use a fine grit sandpaper or sanding sponge to gently smooth any rough areas, fingerprints, or seams on the clay surface. This removes imperfections and creates a uniform surface for the Mod Podge to adhere to.

Wipe away any dust with a dry cloth after sanding. Proper clay curing and sanding provides the ideal prepared surface for successfully using Mod Podge as a sealer and finish on air-dry clay artworks.

Applying Mod Podge to Clay

When applying Mod Podge to cured clay, you have two main options – using a brush to paint it on or spraying it on. Both methods work well, so it’s largely a matter of personal preference.

If using a brush, choose one with synthetic bristles. A flat or round brush 1-2 inches wide usually works best for getting smooth, even coverage. Dip the brush into the Mod Podge and apply a thin, even layer across the entire surface of the clay piece. Avoid brushing back and forth too much or you may start pulling up clay particles.

Spraying Mod Podge can help you achieve a more even application. Make sure to spray in a well-ventilated area and avoid inhaling vapors. Hold the can 6-8 inches from the clay and apply a light, misting coat using smooth back and forth motions. Rotate the piece to coat all sides.

For both brushing and spraying, 2-3 thin coats are recommended for best results. Allow each coat to dry completely before adding the next, usually 20-30 minutes. Adding too many thick coats can lead to cracking or clumping. Sand lightly between coats if needed to smooth any drips or rough spots.

Applying thin, multiple coats allows the Mod Podge to fully penetrate the clay for maximum sealing and strength. Patience as each layer dries is key to avoiding imperfections.

Sealing the Finished Piece

Once you have applied Mod Podge to the clay and allowed it to fully dry and cure, it is recommended to seal the piece with a protective top coat. This will help shield the clay from scratches, scuffs, and wear over time. There are a few options when it comes to choosing a sealer:

Polyurethane

A water-based polyurethane is an excellent choice for sealing Mod Podged clay. Make sure to use an indoor/outdoor variety, as this will provide better protection from moisture. Apply 2-3 thin, even coats of polyurethane with a brush, allowing each coat to fully dry in between applications. This will create a durable, scratch-resistant barrier over the clay.

Acrylic Spray Sealer

An acrylic spray sealant formulated for crafts can also be used. Look for one that is non-toxic and low odor. Apply several light mist coats to the surface of the clay, allowing it to dry completely between coats. The acrylic provides a protective finish that helps prevent chipping and scuffing.

Clear Glaze

Applying a clear acrylic glaze or varnish is another option for sealing Mod Podged clay pieces. Use a soft brush to apply it smoothly and evenly over the surface. Make sure to let it fully cure before handling. The glaze finish will help repel moisture and prevent damage.

Any of these sealants will add a layer of protection to keep your Mod Podged clay artwork looking its best for years to come. Be sure to take care and gently handle the piece even after sealing it.

Tips for Achieving Best Results

When using Mod Podge on clay, there are some tips to follow to get the best possible results. Here are some suggestions for avoiding common problems and creating a smooth, vibrant finish:

Avoid Bubbles and Brush Strokes: Go slowly and gently when applying Mod Podge to prevent bubbles from forming. Use a foam brush or soft brush and apply the Mod Podge in thin, even coats. Let each coat dry completely before adding another. Sand lightly between coats if needed to smooth out any bumps.

Maintain Color Vibrancy: Mod Podge acts as a sealer and protectant for clay, but can slightly dull and darken colors. To help maintain the original vibrancy, apply the Mod Podge in thin coats and avoid over-brushing. Let the clay fully dry after painting before sealing. You can also try spraying with an acrylic sealant instead of brushing on Mod Podge.

Mod Podge Clay Project Ideas

Mod Podge is a versatile product that can be used to seal and decorate all kinds of clay crafts. Here are some creative ways to use Mod Podge on air-dry clay projects:

Jewelry and Decor Items

Mod Podge is great for adding shine and durability to jewelry made with clay. Coat clay beads, pendants, earrings, and brooches with a layer of Mod Podge to seal and protect them. You can also decoupage paper, fabric, or other embellishments onto the clay using Mod Podge before sealing the finished piece.

For decor items like vases, bowls, and figurines, brush on a coat of Mod Podge to seal then paint or decoupage designs. Add dimensional details like faux gems, beads, or mosaic tiles using Mod Podge as an adhesive. The glossy finish will enhance the colors and patterns.

Figurines and Sculptures

From miniature dragons to busts and full sculptures, Mod Podge helps secure fragile clay details in place and provides an attractive finish. After baking clay figurines or sculptures, seal the raw clay with Mod Podge. Once dry, you can paint designs directly on the surface or decoupage paper or fabric over the top.

Mod Podge also allows you to attach additional clay pieces, findings, and embellishments. Let the sealant dry fully between layers for the strongest hold. The glossy coating will make the colors pop while giving your piece a smooth, sleek appearance.

Caring for a Mod Podged Clay Piece

Once your clay sculpture or decorative piece has been sealed with Mod Podge, you’ll want to be sure to care for it properly so it maintains its beauty. Here are some tips for keeping your Mod Podged clay art looking its best:

Cleaning and Dusting

Mod Podge forms a durable, water-resistant seal on clay, so feel free to gently clean your finished piece with a soft, dry cloth to remove any dust or dirt. You can also use a slightly damp cloth if needed. Avoid submerging the piece in water or using harsh cleaners, as this could break down the Mod Podge over time.

Storing Properly

When not on display, store your Mod Podged clay piece somewhere safe from drops, bumps, or other impacts that could cause chips or cracks. Place delicate clay creations inside a cabinet or on a high shelf, and lay anything fragile flat instead of standing it upright. You may wish to wrap or box the item before storing to prevent dust buildup. Avoid temperature extremes and high humidity. With proper care, your clay artwork can last for many years!

Common Problems and Solutions

When using Mod Podge on clay, there are a couple common issues that can arise:

Crackling or Flaking

If you notice the Mod Podge layer cracking or flaking off the clay, there are a few potential causes:

Applying too thick of a coat – Multiple thin layers are better than one thick layer.
Not allowing proper dry time between coats – Be patient and allow each layer to fully dry before adding the next.
Clay not fully cured – Ensure clay is completely dry and cured before applying Mod Podge.
Too much flexing – Avoid bending or twisting pieces before they are fully sealed.

To fix flaking, gently sand any loose edges and reapply Mod Podge in thin coats. Allow extended dry time between applications.

Yellowing Over Time

Mod Podge can develop a yellowish tint over time, especially with exposure to sunlight. To minimize yellowing:

Use an outdoor or UV-resistant formula like Mod Podge Outdoor.
Apply a protective UV-resistant sealant like polyurethane after the Mod Podge has fully cured.
Display indoor out of direct sunlight.

If yellowing does occur, sometimes it can be reversed by applying a fresh layer of non-yellowed Mod Podge over the piece.

Frequently Asked Questions

Using Mod Podge on clay projects can sometimes lead to questions. Here are answers to some of the most common questions about Mod Podging clay:

Is Mod Podge waterproof when used on clay?

Yes, when properly applied and fully cured, Mod Podge forms a water-resistant seal on clay surfaces. However, prolonged exposure to moisture is still not recommended.

How long does it take for Mod Podge to dry on clay?

Mod Podge will be touch-dry on clay in about 20-60 minutes. It takes a full 24 hours to completely cure and harden. Allow even more time if using multiple coats.

Can I use acrylic paint with Mod Podge on clay?

Yes, acrylic paint works well to color clay before applying Mod Podge as a topcoat. Be sure the paint is completely dry first.

Does Mod Podge work on polymer clay?

Mod Podge adheres well to cured polymer clay. Make sure the surface is smooth, clean and dust-free before applying it.

What finish does Mod Podge give clay?

Mod Podge provides a smooth, glossy finish when used on clay. Matte and satin finishes are also available.