Why Are Clay Beads Not Waterproof?
Clay is a porous material derived from earth that is molded and fired into beads. The porous nature of clay means it readily absorbs water when submerged. Water molecules easily penetrate into the micro-pores within the clay body. Over time, this exposure to water can lead to swelling, softening, and disintegration of the clay bead structure.
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Additionally, any coatings, pigments or glazes added to the clay bead may start to peel, fade or dissolve when introduced to water. Unless specially formulated for water resistance, the finishes and colors on typical clay beads are vulnerable.
While occasional minor splashing may not harm clay beads, prolonged submersion underwater can degrade them. Necklaces, bracelets or anklets made of clay beads can become misshapen, faded or fall apart when worn swimming for long periods. The moisture exposure slowly disintegrates the structural integrity of the clay.
Improving Water Resistance of Clay Beads
There are options to improve water resistance for clay beads in cases where minimal water contact will occur. With care and preventative measures, clay beads can withstand light moisture.
-Apply a Protective Sealant
Special sealants are available to coat the surface of cured clay beads. Products like varnish, wax, lacquer or polyurethane resins can be brushed on or dipped to penetrate the outermost layer of clay. This creates a barrier that repels water from seeping into the clay body. It fills in porous openings on the bead exterior. However, sealants may alter the naturally matte finish of clay. Testing is advised to find suitable waterproofing agents that retain the desired appearance.
-Use a Stabilizing Agent
Stabilizing the clay by mixing in acrylic, epoxy or polymer mediums will make it more sturdy and impermeable before firing. Agents like liquid polymer clay infuse into the raw clay to reinforce it during baking into a stronger, less porous state. The more impervious the clay, the better it will resist water saturation.
-Apply a Protective Topcoat
A topcoat like Mod Podge or resin can be brushed over completed baked clay beads to seal them. This clear finish fills in pores and creates a smooth protective layer. It’s best to use water-based topcoats rated for dishwasher or outdoor use. However, regular reapplication will be needed as topcoats wear over time.
-Avoid Prolonged Water Exposure
While sealing methods improve water resistance, clay beads should not be submerged indefinitely. Avoid wearing or using clay beads underwater for more than a few minutes at a time. Even with treatments, clay is still inherently porous and permeable compared to glass, stone, plastic or metal beads. Treat clay beads gently by removing before showering, swimming or washing dishes.
-Dry Thoroughly and Slowly
If clay beads do get wet, dry them completely by gently patting with a clean soft cloth. Allow them plenty of time to air dry fully before wearing or storing again. Avoid quick drying methods like heat guns or direct sunlight which could further damage moisture-laden beads. Slow thorough drying will prevent continued expansion or cracks.
Considering Clay Bead Composition
Keep in mind that water sensitivity can vary based on the type of clay used to make beads. Pure clay is most vulnerable. Polymer clay, while still porous, withstands moisture better. And specialized waterproof clays exist that can be submerged indefinitely with no issues. Reading manufacturer specifications before purchasing clay beads will clarify the expected water resistance. Testing a few beads is smart to check if waterproofing treatments are needed.
Proceed with Caution Around Water
Clay’s delicate nature requires caution when bringing it into contact with water. While sealing techniques can increase water resistance, they cannot make clay beads fully waterproof for prolonged submersion. Careful wearing and storage habits allow for enjoying clay beads without damage. Allowing clay beads to get saturated continuously will shorten their lifespan and cause early deterioration. For unfettered water wear, glass, crystal or plastic beads are a better choice. But with moderate care, clay beads can retain their beauty and enjoy limited water exposure. Using preventative methods, crafters can safeguard their clay creations.