Zyp Boron Nitride Spray Ceramic Mold Release - Smooth High-Temp

In this review of the Zyp Boron Nitride Spray Ceramic Mold Release, the bottom line is simple: it is a practical water-based BN spray for glass artists and crafters who need a reliably smooth, high-temperature release on ceramic and stainless steel molds. The product stands out because it produces a flawlessly smooth finish and tolerates temperatures up to 1800F, making it useful for slumping and casting glass. This review looks at real user experiences and product details to help decide if this is the right mold release for studio use.

Key Features

• Flawlessly smooth finish: Leaves a consistent, low-friction coating so glass releases cleanly from ceramic molds for neater slumping and casting results.
• High temperature tolerance: Effective at temperatures up to 1800F, which covers most glassworking slumping and casting cycles.
• Works on ceramic and stainless steel molds: Formulated for non-glazed bisque surfaces and can be used on stainless steel when the metal is preheated.
• Non-flammable and non-hazardous: Water-based formula avoids the risks of solvent aerosols and is safer to store and use in small studios.
• Adjustable viscosity: Can be thinned slightly with water if a thinner coat is preferred for fine detail or brush application.

Who It's For

The Zyp Boron Nitride Spray is best suited to stained glass makers, kiln glass artists, and hobbyists who work primarily with ceramic molds and need a dependable release at high firing temperatures. It appeals to those who prefer a water-based, non-flammable option over solvent aerosols and who value a smooth finish for repeatable results.

Artists who rely heavily on metal molds may need to look elsewhere or accept an extra step of preheating metal to about 150-200 C (300-400 F) before application. Also, users who require an aerosol with consistently clog-free spraying should be aware some customers reported occasional sprayer issues.

Pros & Cons

Pros

• Produces a smooth, low-friction surface that helps glass release cleanly from ceramic molds.
• High temperature capability up to 1800F makes it suitable for many slumping and casting applications.
• Water-based, non-flammable formulation is safer for studio use and storage.
• Can be thinned with water to adjust application thickness or for brush use.

Cons

• Some users report inconsistent spray performance or occasional sprayer clogging, which can affect ease of application.
• Not recommended for metal molds unless preheated, adding an extra step for metal mold work.

Specifications

Product name	Zyp Boron Nitride Spray Ceramic Mold Release - 12 Oz
Formula type	Water-based boron nitride paint
Temperature rating	Effective up to 1800F
Recommended substrates	Ceramic (bisque) and stainless steel molds
Flammability	Non-flammable, non-hazardous
Thinning	Can be thinned slightly with water
Can be used on metal	Yes, if metal preheated to ~150-200 C (300-400 F)

Our Verdict

The Zyp Boron Nitride Spray is a solid choice for glass artists working with ceramic molds who want a non-flammable, high-temperature release that creates a smooth finish. It is good value for studios that prioritize safety and consistent release, though those relying on metal molds or needing flawless aerosol performance should be prepared for additional steps or occasional sprayer maintenance.

Frequently Asked Questions

Can this be used on metal molds?
Yes, but the metal mold should be preheated to about 150-200 C (300-400 F) before applying the water-based BN paint for best adhesion.

Is this product safe to store in a small studio?
Yes. The formula is water-based, non-flammable, and labeled non-hazardous, making it safer for small studio storage than solvent aerosols.

Can I thin the spray for brush application?
Yes. The product can be thinned slightly with water to achieve a thinner consistency suitable for brushing or more delicate coverage.