Penguin Pottery Speciality Glazes
Penguin Pottery's speciality glazes offer a vast range of effects to choose from, including: vivid, bright, smooth, glossy, textured, satin, matt, opaque, semi-opaque, semi-translucent, translucent, flowing and non-flowing. Consciously crafted in Vermont, USA, these glazes are lead-free, non-toxic, and food-safe when properly fired and tested. They offer rich colours and effects you may not find in low fire formulas - try them out and let us know what you think!
A Wide Range of Glaze Effects
This speciality series is designed for potters seeking more than standard gloss or opaque finishes. It includes floating tones, layered effects, colour shifts, and atmospheric hues that reveal their character entirely after kiln firing. These mid-fire glazes offer reliable performance and vibrant results every time.
The range offers a wide variety of colours, from bold and lively reds, deep greens, and bright blues to mysterious lilacs and ethereal whites. Each glaze provides multi-dimensional results, and many are formulated to be non-flowing when applied correctly, helping to maintain crisp edges even on vertical pieces.
Results can vary depending on firing conditions, kiln calibration, and layering techniques. Potters working with high-fire clay or aiming for celadon-style clarity will find that many colours offer beautiful depth when applied over light clay bodies.
Individual Glazes and Speciality Sets
Penguin Pottery has curated a range of themed glaze sets to simplify experimentation. Each set contains eight 118ml bottles and is ideal for small studios, workshops, or potters exploring mid-fire glazes for the first time. These sets offer a balanced selection of colours across the speciality series, allowing makers to discover how shades interact when layered, thinned, or combined with clear glaze.
The collection also includes speciality materials such as the Penguin Wax Resist Pen Set and AccuBlue Wax. These tools support detailed linework, glaze separation, and controlled decoration, making them reliable for potters who rely on wax resist for intricate patterns or clean overlaps.
Individual 473ml bottles of standout colours are also available, helping makers build a personalised palette that suits their style.
Why Choose Potclays?
Potclays partners with trusted brands like Penguin Pottery Supplies to offer dependable, high-quality, mid-fire glazes backed by consistent manufacturing and responsible sources. We're proud to be a one-stop shop for pottery materials, machinery, tools and accessories, assisting potters of all skill levels in creating exceptional projects.
Need help finding the right products for you? By shopping with Potclays, you can access expert product knowledge, reliable stock levels, and a comprehensive range curated over decades of experience. Get in touch for assistance.

