CGS 18" Ceramic Half-Moon Deflectors & Pizza Stones
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For 20 years, we’ve helped grillers get the most out of their ceramic grills with racks and accessories that fit right and built to last. Whether you're a seasoned pro or just getting started — if you have questions about fit, features, or what you really need, we're here to help
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Fast, Reliable Shipping
Most orders ship out same or next business day. And, shipping’s on us for orders over $99.
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Tips & Resources
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PRODUCT DETAILS
Product Description
CGS 18" ceramic heat deflectors and pizza stones are engineered for rack systems in many kamado grills with a nominal 24" main cooking grid.
Choose half-moon deflectors for flexible two-zone grilling and barbeque setups, or select the full-round stone for dedicated pizza baking and other baking applications.
Before Ordering: Fitment and positioning depend on the specific grill and rack system being used. Always check the applicable CGS grill or rack-system product page for the recommended deflector size, support position, and setup details.
Common Grill Applications
Common rack-system applications include select setups for:
- XL Big Green EGG
- Weber Summit Kamado E6 and S6
- Pit Boss 24
- Louisiana Grills 24
Important: Cooking-grid size alone does not guarantee fitment. Kamado Joe Big Joe rack systems, for example, generally require a larger heat deflector. Always confirm the recommended size on the product page for your specific setup.
Why Choose Half-Moon Heat Deflectors?
- Grilling: Use one half for two-zone grilling
- Barbeque: Combine two halves for full indirect coverage
- Handling: Two smaller pieces are easier to place, remove, and store
- Lower replacement cost: If one half breaks, you only replace one half
- Direct fire access: Flexible positioning lets you access charcoal directly mid-cook
Setting Up the Full-Round Pizza Stone
For pizza cooks, place the full-round pizza stone above a separate heat deflector with an air gap between the two ceramic surfaces. The lower deflector blocks direct heat, while the elevated pizza stone provides the baking surface.
For even heating, the pizza stone should generally be the same diameter as, or slightly smaller than, the heat deflector positioned below it.
Check your CGS grill or rack-system page for the recommended spacers, stone height, and deflector arrangement.
Remember a Drip Pan
For barbeque cooks, we strongly recommend placing a stainless steel drip pan above the ceramic heat deflector. Ceramic is porous and can absorb grease and moisture over time. When trapped moisture is heated, it can create steam inside the ceramic and place additional stress on the stone.
Benefits of Ceramic Spacers
CGS Ceramic Spacers create an air gap above the heat deflector. Ceramic spacers can enhance your setup in several ways:
- Under a drip pan: Helps reduce scorching and burnt drippings
- Between deflectors: Creates separation in double-indirect setups
- Under a pizza stone: Adds lift and creates thermal separation
Product Details (Pair)
- Nominal size: 18-inch
- Actual diameter: Approximately 18.5 inches
- Thickness: Approximately 3/4 inch
- Weight: Approximately 14 lbs.
- Material: High-heat refractory ceramic
- Finish: Natural ceramic that darkens as it absorbs smoke during normal use
Care & Maintenance
- Do not use soap, detergents, or chemical cleaners.
- Do not clean in a dishwasher.
- Gently scrape baked-on food residue after cooling.
- Use a drip pan to protect against grease buildup.
- Avoid aggressive high-temperature cleaning burns.
- Allow ceramic to heat and cool gradually whenever possible.
- Expect natural smoke darkening and discoloration with normal use.
Frequently Asked Questions
Will these fit every kamado with a 24" cooking grid?
No. Cooking-grid diameter is only a general starting point. Deflector fitment also depends on the grill's internal dimensions, fire ring, and the rack system supporting the ceramic. Confirm the recommended size on the applicable CGS product page before ordering.
Will these work with a Kamado Joe Big Joe?
Kamado Joe Big Joe rack systems generally require a larger heat deflector. Do not select these deflectors for a Big Joe rack-system setup unless they are specifically recommended on the applicable CGS product page. The full-round stone can be used for pizza in select Big Joe setups.
Will heat escape through the gap between two half-moons?
A small amount of heat can rise through the center seam, but the gap is narrow and does not meaningfully affect indirect-cooking performance.
Can half-moons be used as a pizza stone?
A pair of half-moons can be used as an occasional pizza-baking surface when properly supported. However, the center seam does not provide the same continuous surface as a full-round stone. Regular pizza makers will generally prefer a dedicated full-round pizza stone.
Can the full-round pizza stone be used as a heat deflector?
A full-round stone can provide indirect coverage when properly supported, but we generally recommend reserving it for pizza and baking. Half-moons are more versatile for indirect and two-zone cooking, while separate ceramics help keep the pizza stone cleaner and limit its exposure to grease and direct fire.
Can I cover the deflectors with aluminum foil?
You can cover the top surface, but folds and creases may create small holes that allow grease to leak through. Avoid wrapping the underside where the foil would be exposed to direct fire. A properly sized stainless steel drip pan is the cleaner and more reliable option.
Can I clean the ceramic with a high-temperature burn?
We do not recommend aggressive high-temperature cleaning burns. Rapid or extreme temperature changes place unnecessary thermal stress on ceramic components. Gently scrape away residue after the ceramic has cooled and use a drip pan to reduce buildup.
Are half-moons better than a full-round deflector?
For most grilling and barbeque setups, half-moons provide greater flexibility because they can be used individually or as a pair. A full-round stone is better suited for pizza and other cooks that benefit from a continuous baking surface.
Brand Compatibility & Product Engineering
Ceramic Grill Store is an independent manufacturer and retailer of kamado grill accessories. We are not affiliated with or endorsed by the grill manufacturers referenced on this page.
Third-party brand and model names are used solely to identify compatible grills and cooking systems.
Since 2005, Ceramic Grill Store has engineered premium kamado accessories designed for compatibility with select grills and cooking systems.