---
title: "ultracal 30 — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/arts-crafts-sewing/ultracal-30"
last_updated: "2026-07-14T05:16:47.934Z"
locale: en
meta:
  description: "brand-locked demand (top 5 brands take 100% of clicks) — ultracal 30 doesn't clear our bar today."
  "og:description": "brand-locked demand (top 5 brands take 100% of clicks) — ultracal 30 doesn't clear our bar today."
  "og:title": "ultracal 30 — Niche Verdict: Skip it (39/100) | Amazon United States - Flapen"
---

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# **ultracal 30**

**Skip it**

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Market size 8Growth 54Conversion 54Competition 12Returns 86Price range 73Avg price 93Brand share 0Review moat 75Quality gap 23

**Avg price**

**Great****$50.18**

avg listing price — sweet spot $15–$100

**Returns**

**Great****1.5%**

return rate — above 6% kills the launch gate

**Review moat**

**Good****506.56**

avg incumbent reviews — the moat a new listing must climb

**Price range**

**Good****$17.91–$131.11**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Growth**

**Good****+25.9%**

90-day search growth — must beat 0% to launch

**Conversion**

**Good****4.5%**

search→purchase rate — share of searches ending in a sale

**Quality gap**

**Bad****4.6★**

avg incumbent rating — lower means beatable quality

**Competition**

**Bad****85%**

top-5 click share — a locked-up shelf

**Market size**

**Bad****$33K**

$33K/yr · 15K searches

**Brand share**

**Bad****100%**

top-5 brand share — brand-locked demand

## **Competition**

The top 5 products capture 85% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**5 **▲rising

**Sellers**

**6**

**Top-5 brand share**

**100%**

**Open market**

**0%**

- Laguna57% - USG30% - Falling in Art6% - Capital Ceramics5% - CASTDIY3% - Open — no brand owns it (0%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%15%$5K30%$10K45%$15K60%$20K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 9 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![ULTRACAL 30 Gypsum Cement - Plaster - for Dot Mandala Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail (10 lb)](https://m.media-amazon.com/images/I/410C25teUsL.jpg)**ULTRACAL 30 Gypsum Cement - Plaster - for Dot Mandala Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail (10 lb)**Laguna**$35.61**4.6★961 rev](https://www.amazon.com/dp/B06XWR2QD8) [2![Ultracal 30 Gypsum Cement 2.5 lbs / 1.13 kg - Plaster - For Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/51uYo-2Ir7L.jpg)**Ultracal 30 Gypsum Cement 2.5 lbs / 1.13 kg - Plaster - For Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail**USG**$21.56**4.5★311 rev](https://www.amazon.com/dp/B01EK5BRPW) [3![10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/41f+z+8h0+L.jpg)**10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail**USG**$32.87**4.7★187 rev](https://www.amazon.com/dp/B08PH694H9) [4![Falling in Art 5 LB Plaster of Paris Hand Mold Casting Kit Powder Gypsum Cement Pottery & Ceramic Plaster Powder for Crafts Sculpture Diorama and Home Decor](https://m.media-amazon.com/images/I/41KPazpPNFL.jpg)**Falling in Art 5 LB Plaster of Paris Hand Mold Casting Kit Powder Gypsum Cement Pottery & Ceramic Plaster Powder for Crafts Sculpture Diorama and Home Decor**Falling in Art**$18.82**4.5★2,690 rev](https://www.amazon.com/dp/B077MD57S3) [5![ULTRACAL 30 Gypsum Cement - 25 LBS - Mold Making and Casting Plaster Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/31sPsJq8cGL.jpg)**ULTRACAL 30 Gypsum Cement - 25 LBS - Mold Making and Casting Plaster Ideal for Latex Molds! Takes Excellent Detail**USG**$63.63**4.8★35 rev](https://www.amazon.com/dp/B08PHPBYKB)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![CASTDIY Casting Powder 1 kg Zero Bubbles Super White Super Hard Odorless Plaster Gypsum Powder for Silicone Molds 30 Minutes Demold Suitable for Handicrafts Decorations Plaster Statues DIY](https://m.media-amazon.com/images/I/41M3WjgxgLL.jpg)**CASTDIY Casting Powder 1 kg Zero Bubbles Super White Super Hard Odorless Plaster Gypsum Powder for Silicone Molds 30 Minutes Demold Suitable for Handicrafts Decorations Plaster Statues DIY**CASTDIY**$17.91**92 rev1y ago](https://www.amazon.com/dp/B0FF22CG74) [![10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/41f+z+8h0+L.jpg)**10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail**USG**$32.87**187 rev5y ago](https://www.amazon.com/dp/B08PH694H9) [![ULTRACAL 30 Gypsum Cement - 25 LBS - Mold Making and Casting Plaster Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/31sPsJq8cGL.jpg)**ULTRACAL 30 Gypsum Cement - 25 LBS - Mold Making and Casting Plaster Ideal for Latex Molds! Takes Excellent Detail**USG**$63.63**35 rev5y ago](https://www.amazon.com/dp/B08PHPBYKB) [![40 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/51q06S-YayL.jpg)**40 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail**USG**$99.82**20 rev6y ago](https://www.amazon.com/dp/B089QX3YX2) [![ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail (50 lb) Ships in Two 25 Pound Boxes](https://m.media-amazon.com/images/I/410C25teUsL.jpg)**ULTRACAL 30 Gypsum Cement - Plaster - for Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail (50 lb) Ships in Two 25 Pound Boxes**Laguna**$131.11**100 rev6y ago](https://www.amazon.com/dp/B083RJHRBH)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/41f+z+8h0+L.jpg)**10 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail**USG**$32.87**4.7★**▲ 20%**](https://www.amazon.com/dp/B08PH694H9) [![Ultracal 30 Gypsum Cement 2.5 lbs / 1.13 kg - Plaster - For Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/51uYo-2Ir7L.jpg)**Ultracal 30 Gypsum Cement 2.5 lbs / 1.13 kg - Plaster - For Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail**USG**$21.56**4.5★**▲ 14%**](https://www.amazon.com/dp/B01EK5BRPW) [![CASTDIY Casting Powder 1 kg Zero Bubbles Super White Super Hard Odorless Plaster Gypsum Powder for Silicone Molds 30 Minutes Demold Suitable for Handicrafts Decorations Plaster Statues DIY](https://m.media-amazon.com/images/I/41M3WjgxgLL.jpg)**CASTDIY Casting Powder 1 kg Zero Bubbles Super White Super Hard Odorless Plaster Gypsum Powder for Silicone Molds 30 Minutes Demold Suitable for Handicrafts Decorations Plaster Statues DIY**CASTDIY**$17.91**4.6★**— 2%**](https://www.amazon.com/dp/B0FF22CG74) [![ULTRACAL 30 Gypsum Cement - Plaster - for Dot Mandala Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail (10 lb)](https://m.media-amazon.com/images/I/410C25teUsL.jpg)**ULTRACAL 30 Gypsum Cement - Plaster - for Dot Mandala Mold Making and Casting Ideal for Latex Molds! Takes Excellent Detail (10 lb)**Laguna**$35.61**4.6★**— 1%**](https://www.amazon.com/dp/B06XWR2QD8) [![40 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail](https://m.media-amazon.com/images/I/51q06S-YayL.jpg)**40 Lbs ULTRACAL 30 Gypsum Cement - Plaster - for Moldmaking and Casting Ideal for Latex Molds! Takes Excellent Detail**USG**$99.82**4.9★**— 4%**](https://www.amazon.com/dp/B089QX3YX2)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — +25.9% search growth over the last 90 days.

400300Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Quality-Overall**20%

*“Great quality”*

**Ease Of Use**13%

*“easy to use”*

**Value For Money**10%

*“Best $ can buy”*

**Advertised Vs Actual Product**7%

*“as described”*

**Office Usability**7%

*“Works great, made a bunch of little desk geese”*

**Paint Quality**4%

*“Its very durable for painting and kid hands”*

**Size-Overall**3%

*“is a good size”*

**Assembly/Installation**3%

*“Sets up super fast”*

**Time Taken**3%

*“Quick, easy, and great results”*

**Durability**3%

*“Its very durable for painting and kid hands”*

### **What buyers complain about **

**Value For Money**14%

*“Over priced”*

**Functionality-Overall**13%

*“Didnt work for me”*

**Quality-Overall**11%

*“Unfortunately, the quality has not been consistent”*

**Instructions/User Manual/Troubleshooting**8%

*“No directions on the mixing ratio or anything”*

**Advertised Vs Actual Product**8%

*“Not as advertised”*

**Thickness**7%

*“However, with my second and third purchases, the powder became extremely thick as soon as it touched the water and formed lots of lumps”*

**Weight Heavy**4%

*“definitely feels heavy like cement”*

**Assembly/Installation**4%

*“To fast to set”*

**Paint Quality**4%

*“and doesn't take paint worth a crap”*

### **Top return reasons **

**Value For Money**30%

**Advertised Vs Actual Product**23%

**Functionality-Overall**8%

**Material Quality**7%

**Size-Overall**7%

**Leak-Proof**5%

**Color**4%

**Defective Material/Parts**3%

**Drying Time**2%

**Strength**2%