---
title: "dometic toilet seal — Niche Verdict: Worth a look (56/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/dometic-toilet-seal"
last_updated: "2026-07-14T04:27:29.537Z"
locale: en
meta:
  description: "dometic toilet seal shows searches that convert (12.9% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list."
  "og:description": "dometic toilet seal shows searches that convert (12.9% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list."
  "og:title": "dometic toilet seal — Niche Verdict: Worth a look (56/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **dometic toilet seal**

**Worth a look**

Shows searches that convert (12.9% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 29Growth 87Conversion 96Competition 12Returns 77Price range 66Avg price 61Brand share 30Review moat 79Quality gap 60

**Conversion**

**Incredible****12.9%**

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

**Growth**

**Great****+89.8%**

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

**Review moat**

**Great****415.18**

avg incumbent reviews — the moat a new listing must climb

**Returns**

**Great****1.9%**

return rate — above 6% kills the launch gate

**Price range**

**Good****$6.09–$32.21**

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

**Avg price**

**Good****$13.27**

avg listing price — sweet spot $15–$100

**Quality gap**

**Good****4.4★**

avg incumbent rating — lower means beatable quality

**Brand share**

**Okay****87%**

top-5 brand share — brands hold most of the demand

**Market size**

**Okay****$128K**

$128K/yr · 75K searches

**Competition**

**Bad****86%**

top-5 click share — a locked-up shelf

## **Competition**

The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**9 **▼falling

**Sellers**

**36**

**Top-5 brand share**

**87%**

**Open market**

**7%**

- Tecreddy26% - Dometic21% - RNTKAB17% - TeegRoow16% - NZRAQK7% - Rakiyada5% - Open — no brand owns it (3 brands, 7%)

## **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%10%$13K20%$26K30%$38K40%$51K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 11 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Tecreddy RV Toilet Seal Replacement for Dometic 300 310 320 Toilet Seal Gasket Kit - Replace Part #385311658 2-Pack](https://m.media-amazon.com/images/I/31kldgHWkZL.jpg)**Tecreddy RV Toilet Seal Replacement for Dometic 300 310 320 Toilet Seal Gasket Kit - Replace Part #385311658 2-Pack**Tecreddy**$17.68**4.5★656 rev](https://www.amazon.com/dp/B0B36YW56Q) [2![Dometic Genuine OEM Flush Ball Seal Kit 385311658 | for 300 and 400 Series Toilets](https://m.media-amazon.com/images/I/31CHKCTbMpL.jpg)**Dometic Genuine OEM Flush Ball Seal Kit 385311658 | for 300 and 400 Series Toilets**Dometic**$32.21**4.7★1,378 rev](https://www.amazon.com/dp/B00BRIFDY2) [3![RV Toilet Seal Flush Ball Seal Gasket Replacement for Dometic 300/310/320 - Upgraded 385311658 - Toilet Seal Parts to Solve The Leakage Problem 2-Pack](https://m.media-amazon.com/images/I/41tdxEbUYJL.jpg)**RV Toilet Seal Flush Ball Seal Gasket Replacement for Dometic 300/310/320 - Upgraded 385311658 - Toilet Seal Parts to Solve The Leakage Problem 2-Pack**RNTKAB**$8.58**4.2★408 rev](https://www.amazon.com/dp/B0DL58DPCY) [4![RV Toilet Seal Replacement 2-Pack for Dometic 300/310/320 Toilets High-Grade Flush Ball Seal Gasket Kit 385311658 - Durable Rubber Easy Installation Fix Leakage & Odor for Camper/Travel Trailers](https://m.media-amazon.com/images/I/41eldtSB2pL.jpg)**RV Toilet Seal Replacement 2-Pack for Dometic 300/310/320 Toilets High-Grade Flush Ball Seal Gasket Kit 385311658 - Durable Rubber Easy Installation Fix Leakage & Odor for Camper/Travel Trailers**TeegRoow**$9.85**4.4★222 rev](https://www.amazon.com/dp/B0F6D189ZN) [5![RV Toilet Seal Flush Ball Seal Gasket Replacement 385311658 for Dometic 300/310/320 High-Grade Rubber Toilet Seal Parts Solve The Leakage Problem 2-Pack](https://m.media-amazon.com/images/I/41CuCx6Lw5L.jpg)**RV Toilet Seal Flush Ball Seal Gasket Replacement 385311658 for Dometic 300/310/320 High-Grade Rubber Toilet Seal Parts Solve The Leakage Problem 2-Pack**NZRAQK**$8.61**4.4★744 rev](https://www.amazon.com/dp/B0CDC274JF)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Rakiyada RV Toilet Seal for Dometic 300/310/320/400/410/420 Upgraded Thicker Rubber Flush Ball Seal Gasket Replacement 385311658 Fix Leakage & Odor Easy Install Camper Toilet Seal 2-Pack](https://m.media-amazon.com/images/I/4141dnpf6IL.jpg)**Rakiyada RV Toilet Seal for Dometic 300/310/320/400/410/420 Upgraded Thicker Rubber Flush Ball Seal Gasket Replacement 385311658 Fix Leakage & Odor Easy Install Camper Toilet Seal 2-Pack**Rakiyada**$14.73**23 rev2mo ago](https://www.amazon.com/dp/B0GSZGV925) [![RV Toilet Seal Kit Replacement for Dometic 300 310 320 RV Toilet Parts Includes 385311652 Base Seal & 385311658 Flush Ball Seal with Mounting Hardware RV Toilet Replacement Parts for Camper Trailer](https://m.media-amazon.com/images/I/41MuEp8KOHL.jpg)**RV Toilet Seal Kit Replacement for Dometic 300 310 320 RV Toilet Parts Includes 385311652 Base Seal & 385311658 Flush Ball Seal with Mounting Hardware RV Toilet Replacement Parts for Camper Trailer**TeegRoow**$14.35**6 rev3mo ago](https://www.amazon.com/dp/B0GSRQK1S4) [![2 Pack RV Toilet Seal for Dometic 300/310/320 Toilets Leak-Proof & Odor-Free Flush Ball Seal Gasket Replacement 385311658 with Durable Rubber Easy Install Toilet Seal Parts for Camper Trailer](https://m.media-amazon.com/images/I/41KCWmPtN1L.jpg)**2 Pack RV Toilet Seal for Dometic 300/310/320 Toilets Leak-Proof & Odor-Free Flush Ball Seal Gasket Replacement 385311658 with Durable Rubber Easy Install Toilet Seal Parts for Camper Trailer**CenJows**$6.09**65 rev8mo ago](https://www.amazon.com/dp/B0FXGN68KX) [![Rakiyada RV Toilet Seal Kit Compatible with Dometic 300 310 320 400 410 420 RV Toilet Parts Replacement for 385311658 Toilet Flush Seal and 385311652 Toilet Base Seal](https://m.media-amazon.com/images/I/41tGttJ7-rL.jpg)**Rakiyada RV Toilet Seal Kit Compatible with Dometic 300 310 320 400 410 420 RV Toilet Parts Replacement for 385311658 Toilet Flush Seal and 385311652 Toilet Base Seal**Rakiyada**$14.54**59 rev1y ago](https://www.amazon.com/dp/B0FDQDY3BW) [![RV Toilet Seal Replacement 2-Pack for Dometic 300/310/320 Toilets High-Grade Flush Ball Seal Gasket Kit 385311658 - Durable Rubber Easy Installation Fix Leakage & Odor for Camper/Travel Trailers](https://m.media-amazon.com/images/I/41eldtSB2pL.jpg)**RV Toilet Seal Replacement 2-Pack for Dometic 300/310/320 Toilets High-Grade Flush Ball Seal Gasket Kit 385311658 - Durable Rubber Easy Installation Fix Leakage & Odor for Camper/Travel Trailers**TeegRoow**$9.85**222 rev1y ago](https://www.amazon.com/dp/B0F6D189ZN)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![RV Toilet Seal Kit Replacement for Dometic 300 310 320 RV Toilet Parts Includes 385311652 Base Seal & 385311658 Flush Ball Seal with Mounting Hardware RV Toilet Replacement Parts for Camper Trailer](https://m.media-amazon.com/images/I/41MuEp8KOHL.jpg)**RV Toilet Seal Kit Replacement for Dometic 300 310 320 RV Toilet Parts Includes 385311652 Base Seal & 385311658 Flush Ball Seal with Mounting Hardware RV Toilet Replacement Parts for Camper Trailer**TeegRoow**$14.35**4.1★**▲ 185%**](https://www.amazon.com/dp/B0GSRQK1S4) [![Rakiyada RV Toilet Seal for Dometic 300/310/320/400/410/420 Upgraded Thicker Rubber Flush Ball Seal Gasket Replacement 385311658 Fix Leakage & Odor Easy Install Camper Toilet Seal 2-Pack](https://m.media-amazon.com/images/I/4141dnpf6IL.jpg)**Rakiyada RV Toilet Seal for Dometic 300/310/320/400/410/420 Upgraded Thicker Rubber Flush Ball Seal Gasket Replacement 385311658 Fix Leakage & Odor Easy Install Camper Toilet Seal 2-Pack**Rakiyada**$14.73**4.1★**▲ 182%**](https://www.amazon.com/dp/B0GSZGV925) [![RV Toilet Seal Replacement 2-Pack for Dometic 300/310/320 Toilets High-Grade Flush Ball Seal Gasket Kit 385311658 - Durable Rubber Easy Installation Fix Leakage & Odor for Camper/Travel Trailers](https://m.media-amazon.com/images/I/41eldtSB2pL.jpg)**RV Toilet Seal Replacement 2-Pack for Dometic 300/310/320 Toilets High-Grade Flush Ball Seal Gasket Kit 385311658 - Durable Rubber Easy Installation Fix Leakage & Odor for Camper/Travel Trailers**TeegRoow**$9.85**4.4★**▲ 72%**](https://www.amazon.com/dp/B0F6D189ZN) [![Rakiyada RV Toilet Seal Kit Compatible with Dometic 300 310 320 400 410 420 RV Toilet Parts Replacement for 385311658 Toilet Flush Seal and 385311652 Toilet Base Seal](https://m.media-amazon.com/images/I/41tGttJ7-rL.jpg)**Rakiyada RV Toilet Seal Kit Compatible with Dometic 300 310 320 400 410 420 RV Toilet Parts Replacement for 385311658 Toilet Flush Seal and 385311652 Toilet Base Seal**Rakiyada**$14.54**4.7★**▲ 12%**](https://www.amazon.com/dp/B0FDQDY3BW) [![2 Pack RV Toilet Seal for Dometic 300/310/320 Toilets Leak-Proof & Odor-Free Flush Ball Seal Gasket Replacement 385311658 with Durable Rubber Easy Install Toilet Seal Parts for Camper Trailer](https://m.media-amazon.com/images/I/41KCWmPtN1L.jpg)**2 Pack RV Toilet Seal for Dometic 300/310/320 Toilets Leak-Proof & Odor-Free Flush Ball Seal Gasket Replacement 385311658 with Durable Rubber Easy Install Toilet Seal Parts for Camper Trailer**CenJows**$6.09**4.1★**— 9%**](https://www.amazon.com/dp/B0FXGN68KX)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — +89.8% search growth over the last 90 days.

2K2KSpike '24Holiday '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: May, Jun, Nov, Dec · busiest ÷ quietest = 2.4×

## **Reviews**

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

### **What buyers love **

**Size-Overall**20%

*“The fit was accurate”*

**Assembly/Installation**13%

*“It was are pretty easy to put on & works great”*

**Leak-Proof**9%

*“Does NOT leak”*

**Value For Money**9%

*“Good product for a good price”*

**Quality-Overall**9%

*“match the quality of the original perfectly”*

**Advertised Vs Actual Product**7%

*“As advertised”*

**Efficiency**6%

*“Works well”*

**Maintenance And Repair**3%

*“Overall, an easy and inexpensive repair that can save you from replacing the entire toilet”*

**Ease Of Use**3%

*“Easy peasy”*

**Durability**2%

*“Very durable”*

### **What buyers complain about **

**Leak-Proof**19%

*“Leak”*

**Functionality-Overall**11%

*“does not seal”*

**Water Resistance**7%

*“letts water seep thru”*

**Thickness**7%

*“The rubber feels thicker”*

**Quality-Overall**7%

*“Bad quality”*

**Value For Money**6%

*“Are these expensive”*

**Size-Overall**5%

*“Didnt fit our Dometic 310 or”*

**Compatibility-Overall**4%

*“Doesn't Fit a Dometic 310”*

**Durability**3%

*“They don't last forever”*

**Assembly/Installation**2%

*“Installation can be a bit of a pain due to the angles”*

### **Top return reasons **

**Size-Overall**61%

**Compatibility-Overall**10%

**Leak-Proof**6%

**Advertised Vs Actual Product**4%

**Defective Material/Parts**4%

**Functionality-Overall**3%

**Value For Money**2%

**Assembly/Installation**1%

**Thickness**1%

**Water Resistance**1%