gasket sealant
Skip itPrices mostly outside the sweet spot ($3.23–$13.48) — this niche doesn't clear our bar today.
Returns
Incredible0.7%return rate — above 5% kills the launch gate
Conversion
Incredible12.5%search→purchase rate — share of searches ending in a sale
Review moat
Good1,498.4avg incumbent reviews — the moat a new listing must climb
Brand share
Okay79%top-5 brand share — brands hold most of the demand
Competition
Okay66%top-5 click share — leaders hold, buyers still browse
Growth
Okay+4.0%90-day search growth — must beat 0% to launch
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Market size
Bad£89K£89K/yr · 98K searches
Avg price
Bad£7.32avg listing price — sweet spot $15–$100
Price range
Bad£3.23–£13.48cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United Kingdom niche tracking, gasket sealant is a £89K/yr Amazon United Kingdom market (98K searches/yr). The top 5 brands hold 79% of demand. Verdict: Skip it — 43/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
gasket sealant market data
- Units sold / yr
- 10K–13K
- avg 500–750/product
- Revenue / yr
- £73K–£92K
- units × avg price
- Conversion rate
- 12.5%
- Avg BSR
- #128
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 80%
- Out of stock
- 0.4%
- Avg brand age
- 53 months
- Avg seller age
- 177 days
Competition & brand share
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.Brands
11 falling
Sellers
56
Top-5 brand share
79%
Top 20: 100%
Top-5 click share
66%
Top 20: 100%
Open market
13%
- Visbella22%
- LOCBONDSO18%
- J-B Weld15%
- Wynn's13%
- flintronic12%
- TUFROX8%
- Open — no brand owns it (5 brands, 13%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +4.0% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.6×
Top gasket sealant search terms
- gasket sealant33K/yr
- rtv gasket sealant11K/yr
- rtv silicone8K/yr
- instant gasket9K/yr
- gasket maker6K/yr
- rtv sealant6K/yr
- rtv4K/yr
- petrol resistant sealant3K/yr
- gasket sealer3K/yr
- sump gasket sealant3K/yr
Top gasket sealant products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 15 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Visbella High Temperature RTV Silicone Gasket Maker Sealed Oil Resistant Waterproof Quick Dry Liquid for Bonding Internal Combustion Steam Turbines Automotive Engine Parts 3.7OZ (BLACK)
Visbella£5.734.6★525 rev
LOCBONDSO High Temperature Silicone Sealant Engine - Antifreeze-resistant Heat-resistant Sealant for Oil Pan & Valve Cover Gasket (RTV 85g)
LOCBONDSO£6.284.5★58 rev
Wynns Black Gasket Maker - Heat & Cold Resistant - Waterproof & Oil Resistant - Ideal for Engine Components & Automotive Applications - 200ml
Wynn's£13.484.7★574 rev
J-B Weld 31314 High Temperature RTV Silicone Gasket Maker and Sealant - Red - 3 oz.
J-B Weld£7.584.6★7,002 rev
RTV Silicone Instant Gasket Maker Grey 45g Tube High Temp 662F Flexible Sealant for Automotive Engine Exhaust and Industrial Repairs Oil & Fluid Resistant Adhesive
TUFROX£3.234.8★37 rev
Newest
by launch date
Comioke 2PCS High Temperature RTV Silicone Instant Gasket Silicone Engine Repair Gasket Seal Sealant Glue Heat Resistant from -80F to 600F Water Resistance Anti-Freeze Remain Flexible black
Comioke£5.1011 rev
LOCBONDSO High Temperature Silicone Sealant Engine - Antifreeze-resistant Heat-resistant Sealant for Oil Pan & Valve Cover Gasket (RTV 85g)
LOCBONDSO£6.2858 rev
RTV Silicone Instant Gasket Maker Grey 45g Tube High Temp 662F Flexible Sealant for Automotive Engine Exhaust and Industrial Repairs Oil & Fluid Resistant Adhesive
TUFROX£3.2337 rev
Visbella Gasket Maker Oil Resistant Sensor Safe Neutral RTV Silicone Sealant Non-Corrosive High Flexibility Ideal for Domestic & Older Vehicles 99g (Grey)
Visbella£5.84413 rev
Realth Silicone Gasket Maker 1 PC 368g Black RTV for Automotive
Realth£11.271,461 rev
Trending
90-day click momentumComioke 2PCS High Temperature RTV Silicone Instant Gasket Silicone Engine Repair Gasket Seal Sealant Glue Heat Resistant from -80F to 600F Water Resistance Anti-Freeze Remain Flexible black
Comioke£5.104.6★
J-B Weld 32329 Ultimate Black RTV Silicone Gasket Maker and Sealant 3. Fluid_Ounces
J-B Weld£8.404.6★
RTV Silicone Instant Gasket Maker Grey 45g Tube High Temp 662F Flexible Sealant for Automotive Engine Exhaust and Industrial Repairs Oil & Fluid Resistant Adhesive
TUFROX£3.234.8★
LOCBONDSO High Temperature Silicone Sealant Engine - Antifreeze-resistant Heat-resistant Sealant for Oil Pan & Valve Cover Gasket (RTV 85g)
LOCBONDSO£6.284.5★
flintronic RTV Engine Sealant 85ml Silicone Gasket Sealant High Temperature Silicone Sealant Oil Water Resistance Anti-Freeze Sealing for Automotive Motorbike Machine Equipment Repairing (Black)
flintronic£5.714.6★
What buyers say about gasket sealant
What buyers praise and complain about, mined from review topics.What buyers love
“Great product, as described, arrived on time”
“Works well as usual”
“Reasonable price paid for this”
“No leakage”
“Easy to use”
“has held well since being used”
“Did the job”
“Bought to resale a transit van sump, it did the job without any problems, resealed,Torqued up sump bolts after 2hrs and let it cure for 24hrs before I added oil and the sump was oil tight not a drip of oil in sight,would recommend this product”
“Followed the instructions, 2mm bead, leave alone to skin over, and assembled”
“Good product - tested to 750 degrees”
What buyers complain about
“Difficult to use”
“Poor quality”
“came with minimal to no direction of use”
“wasted a significant amount of product”
“wasted a significant amount of product”
“Didnt work as described awful product”
“Not red and it shrinks”
“What a mess”
“Arrived without the nozzle”
“turns out it bright orange”
Top return reasons
Common questions
- Is gasket sealant profitable to sell on Amazon United Kingdom?
- The niche generates £89K/yr across 15 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +4.0%. Flapen's verdict: Skip it (43/100).
- How competitive is the gasket sealant niche?
- 11 brands and 56 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 79% of demand.
- What do buyers complain about in gasket sealant?
- Top complaints mined from reviews: Ease Of Use, Quality-Overall, Instructions/User Manual/Troubleshooting. The return rate is 0.7%.
- When does demand for gasket sealant peak?
- Demand is steady year-round — the busiest month runs 1.6× the quietest.
- What does it cost to enter the gasket sealant niche?
- Listings span £3.23–£13.48; the average listing price is £7.32 (sweet spot $15–$100). The average incumbent carries 1,498 reviews — the moat a new listing must climb.