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- USA
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Mr. Gasket Rear Main Seal - 1963Overview: This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. It's also injection molded for a precise fit. Features: Application: Year Make Model Submodel Engine Size 1964 1968 Ford Mustang 289 4. 7 V8 1968 1982 Ford Mustang 302 5 V8 1969 1974 Ford Ranch Wagon 351 5. 8 V8 1968
Overview:
This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. It's also injection molded for a precise fit.
Features:
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1964 - 1968 | Ford | Mustang | 289/4.7 V8 | |
| 1968 - 1982 | Ford | Mustang | 302/5 V8 | |
| 1969 - 1974 | Ford | Ranch Wagon | 351/5.8 V8 | |
| 1968 - 1972 | Ford | Ranch Wagon | 302/5 V8 | |
| 1969 - 1979 | Ford | Ranchero | 351/5.8 V8 | |
| 1968 - 1979 | Ford | Ranchero | 302/5 V8 | |
| 1977 - 1979 | Ford | Thunderbird | 351/5.8 V8 | |
| 1977 - 1981 | Ford | Thunderbird | 302/5 V8 | |
| 1969 - 1976 | Ford | Torino | 351/5.8 V8 | |
| 1980 - 1982 | Lincoln | Continental | 302/5 V8 | |
| 1980 | Lincoln | Continental | 351/5.8 V8 | |
| 1980 | Lincoln | Mark VI | 302/5 V8 | |
| 1980 | Lincoln | Mark VI | 351/5.8 V8 | |
| 1981 - 1982 | Lincoln | Mark VI | ||
| 1977 | Lincoln | Versailles | 351/5.8 V8 | |
| 1978 - 1980 | Lincoln | Versailles | ||
| 1979 - 1982 | Mercury | Capri | 302/5 V8 | |
| 1981 - 1982 | Lincoln | Town Car | ||
| 1979 - 1982 | Mercury | Grand Marquis | 302/5 V8 | |
| 1978 - 1981 | Mercury | Grand Marquis | 351/5.8 V8 | |
| 1977 | Lincoln | Versailles | 302/5 V8 | |
| 1968 - 1977 | Mercury | Comet | 302/5 V8 | |
| 1968 - 1981 | Mercury | Cougar | 302/5 V8 | |
| 1969 - 1979 | Mercury | Cougar | 351/5.8 V8 | |
| 1971 - 1981 | Mercury | Marquis | 351/5.8 V8 | |
| 1979 - 1982 | Mercury | Marquis | 302/5 V8 | |
| 1975 - 1980 | Mercury | Monarch | 302/5 V8 | |
| 1975 - 1977 | Mercury | Monarch | 351/5.8 V8 | |
| 1969 - 1976 | Mercury | Montego | 351/5.8 V8 | |
| 1978 - 1979 | Mercury | Zephyr | 302/5 V8 | |
| 1968 - 1982 | Ford | Bronco | 302/5 V8 | |
| 1966 - 1968 | Ford | Bronco | 289/4.7 V8 | |
| 1975 - 1977 | Ford | Bronco | ||
| 1981 - 1982 | Ford | Bronco | 351/5.8 V8 | |
| 1969 - 1982 | Ford | LTD | 351/5.8 V8 | |
| 1968 - 1982 | Ford | LTD | 302/5 V8 | |
| 1969 - 1977 | Ford | Custom 500 | 351/5.8 V8 | |
| 1975 - 1982 | Ford | E-100 Econoline | 351/5.8 V8 | |
| 1969 - 1982 | Ford | E-100 Econoline | 302/5 V8 | |
| 1975 - 1982 | Ford | E-100 Econoline Club Wagon | 351/5.8 V8 | |
| 1969 - 1982 | Ford | F-100 | 302/5 V8 | |
| 1972 - 1982 | Ford | F-250 | 302/5 V8 | |
| 1972 - 1980 | Ford | F-350 | 302/5 V8 | |
| 1963 - 1967 | Ford | Country Sedan | 289/4.7 V8 | |
| 1968 - 1972 | Ford | Country Squire | 302/5 V8 | |
| 1969 - 1974 | Ford | Country Squire | 351/5.8 V8 | |
| 1969 - 1974 | Ford | Country Sedan | 351/5.8 V8 | |
| 1968 - 1972 | Ford | Country Sedan | 302/5 V8 | |
| 1963 - 1967 | Ford | Country Squire | 289/4.7 V8 | |
| 1968 - 1972 | Ford | Custom 500 | 302/5 V8 | |
| 1969 - 1974 | Ford | E-200 Econoline | 302/5 V8 | |
| 1969 - 1974 | Ford | E-300 Econoline | 302/5 V8 | |
| 1962 - 1963 | Ford | Fairlane | 221/3.6 V8 | |
| 1963 - 1967 | Ford | Fairlane | 289/4.7 V8 | |
| 1962 - 1964 | Ford | Fairlane | 260/4.3 V8 | |
| 1968 - 1970 | Ford | Fairlane | 302/5 V8 | |
| 1969 | Ford | Fairlane | 351/5.8 V8 | |
| 1963 | Ford | Sprint | 221/3.6 V8 | |
| 1968 - 1974 | Ford | Torino | 302/5 V8 | |
| 1964 | Mercury | Caliente | 260/4.3 V8 | |
| 1963 - 1964 | Mercury | Comet | 260/4.3 V8 | |
| 1964 - 1967 | Mercury | Comet | 289/4.7 V8 | |
| 1969 | Mercury | Comet | 351/5.8 V8 | |
| 1964 - 1967 | Mercury | Caliente | 289/4.7 V8 | |
| 1971 | Mercury | Colony Park | 351/5.8 V8 | |
| 1968 | Mercury | Cougar | 289/4.7 V8 | |
| 1963 | Mercury | Country Cruiser | 221/3.6 V8 | |
| 1964 - 1967 | Mercury | Cyclone | 289/4.7 V8 | |
| 1968 - 1970 | Mercury | Cyclone | 302/5 V8 | |
| 1979 - 1982 | Ford | E-100 Econoline Club Wagon | 302/5 V8 | |
| 1975 - 1982 | Ford | E-150 Econoline | 351/5.8 V8 | |
| 1975 - 1982 | Ford | E-150 Econoline | 302/5 V8 | |
| 1975 - 1982 | Ford | E-150 Econoline Club Wagon | 351/5.8 V8 | |
| 1979 - 1982 | Ford | E-150 Econoline Club Wagon | 302/5 V8 | |
| 1975 - 1982 | Ford | E-250 Econoline | 351/5.8 V8 | |
| 1975 - 1982 | Ford | E-250 Econoline | 302/5 V8 | |
| 1967 | Mercury | Commuter | 289/4.7 V8 | |
| 1964 | Mercury | Cyclone | 260/4.3 V8 | |
| 1962 - 1963 | Mercury | Meteor | 221/3.6 V8 | |
| 1969 | Mercury | Cyclone | 351/5.8 V8 | |
| 1968 - 1974 | Mercury | Montego | 302/5 V8 | |
| 1971 | Mercury | Monterey | 351/5.8 V8 | |
| 1966 - 1967 | Mercury | Voyager | 289/4.7 V8 | |
| 1964 - 1967 | Mercury | Villager | 289/4.7 V8 | |
| 1975 - 1976 | Ford | Elite | 351/5.8 V8 | |
| 1964 - 1967 | Ford | Custom 500 | 289/4.7 V8 | |
| 1964 | Ford | Custom 500 | 260/4.3 V8 | |
| 1963 - 1964 | Mercury | Villager | 260/4.3 V8 | |
| 1963 - 1964 | Ford | Galaxie 500 | 260/4.3 V8 | |
| 1963 - 1967 | Ford | Galaxie 500 | 289/4.7 V8 | |
| 1963 | Ford | 300 | 289/4.7 V8 | |
| 1964 | Ford | Custom | 260/4.3 V8 | |
| 1963 | Ford | 300 | 260/4.3 V8 | |
| 1965 - 1967 | Ford | Custom | 289/4.7 V8 | |
| 1969 - 1972 | Ford | Custom | 351/5.8 V8 | |
| 1968 - 1972 | Ford | Custom | 302/5 V8 | |
| 1963 - 1964 | Ford | Country Sedan | 260/4.3 V8 | |
| 1963 - 1964 | Ford | Country Squire | 260/4.3 V8 | |
| 1963 - 1964 | Ford | Falcon | 260/4.3 V8 | |
| 1964 - 1968 | Ford | Falcon | 289/4.7 V8 | |
| 1968 - 1970 | Ford | Falcon | 302/5 V8 | |
| 1969 - 1970 | Ford | Mustang | 351/5.8 V8 | |
| 1963 - 1964 | Ford | Ranchero | 260/4.3 V8 | |
| 1965 - 1967 | Ford | Ranchero | 289/4.7 V8 | |
| 1963 - 1964 | Ford | Ranch Wagon | 260/4.3 V8 | |
| 1963 - 1967 | Ford | Ranch Wagon | 289/4.7 V8 | |
| 1963 - 1964 | Ford | Sprint | 260/4.3 V8 | |
| 1975 - 1982 | Ford | E-250 Econoline Club Wagon | 351/5.8 V8 | |
| 1979 - 1980 | Ford | E-250 Econoline Club Wagon | 302/5 V8 | |
| 1975 - 1982 | Ford | E-350 Econoline | 302/5 V8 | |
| 1975 - 1982 | Ford | E-350 Econoline | 351/5.8 V8 | |
| 1977 - 1982 | Ford | E-350 Econoline Club Wagon | 351/5.8 V8 | |
| 1979 - 1980 | Ford | E-350 Econoline Club Wagon | 302/5 V8 | |
| 1975 - 1982 | Ford | F-150 | 302/5 V8 | |
| 1981 - 1982 | Ford | F-150 | 351/5.8 V8 | |
| 1981 - 1982 | Ford | F-250 | 351/5.8 V8 | |
| 1981 - 1982 | Ford | F-350 | 351/5.8 V8 | |
| 1978 - 1979 | Ford | Fairmont | 302/5 V8 | |
| 1972 - 1976 | Ford | Gran Torino | 351/5.8 V8 | |
| 1975 - 1980 | Ford | Granada | 302/5 V8 | |
| 1975 - 1977 | Ford | Granada | 351/5.8 V8 | |
| 1977 - 1979 | Ford | LTD II | 302/5 V8 | |
| 1977 - 1979 | Ford | LTD II | 351/5.8 V8 | |
| 1971 - 1977 | Ford | Maverick | 302/5 V8 | |
| 1975 - 1978 | Ford | Mustang II | 302/5 V8 | |
| 1963 - 1964 | Ford | Falcon Sedan Delivery | 260/4.3 V8 | |
| 1963 - 1967 | Ford | Galaxie | 289/4.7 V8 | |
| 1969 - 1974 | Ford | Galaxie 500 | 351/5.8 V8 | |
| 1968 - 1972 | Ford | Galaxie 500 | 302/5 V8 | |
| 1965 | Ford | Falcon Sedan Delivery | 289/4.7 V8 | |
| 1963 - 1964 | Ford | Galaxie | 260/4.3 V8 | |
| 1972 - 1974 | Ford | Gran Torino | 302/5 V8 | |
| 1965 - 1967 | Ford | LTD | 289/4.7 V8 | |
| 1964 | Ford | Mustang | 260/4.3 V8 |
Specs:
| Brand | Mr. Gasket |
|---|---|
| Emission Code | 5 |
| Engine | Ford Small Block Windsor |
| Material | Silicone |
| Product Type | Rear Main Seal |
| Rear Main Seal Style | Two Piece |
| Warranty | Limited 90 Day |
| Weight | 0.15 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 1004 reviews
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Product Reviews
★★★★★ 5
Flat tire… try this.
Size: 1 Gallon + Tool, Set name: Small Tire/Bicycle Formula
For husband, that’s what he puts in our tires great price and works well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
★★★★★ 5
Go Ridding and Go Flatless with QuickStrike tire sealent
Size: 1 Gallon + Tool, Set name: Off-Road Formula
I’ve tried several tire sealants over the years on my ebikes and scooters, but FlatOut QuickStrike is by far the best I’ve used. From the moment I added it to my bike tires, I noticed a difference—it’s incredibly easy to install, and you don’t have to convert to tubeless to benefit from its protection. The formula is thin and spreads quickly, sealing punctures almost instantly so you don’t lose much air.
What I feel that really stands out is how effective it is. I ride my ebikes through rough terrain with lots of thorns and debris, and since using FlatOut QuickStrike, I haven’t had a single flat ( unlike before ). Even when I’ve picked up multiple punctures, the sealant has handled them all without a problem. I feel that the peace of mind it gives me is priceless, especially on long rides or commutes where a flat could ruin your day ( and It has in the past ).
Another big plus is that it’s a one-time application—it won’t dry out or turn into a mess inside your tire ( like that Green Stuff ). It’s also safe for both tubes and tubeless setups, and works well in my 20 inch and 14 inch tires. I’ve used it on my ebikes and scooters and the results have been consistently impressive.
Make me feel confident of the durability of my tires on my ride. I bought the gallon bottle because I have a few ebikes and scooters. this stuff works great!
If you want to spend less time fixing flats and more time enjoying your ride, this is the sealant to get. Highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 14, 2025
★★★★★ 5
Fat tire savior
Size: 1 Gallon + Tool, Set name: Off-Road Formula
The best fat tire and dirtbike sealant we have found and love the gallon size. Pump clogs but clears with a strong push and love that it is water cleanup.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
★★★★★ 5
Worked perfectly for me. Sorry I waited so long.
Size: 1 Gallon + Tool, Set name: Off-Road Formula
I was clearing a field full of mesquite trees, and my tractor tires were getting destroyed. Mesquite has nasty 3-inch thorns, and I was plugging tires constantly. Eventually, all four tires were flat at the start of each day. These tires had been plugged more than 10 times each.
I bought FlatOut Quick Strike and followed the instructions exactly. The pump dispenses about 1 oz per pump, so I put 30 pumps in each tire, and the bottle was mostly empty by the time I finished. Typical with any pump dispenser it was also difficult to get the last bit out of the bottle using the pump.
It’s been a week now. One tire has lost about 1 PSI, but the other three are still holding exactly where I set them.
Considering how badly these tires were damaged, I’m impressed so far. This is the first time I’ve gone more than a day without dealing with flats in that field.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 13, 2026
★★★★★ 4
Pump is worthless
Size: 1 Gallon + Tool, Set name: Small Tire/Bicycle Formula
The sealant is good. The gallon pump is a joke. Pump stopped working 4 pumps in. Went and got another replacement pump from automotive store, also broke after 4 pumps. Ended up cleaning out an old Slime bottle and pouring in the flat out sealant in the slime bottle, so I could actually get it in my tires.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026