--- product_id: 82132425 title: "ST3501 Pour & Go Head Gasket Sealer, 16 oz – Repairs Blown Head Gaskets, Cracked Heads & Engine Blocks" brand: "k-seal" price: "R950" currency: ZAR in_stock: true reviews_count: 13 category: "K Seal" url: https://www.desertcart.co.za/products/82132425-st3501-pour-and-go-head-gasket-sealer-16-oz-repairs store_origin: ZA region: South Africa --- # Compatible with all coolants & engines 33% more sealing power Seals leaks up to 0.64mm ST3501 Pour & Go Head Gasket Sealer, 16 oz – Repairs Blown Head Gaskets, Cracked Heads & Engine Blocks **Brand:** k-seal **Price:** R950 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Seal the deal before your engine feels it! ## Quick Answers - **What is this?** ST3501 Pour & Go Head Gasket Sealer, 16 oz – Repairs Blown Head Gaskets, Cracked Heads & Engine Blocks by k-seal - **How much does it cost?** R950 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/82132425-st3501-pour-and-go-head-gasket-sealer-16-oz-repairs) ## Best For - k-seal enthusiasts ## Why This Product - Trusted k-seal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **No Engine Downtime:** Pour & Go design means quick, hassle-free application without engine disassembly. - β€’ **Trusted by Millions:** Over 8 million bottles sold worldwideβ€”join the community of savvy car savers. - β€’ **One Step to Leak-Free:** Unique ceramic micro-fibres seal cracks and holes up to 0.64mm effortlessly. - β€’ **Universal Engine Ally:** Works seamlessly with all coolant types and engine materials, including heavy-duty machinery. - β€’ **Fix It Fast, Drive Faster:** Advanced formula delivers 33% more sealing power for long-lasting repairs. ## Overview K-Seal ST3501 is a powerful 16 oz head gasket sealer that repairs blown head gaskets, cracked heads, and porous engine blocks. Featuring 33% more sealing power and ceramic micro-fibres, it seals leaks up to 0.64mm in one easy step. Compatible with all coolant types and engine materials, it’s trusted globally with over 8 million bottles sold, offering a fast, reliable fix to keep your engine running smoothly. ## Description Buy K-Seal ST3501 Pour & Go Head Gasket Sealer, 16 oz – Repairs Blown Head Gaskets, Cracked Heads & Engine Blocks: Cooling System - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: IT ACTUALLY WORKED ! - It took about two weeks but it finally sealed the Head Gasket on my daughters 1998 3.8 liter Mustang. It did not damage the heater core or thermostat. I kept in contact with the manufacturer on the proper way to repair this head gasket. I was also told that I can flush the cooling system if I so choose and that it would not affect the repair. Money well spent! Review: Worked on Chevy 5.7 - Had bad coolant blowing out the exhaust on my 1989 Chevy 5.7 K1500 111k miles. Not just steam but coolant as well. Used K Seal and it did not work. So pulled heads sent to machine shop that checked them and said no faults found. Heads milled, inspected cylinders, nothing found. In fact old cylinder head gaskets and intake gaskets were okay. Re-assembly did not touch the exhaust. Just as bad. I again used K Seal. Forget the 3-5 minute idle, did not work. So allowed it to cold soak overnight. Next day ran it on the road with it blowing steam all the way. Let it cold soak overnight. Next day leak was gone. Went for drive and no smoke. Mind you this was just day one, but given the severity of the leak, this looks promising. Still not sure why it worked on the second can and not the first. I lost a lot of coolant when I pulled the heads, but it is possible enough residue of the first can of K Seal remained. My current thinking is that the problem may be a crack in the intake manifold and not the block. This is because the engine did not blow coolant before I changed the intake manifold gaskets a few weeks prior just as routine maintenance. The manifold EGR passage was totally clogged with carbon which I removed. It is possible this carbon may have sealed the crack in the manifold. Chevy manifolds have massive exhaust and coolant passages that run parallel to each other and a defective EGR system could generate excessive heat that cracks the manifold internally. This would allow coolant to get into the exhaust. ## Features - FIX IT FAST: Our advanced formula with 33% more sealing power than regular K-Seal, ensures a long-lasting, seal for challenging leaks. Fixes blown head gaskets, cracked heads & porous engine blocks in cars - STOP HOLES & CRACKS: With just 1 step our unique formula with ceramic micro-fibres, will seal leaks up to 0.64mm in size, without any adverse impact on the engine - VERSATILE COMPATIBILITY: Works with all types of coolant & compatible with a wide range of vehicle engine materials & heavy duty machinery. - Attention: If you notice bubbles coming from the radiator or coolant reservoir, or if K-Seal engine coolant stop leak is not sealing, the system might be over-pressurized. Refer to the Technical Specification section of this page for additional instructions to ensure a successful repair. Over 8 million bottles sold worldwide! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00QYZIVA6 | | Best Sellers Rank | #10,641 in Automotive ( See Top 100 in Automotive ) #5 in Cooling System Additives | | Brand | K-Seal | | Customer Reviews | 4.2 4.2 out of 5 stars (2,124) | | Date First Available | November 14, 2014 | | Is Discontinued By Manufacturer | No | | Item Weight | 1 pounds | | Item model number | KSLST3501 | | Manufacturer | Solv-Tec | | Manufacturer Part Number | KSLST3501 | | Model | ST3501 | | Product Dimensions | 2.5 x 2.5 x 8 inches | ## Images ![ST3501 Pour & Go Head Gasket Sealer, 16 oz – Repairs Blown Head Gaskets, Cracked Heads & Engine Blocks - Image 1](https://m.media-amazon.com/images/I/71G2FkNC+6L.jpg) ## Questions & Answers **Q: Is it okay to continue to idle the car with engine and brake lights on with liquid coming out of radiator? It says to idle for 20 minutes** A: The system should be sealed as the product circulates though it for the 20 minutes. **Q: Does it use Sodium Silicate?** A: Nowhere on the bottle does it say sodium silicate. **Q: I have a 1999 ford ranger. running fine now but it is getting older. can i use this as a preventative? or do i need to wait for a problem to show up?** A: The way K seal works is by seeking out leaks in a pressurized system. I feel you or best bet would be to wait until you know your leaking coolant. I use this in a truck about 7 months ago and I still have no problems with the truck. Work very well **Q: can i make a 100 make a 100 mile trip 10 minuets after i put the k-seal in...** A: Yes! It does it's magic within 10 minutes. Just don't drive it too hard for about 20 minutes. Drive smooth. Highway driving or a good road with a consistent speed is best. After 20 minutes, you are all good! ## Customer Reviews ### ⭐⭐⭐⭐⭐ IT ACTUALLY WORKED ! *by M***N on June 5, 2026* It took about two weeks but it finally sealed the Head Gasket on my daughters 1998 3.8 liter Mustang. It did not damage the heater core or thermostat. I kept in contact with the manufacturer on the proper way to repair this head gasket. I was also told that I can flush the cooling system if I so choose and that it would not affect the repair. Money well spent! ### ⭐⭐⭐⭐⭐ Worked on Chevy 5.7 *by L***. on July 4, 2024* Had bad coolant blowing out the exhaust on my 1989 Chevy 5.7 K1500 111k miles. Not just steam but coolant as well. Used K Seal and it did not work. So pulled heads sent to machine shop that checked them and said no faults found. Heads milled, inspected cylinders, nothing found. In fact old cylinder head gaskets and intake gaskets were okay. Re-assembly did not touch the exhaust. Just as bad. I again used K Seal. Forget the 3-5 minute idle, did not work. So allowed it to cold soak overnight. Next day ran it on the road with it blowing steam all the way. Let it cold soak overnight. Next day leak was gone. Went for drive and no smoke. Mind you this was just day one, but given the severity of the leak, this looks promising. Still not sure why it worked on the second can and not the first. I lost a lot of coolant when I pulled the heads, but it is possible enough residue of the first can of K Seal remained. My current thinking is that the problem may be a crack in the intake manifold and not the block. This is because the engine did not blow coolant before I changed the intake manifold gaskets a few weeks prior just as routine maintenance. The manifold EGR passage was totally clogged with carbon which I removed. It is possible this carbon may have sealed the crack in the manifold. Chevy manifolds have massive exhaust and coolant passages that run parallel to each other and a defective EGR system could generate excessive heat that cracks the manifold internally. This would allow coolant to get into the exhaust. ### ⭐⭐⭐⭐⭐ Improved my old car's performance greatly! *by T***S on June 25, 2025* Have a 2004 Ford Escape with about 200,000 miles. Started getting a check engine light; misfire on #1 at startup and very rough idling every time I started the (cold) engine in the morning until it warmed up. Tried the usual; plugs and ignition coils but no help. Noticed I was using water but no sign of a leak. Finally suspected that I had a blown head gasket around #1 cylinder. Read good reviews about K-Seal so thought I'd give it a try and poured a 16oz bottle in. Drove it around for about 20 miles then parked it till next morning. Started it up and no check engine light and the idling was much improved (but not great)! I left the K-seal in and now, about 3 weeks later, have not had a check engine light again and the idling has improved steadily until I can say it is now very smooth at startup and when stopped in traffic. I think by leaving the K-Seal in that the gasket leak has steadily improved and so has the engine performance. Thank you K-Seal! ## Frequently Bought Together - K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks - K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required - K-Seal ST5516 Heavy-Duty Multi-Purpose One Step Permanent Coolant Leak Repair, 16 oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/82132425-st3501-pour-and-go-head-gasket-sealer-16-oz-repairs](https://www.desertcart.co.za/products/82132425-st3501-pour-and-go-head-gasket-sealer-16-oz-repairs) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-28*