1. K&W Permanent Metallic ® Block Seal
Block and Radiator Seal
Permanently seals small holes and cracks, repairing:
Engine blocks
Cylinder heads
Radiators
Heater cores
Cooling passages
Head gaskets
Water Jackets

2. K&W Permanent Metallic ® Block Seal
Block Seal seeks out cracks or small holes in the engine block, radiator, head gasket, freeze plugs and heater core.

3. K&W Permanent Metallic ® Block Seal
Once the crack or hole is located, Block Seal, mixed with water, is forced in from the pressure of the cooling system.
Block Seal is hardened as oxygen passes over the crack forming a permanent molecular bond that’s as strong as steel.

4. K&W Permanent Metallic ® Block Seal
How to Use:
Example:
1985 Ford Fairmont
3.8L V-6
136K Miles
The Problem Internal coolant leak
Diagnosis Cracked head gasket
Mechanic’s Estimates $800 - $1,400
Alternate Repair Method Treat with K&W Block Seal

5. K&W Permanent Metallic ® Block Seal
Preparation
Park vehicle in a spot where it can sit for at least 24 hours.
Products needed: Block Seal, Radiator Flush and Radiator Anti-Rust.
Other products & tools required: Antifreeze, drain pan and basic hand tools.

6. Block Seal Step 1 Drain antifreeze into drain pan
Block Seal cannot be added to coolant because it will solidify.
Tip:
If you plan on reusing current antifreeze, drain into a clean pan.
It is suggested that you use new antifreeze.

7. Block Seal Step 2 Flush cooling system
Why? To remove scale, rust and corrosion. This will aid the sealing process and clean the cooling system.
Tip: Using a “back-flush” kit is the most effective method of flushing.

8. Block Seal Step 2 (repeat)
Flush, Flush, Flush!
This may be the most important step. Flush the cooling system until the water is clear and there is no antifreeze present.
Turn on the heater and defroster while vehicle is running. This will ensure that the thermostat is open resulting in faster warm-up time. If possible, remove the thermostat and replace after leak has been repaired.
Tip: If you are experiencing an internal coolant leak (compression leak), remove and check spark plugs for corrosion or fluid appearance. You may also run a compression test. Upon determining the affected cylinder(s) remove the spark plug and disable the fuel injection before the next step.

9. Block Seal Step 3 Mix Block Seal with water
In a separate container, mix entire can of Block Seal with 3 quarts of clean warm tap water. Shake/mix the solution before adding to the empty cooling system. (Can may be pressurized, hold away from face when opening)
Use a clean plastic milk jug or other container to mix Block Seal and water.

10. Block Seal Step 4 Add Block Seal mixture
Pour entire Block Seal mixture into cooling system.
Immediately start the vehicle, top-off with water, replace the radiator cap and let the vehicle idle for a minimum of 20 to 30 minutes. If vehicle overheats, turn off vehicle and let temperature return to normal before restarting for remaining time frame.
Tip: If the thermostat has not been removed, turning on the heat and defrost will ensure the thermostat opens

11. Block Seal Step 5 Let vehicle cool
After vehicle is cool, remove radiator cap and drain cooling system
Tip: There is not a specific time frame for cooling. You may drain cooling system when you feel comfortable removing the fluid.

12. Block Seal Step 6 Drain and Cure
Remove radiator cap and open all drain cocks to allow air to circulate in the cooling system. Removing the lower radiator hose will help in allowing more air into the coolant system
Let empty cooling system dry for a minimum of 24 hours.
Tip: Block Seal needs air to cure and form a permanent bond, the longer it can dry the better the adhesion.

13. Block Seal Step 7 Flush and Add coolant
After drying time has elapsed, flush coolant system until clear and fill with a 50/50 mix of antifreeze & water (You may add anti-rust or other additives if desired).
Let vehicle idle until hot.
The leak has been repaired.
Reinstall thermostat if it was removed during the process.
Change oil and filter if oil is contaminated. A engine oil flush is recommended if the oil is extremely dirty.
Check coolant level frequently over the next 100 miles.

14. Results SAVINGS $774 TO $1,374!!!! LEAK REPAIRED! Cost Retail
K&W Block Seal $6.69
CRC Radiator Flush $1.99
Antifreeze (x2) $9.98
CRC Anti-Rust $1.99
Drain Pan $4.99
Total $25.64
Estimate to repair vehicle $800 to $1,400
SAVINGS $774 TO $1,374!!!!

15. Block Seal Competitors
Most brands use “wood flour dust” to form a soft, temporary seal.
While the coolant - filled with wood pulp - is under pressure, the pulp seals the crack. But what happens when you change your coolant?
K&W Block Seal does not rely on cooling system pressure to maintain a seal. It actually repairs cracks and small holes in your system.

16. Gunk vs. Block Seal Results… Gunk not dry within 24 hours
36 Hours Later!
Poured Equal Amounts
Results…
Gunk not dry within 24 hours
Block Seal – 100% dry in 24 hours
Gunk carrier solution evaporates — left with little bonding material
Block Seal maintains original mass — left with solid bonding material
Gunk dries unevenly and becomes brittle
Block Seal dries smooth and strong