NOTE: You must have cookies enabled before purchasing products online.
Please enable cookies in your browser settings and refresh this page.

< Return to Product Listings

Engine Block Sealant

Price/Option: Quantity:

Envirosafe Engine Block Sealant Photo - Click to Enlarge

Enviro-Safe Engine Block Sealant will repair most blown engine head gaskets and minor cracks in the engine block when used according to directions. Engine Block Sealant does not harm coolant systems or aluminum or steel engine parts and it will stop leaks in minutes. This 32 oz container is enough for 1 automobile or small truck diesel engine. 

For best results, add to radiator after mixing with anti-freeze.

For larger systems, please contact Enviro-Safe Technical Support at: 
1- 888-913-1110.

For Professional Use Only

1. Turn heater on.

2. Completely drain and flush cooling system.

3. Remove thermostat.

4. Add Engine Block Sealant and fill with water.

5. Run engine with radiator cap off until engine is at normal operating temperature.

6. Fill radiator completely with water, then replace cap.

7. Allow engine to run additional 20-30 minutes.

8. Drain radiator only and save mixture.

9. Replace the thermostat.

10. Insall antifreeze.

11. Use saved mixture to top off the system.

Caution: ​In case of eye contact flush immediately with running water. Contact your physician. DO NOT ingest. If swallowed, DO NOT induce vomiting. Seek immediate medical assiastance.

​Keep out of children's reach.

Customers Also Bought:

A/C Copper Tubing Coupling - Click to Purchase

A/C Copper Tubing Coupling

Available in 3/4", 3/8", and 7/8".

Price/Option: Quantity:

Transmission Plus - Click to Purchase

Transmission Plus

Transmission Plus is a state-of-the-art conditioner and stop leak in one.

Price/Option: Quantity:

Oil Charge 3 for R22, R12, R134a - Click to Purchase

Oil Charge 3 for R22, R12, R134a

A blend of selected oils that have been formulated to provide the extra oil needed when an air conditioning unit loses the oil charge due to leaks or malfunctions in the system.

Price/Option: Quantity:

Newsletter Signup: