Welcome to RX Auto. Makers of Thermagasket Industrial Head and Block Sealant

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Block Test Kit

You can see it locate combustion leaks
without guess work! Tests in seconds for:

When fluid turns from BLUE to YELLOW,
a combustion leak is present

This item cannot be returned for refund.
If you need further assistance call 1-866-780-9042

Block Test Kit for U.S $69.95
Includes Shipping

Block Test Kit Shipping Outside
United States
$99.95

Block Test Fluid

16 oz. Bottle of Block Test fluid

Replacement Fluid For Above Block Test Kit

Due to shipping expense this item cannot be shipped outside the US

This item cannot be returned for refund.
If you need further assistance call 1-866-780-9042

Block Test Fluid for U.S. $12.95

Shipping & Handling, Flush Kits, Tools, Crankcase & Cooling System Cleaners are non refundable.