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<h4 class="dechead">On One Hand: Temporary Solution
According to reviews on CadillacForums.Com, Coolant System Seal Tabs (otherwise known as coolant pellets) work if used in moderation. MyAutoRepairService.Com reports that instant radiator repair sealant may work as a temporary solution in an extreme emergency.
On the Other: Congestion Likely
According to Radiator.Com, commercial radiator sealants will clog your radiator, impeding the flow of coolant in the radiator core and degrading the water pump seals. And while MyAutoRepairService.Com concedes instant radiator repair sealants may work as a temporary solution, they do not recommend using them.
Bottom Line
While instant radiator repair sealant might work as a temporary fix---in the case of extreme emergencies---it may also congest your radiator causing irreparable damage to the internal parts and costing you money. A better temporary fix may be to continually add radiator fluid or water to your radiator until you can have your radiator properly repaired.
Source:
MyAutoRepairAdvice.Com: Should I Try Radiator Repair Myself?
CadillacForums.Com: Everything You Ever Wanted to Know About Coolant
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