Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz.

Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz.

Q: After you use it you have to change the motor oil my oil look like milk ?

A water cooling system leak into the interior of the engine mixing with the oil lubricating system produces a yellowish off white foam. Either a cracked block or head or a leaking head gasket are the usual suspect for this. I even have had a badly leaking cooling tube under the intake manifold on a 4.6 Liter Ford that no coolant leak additive could fix--a removal of intake manifold and replacement of tube was the only fix. It is very common for Aluminum head/block warpage due to even a one time overheating to cause head gasket leakage that only engine teardown and having the warp leveled can fix. For reasonably small leaks, I have used radiator sealer to stop them.

Q: Do you have to flush the radiator first?

Yes, I would flush it first, then add the installation seal.

Q: Does it says for how many cylinders it will work per .oz used

Didn't work on 6 cylinder for me.

Q: Will this work on a cracked block and water cooled manifold in a closed Mercruiser 5.7 liter V8 boat engine? Thanks.

It depends on how big the crack is. If very big probely not. My experience with with water manifold not likely.

3.7/5

Product ID: 17490174

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Details

Material
Plastic
Brand
Hi-Gear
Style
Liquid and
Item Weight
0.6 Pounds
Item dimensions L x W x H
2.25 x 2.25 x

💧Compatible with all antifreeze types, no draining needed

🔥Heat-activated ceramic & copper micro-fiber weld

🛠️Permanently seals leaks in multiple engine parts

Frequently Bought Together

Hi-Gear HG9048s Insta-Seal Permanent Block Sealer - 8 fl. oz.

K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

K-Seal ST3501 Pour and Go Head Gasket Sealer, 16oz, Permanent Repair for Blown Head Gaskets, Cracked Heads and Blocks

Description

🛡️ Seal it once, drive forever—no leaks, no limits!

ENGINE HEAT ACTIVATED - Uses your engine’s heat to permanently weld and strengthen the seal
INSTANT LEAK LOCKDOWN - Seals cracks and holes in seconds for lasting engine protection
WARRANTY SAFE FORMULA - Repairs without risking your manufacturer’s warranty—drive worry-free
MULTI MATERIAL MASTERY - Effective on plastic, aluminum, cast iron, and ceramic engine components
UNIVERSAL COOLANT COMPATIBILITY - Works flawlessly with all glycol-based antifreeze formulas

Hi-Gear HG9048s Insta-Seal is an 8 fl. oz. liquid sealant that permanently repairs leaks in gaskets, radiators, heater cores, intake manifolds, blocks, heads, and freeze plugs. It uses ceramic micro-fibers and copper activated by engine heat to weld cracks in plastic, aluminum, and cast iron components. Compatible with all types of antifreeze, it requires no draining and does not void manufacturer warranties, making it a reliable, hassle-free solution for both gasoline and diesel vehicles.

Specifications

Material	Plastic
Brand	Hi-Gear
Style	Liquid ceramic-microfiber and copper sealant
Item Weight	0.6 Pounds
Item dimensions L x W x H	2.25 x 2.25 x 7.13 inches
Compatible Material	Aluminum, Ceramic, Copper, Plastic
Water Resistance Level	Water Resistant
Item Form	Liquid
UPC	009603190484
Unit Count	8.0 Fluid Ounces
Global Trade Identification Number	00009603190484
Manufacturer	Hi-Gear
Model	HG9048s
Item Weight	9.6 ounces
Product Dimensions	2.25 x 2.25 x 7.13 inches
Item model number	HG9048s
Is Discontinued By Manufacturer	No
Manufacturer Part Number	HG9048s

Have a Question? See What Others Asked

After you use it you have to change the motor oil my oil look like milk ?

Do you have to flush the radiator first?

Does it says for how many cylinders it will work per .oz used

Will this work on a cracked block and water cooled manifold in a closed Mercruiser 5.7 liter V8 boat engine? Thanks.

Common Questions

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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The product exactly matches the description. Very satisfied with my purchase.

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