Moroso 35571 - Eng. Block Filler, 1 Gal

Engine Block Filler 1-Gallon Container • Just fill with water, mix and pour into block before machining • Helps prevent thin cylinder walls from cracking and improves ring seal by keeping cylinders round • Also dampens unwanted vibrations • Has expansion rate very similar to cast-iron • Highly regarded by "Mountain Motor" authority Scott Shafiroff • Easy to follow, detailed instructions