Foam Casting Compounds

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11 Products


Compound expands to fill every hole and cavity.

Create lightweight molds with these two-part compounds. They expand as foam after they’re poured to fill every cavity. The denser the foam, the less it will expand. Before casting, apply petroleum jelly (not included) to prevent sticking, stretching, and tearing. It won't cause the foam to collapse as it cures.

Flexible—Flexible compounds cure into soft, open-cell foam, which absorbs water, air, and gases. They are often used to cast gaskets, cushions, and other bendable objects.

Rigid—Rigid compounds form stiff, closed-cell foam, which prevents water and air from flowing through the part. Machinable, they’re dense enough to create prototype modeling blocks, so you can test setups without wearing down tools.

	Density, lb/ft³	Time to Cure, min.	Time to Demold, min.	Cure Temp., ° F	Max. Temp., ° F	Shrinkage	Color	Mixing Req.	Wt., lb.		Each
Polyurethane Foam



	White

		Flexible—Not Machinable
		4X	12	3	25	25	80	125	Not Rated	White	Yes	3	00000000	000000
		4X	12	3	25	25	80	125	Not Rated	White	Yes	12	0000000	000000
		8X	8	3	25	25	80	125	Not Rated	White	Yes	3	00000000	00000
		8X	8	3	25	25	80	125	Not Rated	White	Yes	12	0000000	000000
		15X	4	3	25	25	80	125	Not Rated	White	Yes	3	00000000	00000
		15X	4	3	25	25	80	125	Not Rated	White	Yes	12	0000000	000000

		Beige

				Rigid—Machinable
				2X	20	3	15	15	75	85	Not Rated	Beige	Yes	16	0000000	000000
				7X	12	3	15	15	75	85	Not Rated	Beige	Yes	4	00000000	00000
				7X	12	3	15	15	75	85	Not Rated	Beige	Yes	16	0000000	000000
				19X	4	3	15	15	75	85	Not Rated	Beige	Yes	4	00000000	00000
				19X	4	3	15	15	75	85	Not Rated	Beige	Yes	16	0000000	000000