Butyl Mastic Sealants | McMaster-Carr

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5 Products

Non-Hardening Caulk

Also known as thumb-grade caulk, this forms a non-hardening, moisture-resistant seal that remains pliable.

Butyl Mastic Strip

Image of Product. Front orientation. Butyl Mastic. Non-Hardening Caulk.

Butyl mastic has a clay-like consistency.

							Brown		Gray
Dia.	Lg., ft.	Tensile Strength	Hardness Rating	Temp. Range, ° F	For Joining	No. of Pieces		Each		Each
1/8"	30	Not Rated	Not Rated	-30 to 150	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	8	———	0	9408T146	00000
1/8"	45	Not Rated	Not Rated	-30 to 150	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	8	9408T144	00000	9408T17	0000
1/8"	90	Not Rated	Not Rated	-30 to 150	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	8	9408T145	0000	9408T14	0000