E36952 Sealants | McMaster-Carr

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7 Products

Silicone Rubber Sealants

Made from silicone rubber, these sealants are RTV (room-temperature vulcanizing). They’re non-sagging, so they won't drip from vertical and overhead surfaces.

Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. Sealants that are good for joining dissimilar materials also work well in environments with wide temperature fluctuation.

Momentive Silicone Rubber


Cartridge	Tube	Syringe

	Joint Compression/Expansion Tolerance	Hardness Rating	Temp. Range, ° F	For Joining	Food Industry Std.	Flammability Rating	Mil. Spec.	Color (Clarity)		Each
2.8 fl. oz. Tube







	24 hr. Reaches Full Strength

	RTV106	15	400%	-25% to 25%	Soft (Durometer 30A)	-55 to 400	Glass Masonry Metal Plastic Rubber Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	FDA Compliant 21 CFR 177.2600 NSF/ANSI 51	—	MIL-A-46106 Group III Type I	Red (Opaque)	74975A53	000000


	5.4 fl. oz. Cartridge







					24 hr. Reaches Full Strength

					RTV106	15	400%	-25% to 25%	Soft (Durometer 30A)	-55 to 400	Glass Masonry Metal Plastic Rubber Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	FDA Compliant 21 CFR 177.2600 NSF/ANSI 51	—	MIL-A-46106 Group III Type I	Red (Opaque)	7545A302	000000


					10.1 fl. oz. Cartridge







									24 hr. Reaches Full Strength

									RTV106	15	400%	-25% to 25%	Soft (Durometer 30A)	-55 to 400	Glass Masonry Metal Plastic Rubber Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	FDA Compliant 21 CFR 177.2600 NSF/ANSI 51	—	MIL-A-46106 Group III Type I	Red (Opaque)	74975A56	00000


									13.5 fl. oz. Syringe







													24 hr. Reaches Full Strength

													RTV230 A/B	5	280%	-25% to 25%	Soft (Durometer 36A)	-55 to 400	Glass Masonry Metal Plastic Rubber Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	—	UL 94 HB	—	White (Opaque)	7545A301	000000

Self-Leveling Silicone Rubber Sealants


Cartridge	Tube

Thinner than non-sagging sealants, these flow easily into cracks and have a smooth finish. Made from silicone rubber, sealants are RTV (room-temperature vulcanizing).

		Container								Temp., ° F
	Mfr. Model No.	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength, psi	Hardness Rating	Min.	Max.	For Joining	Color (Clarity)		Each
Momentive Silicone Rubber



		RTV116	10.1	Cartridge	30	3 day	350%	-25% to 25%	350	Soft (Durometer 20A)	-75	500	Glass Metal Plastic Rubber Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	Red (Opaque)	6604A11	0000000


		RTV118	2.8	Tube	20	24 hr.	325%	Not Rated	325	Soft (Durometer 25A)	-75	400	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	Clear (Semi-Clear)	6604A36	00000

Ready-to-Use Silicone Rubber Potting Compounds

No mixing required—these potting compounds come ready to apply. Use them to encase electronic assemblies for protection from dust, moisture, mechanical shock, and vibration. Softer and more flexible than epoxies and urethanes with the widest temperature range, silicone rubber potting compounds are the best choice for high-temperature applications and electronics exposed to thermal cycling. They have good moisture resistance but poor chemical and abrasion resistance. Silicones provide excellent electrical insulation. They're also known as RTV (room-temperature vulcanizing) compounds because they don’t need heat or UV light to cure.

Cannot Be Sold to Canada—Potting compounds that cannot be sold to Canada are restricted by product labeling requirements.

	Container			Dry Time
	Size, fl. oz.	Type	Consistency	Touch, min.	Overall, hr.	Dielectric Strength, V/mil	Thermal Conductivity, W/(m⋅°C)	Temp. Range, ° F	Flammability Rating	For Use On	Color	Clarity	Cannot Be Sold To		Each
Compounds—Soft



		3	Tube	Paste	15	24	425	0.06	-75 to 400	UL 94 HB	Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Plastic, Ceramic, Glass	Clear	Clear	Canada	1832A111	000000