RTV108 Sealants | McMaster-Carr

Made from silicone, 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.

	Container
Mfr. Model No.	Size, fl. oz.	Type	Begins to Harden	Reaches Full Strength	Elongation	Joint Compression/ Expansion Tolerance	Hardness	Temp. Range, °F	For Joining	Specifications Met	Clarity	Color		Each
Momentive/GE Silicone
RTV108	2.8	Tube	15 min.	24 hrs.	450%	Not Rated	Soft (Durometer 30A)	-75° to 400°	Metal Metal to Plastic Metal to Rubber Metal to Glass Plastic Plastic to Rubber Plastic to Glass Rubber Rubber to Glass Glass Masonry Wood	FDA Compliant 21 CFR 177.2600, MIL-A-46106 Group I Type I, MIL-A-46106 Group III Type I, NSF/ANSI 51, UL Recognized Component	Semi-Clear	White	00000000	000000
RTV108	10.1	Cartridge	15 min.	24 hrs.	450%	Not Rated	Soft (Durometer 30A)	-75° to 400°	Metal Metal to Plastic Metal to Rubber Metal to Glass Plastic Plastic to Rubber Plastic to Glass Rubber Rubber to Glass Glass Masonry Wood	FDA Compliant 21 CFR 177.2600, MIL-A-46106 Group I Type I, MIL-A-46106 Group III Type I, NSF/ANSI 51, UL Recognized Component	Semi-Clear	White	00000000	00000

Silicone Sealants with Material Certification

These sealants include a material certificate with traceable lot number, test report, and product shelf life. They’re non-sagging, so they won't drip from vertical and overhead surfaces. Made from silicone, sealants are RTV (room-temperature vulcanizing).

Elongation indicates flexibility—the higher the value is, the more a sealant can stretch. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation.

	Container
Mfr. Model No.	Size, fl. oz.	Type	Begins to Harden	Reaches Full Strength	Elongation	Tensile Strength, psi	Hardness	Temp. Range, °F	Specifications Met	For Joining	Clarity	Color		Each
Momentive/GE Silicone
RTV108	2.8	Tube	15 min.	24 hrs.	450%	400	Soft (Durometer 30A)	-75° to 400°	FDA Compliant 21 CFR 177.2600, MIL-A-46106 Group I Type I, NSF/ANSI 51, UL Recognized Component	Metal Metal to Plastic Metal to Rubber Metal to Glass Plastic Plastic to Rubber Plastic to Glass Rubber Rubber to Glass Glass Masonry Wood	Semi-Clear	White	00000000	000000
RTV108	10.1	Cartridge	15 min.	24 hrs.	450%	400	Soft (Durometer 30A)	-75° to 400°	FDA Compliant 21 CFR 177.2600, MIL-A-46106 Group I Type I, NSF/ANSI 51, UL Recognized Component	Metal Metal to Plastic Metal to Rubber Metal to Glass Plastic Plastic to Rubber Plastic to Glass Rubber Rubber to Glass Glass Masonry Wood	Semi-Clear	White	00000000	00000