RTV118 Sealants | McMaster-Carr

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

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	Tensile Strength, psi	Hardness	Temp. Range, °F	For Joining	Color		Each
Momentive/GE Silicone
RTV118	2.8	Tube	20 min.	24 hrs.	325%	Not Rated	325	Soft (Durometer 25A)	-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	Clear	0000000	000000

Self-Leveling Silicone Sealants with Material Certification

These sealants include a material certificate with traceable lot number, test report, and product shelf life. Thinner than non-sagging sealants, these sealants flow easily into cracks and have a smooth finish. They’re also known as RTV (room-temperature vulcanizing).

Elongation indicates flexibility—the higher the value is, the more a sealant can stretch. These sealants are good for use between dissimilar materials and in environments with 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	Color		Each
Momentive/GE Silicone
RTV118	2.8	Tube	20 min.	24 hrs.	325%	325	Soft (Durometer 25A)	-75° to 400°	FDA Compliant 21 CFR 177.2600, MIL-A-46106 Group I Type II, 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	Clear	0000000	000000