Vacuum Leak Sealants

Filter by

Container Type

For Use On

For Joining

Formulation

Material

Performance

Reaches Full Strength

1 hr.

3 day

7 day

Maximum Vacuum @ Temperature

1× 10^-9 Torr @ 72° F

1× 10^-4 Torr @ 72° F

Minimum Temperature

Maximum Temperature

Color

Relative Vacuum Rating

Begins to Harden

Hardness

Paintable

Tensile Strength

Hardness Rating

Container Size

RoHS

Mixing Required

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

For Use Outdoors

Elongation

7 Products

About Sealants

Select a sealant that can stretch, contract, and expand enough for your joints.

Seal leaks on vacuum systems and components.

Sealants


Dispensing Guns	Cartridge	Tube	Can

Epoxy Resin—Epoxy resin sealants, also known as Torr Seals, form a rigid bond.

Bentonite/Petrolatum—Bentonite/petrolatum sealants, also known as Apiezon sealants, form a flexible, non-hardening seal that’s easy to remove and reposition.

	Container
	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength	Relative Vacuum Rating	Max. Vacuum @ Temp.	Tensile Strength	Hardness Rating	Mix Ratio	Temp. Range, ° F	For Joining	Color		Each
Epoxy Resin



		1.7	Cartridge	60	3 day	Ultra High	1× 10^-9 Torr @ 72° F	5,000 psi	Extra Hard (Durometer 75D)	2:1	-45 to 245	Glass Masonry Metal	Off-White	4852N14	0000000


		4.2	Tube	60	3 day	Ultra High	1× 10^-9 Torr @ 72° F	5,000 psi	Extra Hard (Durometer 75D)	2:1	-45 to 245	Glass Masonry Metal	Off-White	1887N11	000000


		Bentonite/Petrolatum



				—	Can	5	1 hr.	High	1× 10^-4 Torr @ 72° F	Not Rated	Not Rated	—	15 to 85	Glass Metal Plastic	Gray	4852N11	000000

Dispensing Guns

Loading Method	For Cartridge Size, fl. oz.	Material		Each
Cartridge	1.7	Plastic	4852N13	0000000

Sealants with 3 Mixers and Dispensing Gun

Cartridge

Epoxy Resin—Epoxy resin sealants, also known as Torr Seals, form a rigid bond.

	Container
	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, day	Relative Vacuum Rating	Max. Vacuum @ Temp.	Tensile Strength, psi	Hardness Rating	Mix Ratio	Temp. Range, ° F	For Joining	Color		Each
Epoxy Resin



		1.7	Cartridge	60	3	Ultra High	1× 10^-9 Torr @ 72° F	5,000	Extra Hard (Durometer 75D)	2:1	-45 to 245	Glass Masonry Metal	Off-White	4852N12	0000000

Low-Outgassing Silicone Rubber Sealants


Cartridge	Tube

Tested to meet ASTM E595, a standard used by NASA, these sealants fill joints and seams while releasing almost no volatile emissions that could damage sensitive electronics, even in a vacuum. Made of silicone rubber, they’re RTV (room-temperature vulcanizing), so they’ll fully harden at room temperature.

Elongation indicates flexibility—the higher the value is, the more a sealant can stretch.

Begins to Harden in 26 min.—Sealants that begin to harden in 26 min. are less likely to trap contaminants than those that take longer to harden.

Container
Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, day	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength, psi	Hardness Rating	Temp. Range, ° F	Specs. Met	For Joining	Color		Each
5	Tube	26	3	610%	Not Rated	925	Medium Soft (Durometer 41A)	-45 to 390	ASTM E595	Glass Masonry Metal Plastic Rubber	Clear	4842N12	000000000
5.8	Cartridge	150	7	420%	-25% to 25%	600	Medium Soft (Durometer 36A)	-200 to 500	ASTM E595	Composite Glass Metal Plastic Rubber	White	4842N11	000000