ASTM C920 Type S Grade NS Class 25 Sealants

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FDA Compliant 21 CFR 177.2600

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29 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.

Rutland 500ºF RTV High Heat Silicone Sealant Silicone Rubber


Cartridge	Tube

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







	24 hr. Reaches Full Strength

	76	10	500%	Not Rated	Soft (Durometer 25A)	-70 to 500	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Rubber Rubber to Glass	FDA Compliant 21 CFR 177.2600 NSF/ANSI 51	MIL-A-46106 Group I Type I	ASTM C920 Type S Grade NS Class 25	Black (Opaque)	7425A305	000000


	10.3 fl. oz. Cartridge







					24 hr. Reaches Full Strength

					76	10	500%	Not Rated	Soft (Durometer 25A)	-70 to 500	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Rubber Rubber to Glass	FDA Compliant 21 CFR 177.2600 NSF/ANSI 51	MIL-A-46106 Group I Type I	ASTM C920 Type S Grade NS Class 25	Black (Opaque), Clear (Clear)	7425A308	00000

Silicone Rubber


Cartridge	Tube	Nozzle-Top Can

Cannot Be Sold Outside United States—Sealants that cannot be sold outside the United States are restricted due to chemical regulations and/or product labeling requirements.

	Hardness Rating	Temp. Range, ° F	For Joining	Food Industry Std.	Mil. Spec.	Specs. Met	Cannot Be Sold To	Choose a Color (Clarity)		Each
6 1/2 oz. Nozzle-Top Can







	24 hr. Reaches Full Strength

	10	400%	-25% to 25%	Soft (Durometer 25A)	-70 to 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	FDA Compliant 21 CFR 177.2600 NSF/ANSI 51	Fed. Spec. TT-S-00230 Fed. Spec. TT-S-001543 MIL-A-46106 Type I	ASTM C920 Type S Grade NS Class 25	Outside United States	White (Opaque)	75075A69	000000


	2.8 fl. oz. Tube







					24 hr. Reaches Full Strength

					10	500%	-25% to 25%	Soft (Durometer 22A)	-60 to 400	Metal	FDA Compliant 21 CFR 177.2600	—	ASTM C920 Type S Grade NS Class 25	—	Clear (Clear), White (Opaque)	76435T21	0000


					9.8 fl. oz. Cartridge







									24 hr. Reaches Full Strength

									5	Not Rated	-25% to 25%	Not Rated	-75 to 350	Glass 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	—	ASTM C920 Type S Grade NS Class 25	—	Stainless Steel (Semi-Clear)	7479A31	00000


									5	Not Rated	-25% to 25%	Not Rated	-40 to 350	Glass Metal Plastic Metal to Glass Metal to Plastic Plastic to Glass	—	—	ASTM C920 Type S Grade NS Class 25	—	Almond (Opaque), Aluminum (Opaque), Black (Opaque), Bronze (Opaque), Clear (Semi-Clear), White (Opaque)	7479A4	00000


									10.1 fl. oz. Cartridge







													24 hr. Reaches Full Strength

													10	500%	-25% to 25%	Soft (Durometer 22A)	-60 to 400	Metal	FDA Compliant 21 CFR 177.2600	—	ASTM C920 Type S Grade NS Class 25	—	Almond (Opaque), Aluminum (Opaque), Black (Opaque), Bronze (Opaque), Clear (Clear), White (Opaque)	76435T11	0000

Sealant Primers

		Each
PR-1200 Primer for Dow 700, 732, 733, 734, 736, 737, 739, 786, 995, Loctite®, 76435T21, 76435T11, 7545A611 and 1919N3 Sealants (10.9 fl. oz. Bottle)	7442A23	000000

Clean Room Sealants

Meeting requirements for semiconductor, biomedical, and electronics clean rooms, these sealants won’t contaminate air and surfaces. Elongation and joint compression/expansion tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain.

	Container
	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, day	Elongation	Joint Compression/Expansion Tolerance	Hardness Rating	Temp. Range, ° F	Mil. Spec.	Specs. Met	For Joining	Choose a Color		Each
Polyether



		10.1	Cartridge	20	7	275%	-25% to 25%	Medium Soft (Durometer 38A)	-40 to 200	Fed. Spec. TT-S-00230 Type II Class B	ASTM C920 Type S Grade NS Class 25	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass Wood to Glass	Gray, White	5497N1	000000

Sealants

These sealants are non-sagging, so they won't drip from vertical and overhead surfaces.

Elongation and joint compression/expansion tolerance indicate flexibility. For joints between dissimilar materials and in environments with wide temperature fluctuation, choose a sealant with a higher elongation or joint compression/expansion tolerance. For high-wear applications, choose a harder sealant for the most abrasion resistance.

	Container								Temp., ° F					Each
	Size, fl. oz.	Type	Begins to Harden	Reaches Full Strength	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength, psi	Hardness Rating	Min.	Max.	For Joining	Choose a Color (Clarity)		1-11	12-Up
Polymer



		10.1	Cartridge	5 min.	3 day	500%	-25% to 25%	400	Medium (Durometer 50A)	-40	190	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	Black (Opaque), Gray (Opaque), Limestone (Opaque), White (Opaque)	7606A59	00000	00000


		10.3	Cartridge	30 min.	24 hr.	300%	-25% to 25%	200	Soft (Durometer 35A)	-75	220	Composite Glass Masonry Metal Plastic Wood Composite to Glass Metal to Composite Metal to Glass Metal to Plastic Plastic to Composite Plastic to Glass Wood to Glass	Black (Opaque), Gray (Opaque), White (Opaque)	7606A71	0000	0000


		Polyurethane Rubber



				10.1	Cartridge	3 hr.	24 hr.	880%	-25% to 25%	200	Medium (Durometer 45A)	-20	150	Asphalt Composite Masonry Metal Plastic Rubber Wood Metal to Composite Metal to Plastic Metal to Rubber Plastic to Rubber Rubber to Composite	Black (Opaque), Bronze (Opaque), Gray (Opaque), White (Opaque)	75705T1	00000	0000

Mildew-Resistant Silicone Rubber Sealants

Resistant to mold and mildew, these sealants are well suited to high-humidity environments. They’re non-sagging, so they won't drip from vertical and overhead surfaces. Made from silicone rubber, sealants are RTV (room-temperature vulcanizing).

Dow Silicone Rubber

Cartridge

Model Number 786—Dow 786 meets NSF/ANSI 51 standards and is FDA compliant for direct contact with food.

	Container
Mfr. Model No.	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, hr.	Elongation	Joint Compression/Expansion Tolerance	Hardness Rating	Temp. Range, ° F	For Joining	Food Industry Std.	Specs. Met	Color (Clarity)		Each
786	10.1	Cartridge	20	48	600%	-25% to 25%	Soft (Durometer 25A)	-75 to 350	Glass 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	ASTM C920 Type S Grade NS Class 25	White (Semi-Clear)	74885A66	000000
786	10.1	Cartridge	20	48	600%	-25% to 25%	Soft (Durometer 25A)	-75 to 350	Glass 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	ASTM C920 Type S Grade NS Class 25	White (Opaque)	74885A65	00000
786	10.1	Cartridge	20	48	600%	-25% to 25%	Soft (Durometer 25A)	-70 to 350	Glass 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	ASTM C920 Type S Grade NS Class 25	Clear (Clear)	74885A13	00000

Sealant Primers

		Each
PR-1200 Primer for Dow 700, 732, 733, 734, 736, 737, 739, 786, 995, Loctite®, 76435T21, 76435T11, 7545A611 and 1919N3 Sealants (10.9 fl. oz. Bottle)	7442A23	000000

Silicone Rubber

Cartridge

Cannot Be Sold to Canada—Silicone rubber sealants that cannot be sold to Canada are restricted due to product labeling requirements.

Container
Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, hr.	Elongation	Joint Compression/Expansion Tolerance	Temp. Range, ° F	For Joining	Mil. Spec.	Specs. Met	Color (Clarity)	Cannot Be Sold To		Each
10.1	Cartridge	20	24	430%	-25% to 25%	-80 to 350	Glass Masonry Metal Plastic Rubber Wood Metal to Glass Metal to Plastic Metal to Rubber Plastic to Glass Plastic to Rubber Rubber to Glass	Fed. Spec. TT-S-00230 Fed. Spec. TT-S-001543	ASTM C920 Type S Grade NS Class 25	Clear (Clear)	Canada	75075A711	000000

All-Weather Application Sealants

Apply these sealants on wet surfaces and in cold temperatures. They’re non-sagging, so they won't drip from vertical and overhead surfaces.

Cannot Be Sold To—Sealants that cannot be sold to the regions listed are restricted by local chemical regulations, including limits on VOC (volatile organic compounds).

	Container									Temp., ° F						Each
	Size, fl. oz.	Type	Begins to Harden	Reaches Full Strength, day	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength, psi	Hardness Rating	Application Temp. Range, ° F	Min.	Max.	For Joining	Cannot Be Sold To	Choose a Color (Clarity)		1-11	12-Up
Polymer



		10	Cartridge	5 min.	14	Not Rated	-25% to 25%	Not Rated	Not Rated	20 to 120	-20	190	Asphalt Masonry Metal Plastic Wood Metal to Plastic	California	White (Opaque)	7647T27	000000	000000


		10	Cartridge	10 min.	7	Not Rated	-25% to 25%	Not Rated	Not Rated	20 to 120	-65	190	Asphalt Masonry Metal Plastic Wood Metal to Plastic	—	Clear (Clear)	7647T28	00000	00000
		10	Cartridge	8 hr.	14	550%	-25% to 25%	100	Soft (Durometer 22A)	20 to 120	-20	200	Composite Masonry Metal Plastic Wood Metal to Composite Metal to Plastic Plastic to Composite	—	Almond (Opaque), Black (Opaque), Bronze (Opaque), Brown (Opaque), Clear (Clear), Gray (Opaque), White (Opaque)	7647T3	00000	00000

Submersible Sealants

These non-sagging sealants will not drip while hardening on vertical and overhead surfaces. They’re marine grade, so they stand up to water, corrosion from salt spray, mildew, and UV light.

Silicone Rubber


Cartridge	Tube

Silicone rubber sealant is FDA compliant for direct contact with food. It will not harm fish, so it's safe for use in aquariums. It's also known as RTV (room-temperature vulcanizing).

Container
Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, hr.	Elongation	Joint Compression/Expansion Tolerance	Hardness Rating	Temp. Range, ° F	Food Industry Std.	Specs. Met	For Joining	Choose a Color (Clarity)		Each
2.8	Tube	5	48	Not Rated	-25% to 25%	Not Rated	-40 to 400	FDA Compliant 21 CFR 177.2600	ASTM C920 Type S Grade NS Class 25	Glass Metal Plastic Rubber	Clear (Clear)	7327A21	00000
10.3	Cartridge	20	24	500%	-25% to 25%	Soft (Durometer 26A)	-40 to 400	FDA Compliant 21 CFR 177.2600	ASTM C920 Type S Grade NS Class 25	Glass Metal Wood	Aluminum (Opaque), Black (Opaque), Clear (Clear), White (Opaque)	7327A15	0000

Caulk

Caulk is non-sagging, so it 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 a sealant can sustain. Caulk is best suited to joints between similar materials that aren't exposed to wide temperature fluctuation.

Acrylic Plastic About Acrylic Plastic

Cartridge

													Each
	Begins to Harden, min.	Reaches Full Strength, day	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength	Hardness Rating	Temp. Range, ° F	Mil. Spec.	Specs. Met	For Joining	Choose a Color		1-11	12-Up
10.1 fl. oz. Cartridge



		10	14	Not Rated	-25% to 25%	Not Rated	Not Rated	-30 to 180	Fed. Spec. TT-S-00230 Type II Class A	ASTM C920 Type S Grade NS Class 25	Asphalt Glass Masonry Metal Wood	Clear, White	7649T6	00000	00000


		60	3	500%	-50% to 50%	Not Rated	Not Rated	-20 to 180	Fed. Spec. TT-S-00230	ASTM C920 Type S Grade NS Class 25	Masonry Metal Wood	Almond, Black, Brown, Clear, Gray, White	7640T5	0000	0000

Concrete Joint Sealants


Cartridge	Sausage Pack

Seal joints and gaps in concrete. These sealants are 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. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation.

		Container								For Max. Crack						Each		Package
	Mfr. Model No.	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, hr.	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength, psi	Hardness Rating	Wd.	Dp.	Application Temp. Range, ° F	Temp. Range, ° F	For Joining	Color		Each	Pkg. Qty.		Pkg.
3M Polyurethane Rubber



		525	10.5	Cartridge	90	24	600%	Not Rated	300	Soft (Durometer 25A)	1"	1/2"	40 to 95	-20 to 175	Masonry Metal Plastic Wood	Gray	1671N11	000000	12	1671N111	0000000


		525	20.3	Sausage Pack	90	24	600%	Not Rated	300	Soft (Durometer 25A)	1"	1/2"	40 to 95	-20 to 175	Masonry Metal Plastic Wood	Gray	1671N12	00000	12	1671N121	000000

Structural Sealants

Sausage Pack

These structural sealants combine the mechanical strength of an adhesive with excellent sealing properties and high flexibility. 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. For joints between dissimilar materials and in environments with wide temperature fluctuation, choose a sealant with a higher elongation or joint compression/expansion tolerance. For high-wear applications, choose a harder sealant for the most abrasion resistance.

		Container								Temp., ° F
	Mfr. Model No.	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, hr.	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength, psi	Hardness Rating	Min.	Max.	For Joining	Color (Clarity)		Each
3M Polyurethane Rubber



		540	20.3	Sausage Pack	90	24	600%	-25% to 25%	300	Medium Soft (Durometer 40A)	-40	190	Composite Metal Plastic Rubber Wood Metal to Composite Metal to Plastic Metal to Rubber Plastic to Composite Plastic to Rubber Rubber to Composite	Black (Opaque)	6937T667	000000


		540	20.3	Sausage Pack	90	24	600%	-25% to 25%	300	Medium Soft (Durometer 40A)	-40	190	Composite Metal Plastic Rubber Wood Metal to Composite Metal to Plastic Metal to Rubber Plastic to Composite Plastic to Rubber Rubber to Composite	Gray (Opaque)	6937T678	00000
		540	20.3	Sausage Pack	90	24	600%	-25% to 25%	300	Medium Soft (Durometer 40A)	-40	190	Composite Metal Plastic Rubber Wood Metal to Composite Metal to Plastic Metal to Rubber Plastic to Composite Plastic to Rubber Rubber to Composite	White (Opaque)	6937T649	00000
		540	20.3	Sausage Pack	90	24	600%	-25% to 25%	300	Medium Soft (Durometer 40A)	-40	190	Composite Metal Plastic Rubber Wood	—	6937T635	00000

Optically Clear Sealants

Clear enough to read through, these UV-resistant sealants allow optimal light transmission for use with solar cells and fiber optics. Sealants are 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.

	Container								Temp., ° F
	Size, fl. oz.	Type	Begins to Harden, min.	Reaches Full Strength, day	Elongation	Joint Compression/Expansion Tolerance	Tensile Strength, psi	Hardness Rating	Min.	Max.	For Joining	Color (Clarity)		Each
Polymer



		10.1	Cartridge	10	3	300%	-25% to 25%	300	Medium Soft (Durometer 38A)	-40	200	Metal Wood	Clear (Clear)	7606A61	000000