About Sealant Flexibility
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About Structural Adhesives
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Coolant-Resistant Surface Fillers

Repair small leaks and cracks in coolant systems for commercial vehicles and industrial equipment. These surface fillers meet ASTM D3147 for their ability to stop leaks in engine cooling systems. Pour them into your coolant to fix both internal and external leaks. They contain ceramic microfibers and copper particles to create a permanent seal. They’re compatible with antifreeze and other coolant system additives.
Container | |||||||||
---|---|---|---|---|---|---|---|---|---|
Size, fl. oz. | Type | Begins to Harden, min. | Reaches Full Strength, min. | Consistency | Temp. Range, °F | Color | For Use On | Each | |
16 | Jug | 7 | 10 | Thick Liquid | Not Rated to 500° | Brown | Aluminum, Brass, Bronze, Copper, Silver, Steel, Stainless Steel, Galvanized Steel, Galvanized Iron, Titanium, Acrylic Plastic, Polystyrene Plastic, Polycarbonate Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, PETG Plastic, PVDF Plastic, Polyimide Plastic, Nylon Plastic, PTFE Plastic, Polyethylene Plastic, Polypropylene Plastic | 0000000 | 000000 |
Epoxy Structural Adhesives
Epoxies are the strongest and most weather- and chemical-resistant structural adhesives. They work especially well on metals. For putty adhesives, slice off the required amount, then knead it together to form a moldable adhesive.

Mfr. Model | Container | Strength | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Name | No. | Net Weight, oz. | Type | Begins to Harden | Reaches Full Strength | Shear, lbs./sq. in. | Peel | Consistency (Viscosity) | Temp. Range, °F | Color | For Joining | Each | |
HighHeat | 8297 | 2 | Stick | 60 min. | 8 hrs. | 900 | Not Rated | Putty (Not Rated) | -20° to 450° | Gray | Metal, Plastic, Rubber, Composites, Masonry | 000000 | 000000 |
PlasticWeld | 8237 | 2 | Stick | 20 min. | 24 hrs. | 900 | Not Rated | Putty (Not Rated) | -20° to 300° | Off-White | Plastic, Rubber, Composites, Masonry | 000000 | 0000 |
Quick-Set Epoxy Structural Adhesives
For quick repairs, these epoxies begin to harden in 6 minutes or less. Epoxies are the strongest and most weather- and chemical-resistant structural adhesives.
The size listed is the combined total of the two parts.
50132 works especially well on plastics and composites.

Mfr. Model | Container | Strength | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Name | No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Shear, lbs./sq. in. | Peel | Mix Ratio | Consistency (Viscosity) | Temp. Range, °F | Color | For Joining | Each | |
PlasticWeld | 50132 | 0.85 | Syringe | 5 min. | 60 min. | 2,000 | Not Rated | 1:1 | Thick Liquid (9,000 cP) | -20° to 300° | Yellow | Metal, Plastic, Rubber, Composites, Masonry, Wood | 000000 | 00000 |
Slow-Set Epoxy Structural Adhesives
To allow time to adjust and position parts, these epoxies remain workable for at least 90 minutes. The strongest and most weather- and chemical-resistant structural adhesives, epoxies work especially well on metals.
The size listed is the combined total of the two parts.

Mfr. Model | Container | Strength | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Name | No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Shear, lbs./sq. in. | Peel | Mix Ratio | Consistency (Viscosity) | Max. Temperature, °F | For Joining | Each | |
Original | 50165 | 0.85 | Syringe | 4 hrs. | 24 hrs. | 1,800 | Not Rated | 1:1 | Paste (150,000 cP) | 550° | Metal, Plastic, Rubber, Composites, Glass, Masonry | 000000 | 00000 |
Urethane Structural Adhesives
Urethane adhesives are the most flexible, so they bond dissimilar materials and damp vibration.
The size listed is the combined total of the two parts.

Mfr. Model | Container | Strength | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Name | No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Shear, lbs./sq. in. | Peel | Mix Ratio | Consistency (Viscosity) | Temp. Range, °F | Color | For Joining | Each | |
Plastic Bonder | 50139 | 0.85 | Syringe | 15 min. | 30 min. | 1,000 | Not Rated | 1:1 | Thick Liquid (50,000 cP) | -20° to 250° | Black | Metal, Metal to Plastic, Metal to Rubber, Metal to Composites, Plastic, Plastic to Rubber, Plastic to Composites, Plastic to Masonry, Rubber, Rubber to Composites, Rubber to Masonry, Composites, Masonry, Wood | 000000 | 00000 |
Puncture-Resistant Sealants


Form seals that resist punctures, cuts, and abrasion to withstand heavy wear and tampering. 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 | ||||||||||||
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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 | |
Polyurethane | ||||||||||||
10.1 | Cartridge | 90 min. | 48 hrs. | 225% | -12.5% to 12.5% | 250 | Medium (Durometer 55A) | 20° to 120° | Metal, Plastic, Rubber, Asphalt, Composites, Glass, Masonry, Wood | White | 0000000 | 000000 |
20 | Sausage Pack | 90 min. | 48 hrs. | 225% | -12.5% to 12.5% | 250 | Medium (Durometer 55A) | 20° to 120° | Metal, Plastic, Rubber, Asphalt, Composites, Glass, Masonry, Wood | White | 0000000 | 00000 |
Structural Sealants


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 | ||||||||||||
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Mfr. Model No. | Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Temp. Range, °F | For Joining | Choose a Color | Each | |
3M Hybrid Polymer | ||||||||||||
760 UV | 9.8 | Cartridge | 30 min. | 24 hrs. | 100% | Not Rated | Medium Hard (Durometer 55A) | -40° to 212° | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Plastic to Rubber Plastic to Composites Rubber Rubber to Composites Composites Wood | 00000000 | 000000 | |
760 UV | 20.3 | Sausage Pack | 30 min. | 24 hrs. | 100% | Not Rated | Medium Hard (Durometer 55A) | -40° to 212° | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Plastic to Rubber Plastic to Composites Rubber Rubber to Composites Composites Wood | 00000000 | 00000 | |
3M Polyurethane | ||||||||||||
540 | 20.3 | Sausage Pack | 90 min. | 24 hrs. | 600% | -25% to 25% | Medium Soft (Durometer 40A) | -40° to 190° | Metal Plastic Rubber Composites Wood | 00000000 | 00000 | |
551 | 20.3 | Sausage Pack | 180 min. | 24 hrs. | 600% | Not Rated | Medium (Durometer 45A) | -40° to 190° | Metal Metal to Plastic Metal to Rubber Metal to Composites Plastic Plastic to Rubber Plastic to Composites Rubber Rubber to Composites Composites Wood | White | 00000000 | 00000 |
Structural Oil- and Fuel-Resistant Sealants


Impervious to the swelling effects of oils, fuels, and solvents, use this high-strength silicone sealant to assemble and repair fuel systems and tanks. Silicone forms a tough, rubbery, UV-resistant seal that remains flexible over time. It's non-sagging, so it won't drip from vertical and overhead surfaces. Also known as RTV (room-temperature vulcanizing).
Elongation and joint expansion/compression tolerance indicate flexibility—the higher the values are, the more joint movement sealants can sustain. This sealant is 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 | Joint Compression/ Expansion Tolerance | Tensile Strength, psi | Hardness | Temp. Range, °F | For Joining | Color | Each | |
Dow Corning Silicone | |||||||||||||
730 FS | 3 | Tube | 12 min. | 24 hrs. | 200% | Not Rated | 300 | Medium Soft (Durometer 40A) | -70° to 350° | Metal, Plastic, Rubber, Composites, Masonry | White | 0000000 | 0000000 |
730 FS | 5.8 | Cartridge | 12 min. | 24 hrs. | 200% | Not Rated | 300 | Medium Soft (Durometer 40A) | -70° to 350° | Metal, Plastic, Rubber, Composites, Masonry | White | 0000000 | 000000 |
High-Strength Concrete Joint Sealants


Seal concrete joints in high-traffic areas—these sealants stand up to heavy wear and tear, such as steel wheel traffic. They're non-sagging, so they won't drip from vertical and overhead surfaces. 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. These sealants are best suited to joints between similar materials that aren't exposed to wide temperature fluctuation. For high-wear applications, choose a harder sealant for the most abrasion resistance.
Container | For Max. Crack | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Size, fl. oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Joint Compression/ Expansion Tolerance | Hardness | Wd. | Dp. | Temp. Range, °F | For Joining | Color | Each | |
Silicone | |||||||||||||
20 | Sausage Pack | 60 min. | 7 days | 1,000% | -50% to 100% | Medium Hard (Durometer 55A) | 1" | 1/2" | -20° to 300° | Metal, Plastic, Rubber, Composites, Glass, Masonry, Wood | Gray | 000000 | 000000 |
29 | Cartridge | 60 min. | 7 days | 1,000% | -50% to 100% | Medium Hard (Durometer 55A) | 1" | 1/2" | -20° to 300° | Metal, Plastic, Rubber, Composites, Glass, Masonry, Wood | Gray | 000000 | 00000 |