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About Sealant Flexibility
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About Structural Adhesives
More
Thread-Repair Surface Fillers

Repair stripped threads on female connections, such as oil pans, valve covers, and distributor caps. Apply the included release agent to a male fastener that fits your female connection. Then mix the two-part filler and apply to the stripped threads. Screw in the male fastener, let it set up for five minutes, and remove. The new threads can be used in two hours. The container size listed is the combined total of the two-part filler.
Certificates with a traceable lot number and product shelf life are available for these products. Download certificates from ACTIVITY after your order ships.
Container | |||||||||||||
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Mfr. Model No. | Size, oz. | Type | Begins to Harden, min. | Reaches Full Strength, hrs. | Consistency | Mix Ratio | For Use Outdoors | Temp. Range, °F | Color | Finishing Method | For Use On | Each | |
Loctite® Form-A-Thread® | |||||||||||||
PC 3967 | 0.3 | Syringe, Bottle | 5 | 2 | Putty | 1:1 | Yes | -65° to 300° | Gray | Machine, Drill, Sand, Saw, Tap | Aluminum, Brass, Bronze, Copper, Steel, Stainless Steel, Cast Iron, Titanium, Galvanized Iron, Galvanized Steel, Silver | 000000 | 000000 |
Aerosol Surface Fillers

Spray to fill in small dents, cracks, and scratches. These surface fillers build on themselves to cover minor surface imperfections.
Container Size, oz. | Begins to Harden, min. | Reaches Full Strength, hrs. | Approximate Coverage @ Thickness | For Use Outdoors | Temp. Range, °F | Color | Finishing Method | For Use On | Each | |
11 | 10 | 24 | 9 sq. ft. @ 2 mil | Yes | 50° to 90° | Gray | Sand | Aluminum, Brass, Bronze, Copper, Galvanized Iron, Galvanized Steel, Iron, Steel, Stainless Steel, Silver, Titanium, Fiberglass, Wood | 000000 | 000000 |
Light-Activated Surface Filler Pens
These surface fillers come in a pen for precision application. After applying, use the LED on the back of the pen to instantly cure. They can be used with most types of metal as well as ceramic, stone, and porcelain.

Formulation | Container Size, oz. | Begins to Harden, sec. | Reaches Full Strength, sec. | Consistency | For Use Outdoors | Temp. Range, °F | Color | Finishing Method | For Use On | Batteries Included | Each | |
Acrylic | 0.2 | 3 | 12 | Gel | Yes | 0° to 245° | Clear | Drill, Sand | Aluminum, Brass, Copper, Steel, Stainless Steel, Galvanized Iron, Galvanized Steel, Ceramic, Porcelain, Stone | Yes | 000000 | 000000 |
Water-Resistant Surface Fillers



Mix these two-part epoxy surface fillers to create a strong repair in wet environments or underwater. Use them to repair cracked, worn, and damaged surfaces. Size listed is the combined total of the two parts.
Paste fillers resist alkalies, solvents, gasoline, and oil.
Container | ||||||||||||||
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Size, oz. | Type | Begins to Harden, min. | Reaches Full Strength | Consistency | Mix Ratio | Approx. Coverage @ Thick. | Max. Thick. | For Use Outdoors | Temp. Range, °F | Color | Finishing Method | For Use On | Each | |
Surface Fillers | ||||||||||||||
2 | Tube | 5 | 24 hrs. | Paste | 1:1 | 12 sq. in. @ 1/4" | 1/2" | Yes | Not Rated to 200° | Gray | Machine, Drill, Sand, Saw, Tap | Aluminum, Brass, Bronze, Copper, Steel, Galvanized Iron, Galvanized Steel, Titanium, Acrylic Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, Polyimide Plastic, Nylon Plastic, Vinyl Plastic, EPDM Rubber, Fiberglass, Glass, Concrete, Ceramic, Porcelain, Plaster, Grout, Masonry, Asphalt, Stone, Wood | 0000000 | 000000 |
2 | Jar, Bottle | 20 | 60 min. | Paste | 5:1 | 8 1/2 sq. in. @ 1/4" | 1 1/2" | Yes | Not Rated to 185° | White | Machine, Drill, Sand, Saw, Tap | Aluminum, Brass, Bronze, Copper, Steel, Galvanized Iron, Galvanized Steel, Titanium, Acrylic Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, Polyimide Plastic, Nylon Plastic, Vinyl Plastic, EPDM Rubber, Fiberglass, Glass, Concrete, Ceramic, Porcelain, Plaster, Grout, Masonry, Asphalt, Stone, Wood | 0000000 | 00000 |
2 | Jar, Bottle | 20 | 60 min. | Paste | 5:1 | 8 1/2 sq. in. @ 1/4" | 1 1/2" | Yes | Not Rated to 250° | Gray | Machine, Drill, Sand, Saw, Tap | Aluminum, Brass, Bronze, Copper, Steel, Galvanized Iron, Galvanized Steel, Titanium, Acrylic Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, Polyimide Plastic, Nylon Plastic, Vinyl Plastic, EPDM Rubber, Fiberglass, Glass, Concrete, Ceramic, Porcelain, Plaster, Grout, Masonry, Asphalt, Stone, Wood | 0000000 | 00000 |
14 | Can, Jar | 20 | 60 min. | Paste | 5:1 | 62 sq. in. @ 1/4" | 1 1/2" | Yes | Not Rated to 185° | White | Machine, Drill, Sand, Saw, Tap | Aluminum, Brass, Bronze, Copper, Steel, Galvanized Iron, Galvanized Steel, Titanium, Acrylic Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, Polyimide Plastic, Nylon Plastic, Vinyl Plastic, EPDM Rubber, Fiberglass, Glass, Concrete, Ceramic, Porcelain, Plaster, Grout, Masonry, Asphalt, Stone, Wood | 0000000 | 00000 |
14 | Can, Jar | 20 | 60 min. | Paste | 5:1 | 62 sq. in. @ 1/4" | 1 1/2" | Yes | Not Rated to 250° | Gray | Machine, Drill, Sand, Saw, Tap | Aluminum, Brass, Bronze, Copper, Steel, Galvanized Iron, Galvanized Steel, Titanium, Acrylic Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, Polyimide Plastic, Nylon Plastic, Vinyl Plastic, EPDM Rubber, Fiberglass, Glass, Concrete, Ceramic, Porcelain, Plaster, Grout, Masonry, Asphalt, Stone, Wood | 0000000 | 00000 |
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 | |||||||||
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Size, 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 |
Fuel-Resistant Surface Fillers

Also known as sloshing compounds, these two-part epoxies bond to rough and rusty surfaces in fuel tanks to repair leaks and prevent further corrosion. They withstand permanent immersion in fuel, oil, and harsh solvents. Use them with metal, plastic, and fiberglass tanks. Mix the smaller can with the bigger one and pour into your fuel tank. Rotate the tank to coat the interior and dump out any excess. Allow to cure overnight. Size listed is the combined total of the two parts.
1.5-pint container can treat a 10-gallon fuel tank. 3-pint container can treat a 20-gallon fuel tank.
Container | ||||||||||||
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Size, pt. | Type | Begins to Harden, min. | Reaches Full Strength, hrs. | Consistency | Mix Ratio | For Use Outdoors | Temp. Range, °F | Color | Finishing Method | For Use On | Each | |
1.5 | Can | 5 | 24 | Thick Liquid | 2:1 | No | 70° to 90° | Amber | Drill, Sand, Tap | Aluminum, Brass, Bronze, Copper, Silver, Steel, Stainless Steel, Cast Iron, Galvanized Iron, Galvanized Steel, Titanium, Acrylic Plastic, Polycarbonate Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, PETG Plastic, PVDF Plastic, Polyimide Plastic, Nylon Plastic, Polyethylene Plastic, Polypropylene Plastic, Vinyl Plastic, Fiberglass, Ceramic, Porcelain | 0000000 | 000000 |
3 | Can | 5 | 24 | Thick Liquid | 2:1 | No | 70° to 90° | Amber | Drill, Sand, Tap | Aluminum, Brass, Bronze, Copper, Silver, Steel, Stainless Steel, Cast Iron, Galvanized Iron, Galvanized Steel, Titanium, Acrylic Plastic, Polycarbonate Plastic, ABS Plastic, PVC Plastic, CPVC Plastic, PETG Plastic, PVDF Plastic, Polyimide Plastic, Nylon Plastic, Polyethylene Plastic, Polypropylene Plastic, Vinyl Plastic, Fiberglass, Ceramic, Porcelain | 0000000 | 00000 |
Optically Clear Reusable Adhesive Gel

Temporarily stabilize objects on flat surfaces with this clear adhesive gel. It removes cleanly from most surfaces with a twist, and it won't dry out so it can be used again.
Container | |||||||
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Size, oz. | Type | Reaches Full Strength | Temp. Range, °F | Color | For Joining | Each | |
4 | Jar | 60 min. | -20° to 220° | Clear | Ceramic, Composites, Glass, Masonry, Metal, Rubber | 0000000 | 000000 |
Putty-to-Rubber Moldable Glue


This putty-like glue cures into a pliable rubber. Use it to repair seals and cracks, or mold it into hooks and bumpers.
Container | ||||||||||
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Size, oz. | Type | Begins to Harden | Reaches Full Strength | Elongation | Temp. Range, °F | Color | For Joining | Pkg. Qty. | Pkg. | |
0.12 | One-Time-Use Packet | 30 min. | 24 hrs. | 100% | -40° to 355° | Black | Cardboard, Ceramic, Composites, Fabric, Glass, Masonry, Metal, Plastic, Rubber, Wood | 3 | 0000000 | 000000 |
0.12 | One-Time-Use Packet | 30 min. | 24 hrs. | 100% | -40° to 355° | Blue, Red, Yellow | Cardboard, Ceramic, Composites, Fabric, Glass, Masonry, Metal, Plastic, Rubber, Wood | 3 | 0000000 | 00000 |
0.12 | One-Time-Use Packet | 30 min. | 24 hrs. | 100% | -40° to 355° | Gray | Cardboard, Ceramic, Composites, Fabric, Glass, Masonry, Metal, Plastic, Rubber, Wood | 3 | 0000000 | 00000 |
0.12 | One-Time-Use Packet | 30 min. | 24 hrs. | 100% | -40° to 355° | White | Cardboard, Ceramic, Composites, Fabric, Glass, Masonry, Metal, Plastic, Rubber, Wood | 3 | 0000000 | 00000 |
Metal-Reinforced Epoxy Structural Adhesives
These machinable epoxies are mixed with metal so they can be used to repair cracks and threaded holes. The strongest and most weather- and chemical-resistant structural adhesives, epoxies work especially well on metals. For putty adhesives, slice off the required amount, then knead it together to form a moldable adhesive.
8267 is reinforced with steel, but won't rust.

Mfr. Model | Container | Strength | |||||||||||
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Name | No. | Size, oz. | Type | Begins to Harden | Reaches Full Strength | Shear, lbs./sq. in. | Peel | Consistency (Viscosity) | Temp. Range, °F | Color | For Joining | Each | |
SteelStik | 8267 | 2 | Stick | 5 min. | 60 min. | 900 | Not Rated | Not Rated | -20° to 300° | Gray | Metal, Rubber, Composites, Masonry | 000000 | 00000 |
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 | |||||||||||
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Name | No. | Size, 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 | 00000 |
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 | ||||||||||||
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Name | No. | Size, 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 | |||||||||||
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Name | No. | Size, 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, 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 |
Non-Hardening Caulk
Also known as thumb-grade caulk, this forms a non-hardening, moisture-resistant seal that remains pliable.
Butyl rubber has a sticky, gummy consistency.

Black | ||||||||||
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Mfr. Model No. | Wd. | Thick. | Lg., ft. | Tensile Strength | Hardness | Temp. Range, °F | For Joining | Number of Pieces | Each | |
08578 | 5/16" | 5/16" | 1 | Not Rated | Not Rated | -20° to 200° | Metal Plastic Asphalt Composites Glass Masonry Wood | 60 | 0000000 | 000000 |
5354 | 1/4" | 1/8" | 50 | Not Rated | Medium Hard (Durometer 60A) | -50° to 190° | Metal Metal to Plastic Metal to Glass Plastic Plastic to Glass Glass Wood Wood to Glass | 1 | 0000000 | 00000 |
5354 | 1/4" | 1/4" | 25 | Not Rated | Medium Hard (Durometer 60A) | -50° to 190° | Metal Metal to Plastic Metal to Glass Plastic Plastic to Glass Glass Wood Wood to Glass | 1 | 00000000 | 00000 |
5354 | 3/8" | 1/8" | 50 | Not Rated | Medium Hard (Durometer 60A) | -50° to 190° | Metal Metal to Plastic Metal to Glass Plastic Plastic to Glass Glass Wood Wood to Glass | 1 | 0000000 | 00000 |
5354 | 3/4" | 1/8" | 50 | Not Rated | Medium Hard (Durometer 60A) | -50° to 190° | Metal Metal to Plastic Metal to Glass Plastic Plastic to Glass Glass Wood Wood to Glass | 1 | 0000000 | 000000 |