Cures Quickly to Seal Hydraulic and Pneumatic Pipes and Fittings
3M Scotch-Weld General Purpose Pipe Sealant PS65 is a one-component, anaerobic sealant that cures and seals hydraulic and pneumatic pipes and fittings. This general purpose, paste pipe sealant is slow-curing, sealing almost instantly, and withstands high temperatures and pressure. We also designed this sealant for easy disassembly, creating a strong, tough seal that can be later disassembled with ease. This sealant is formulated to resist pressure and vibration as well as lock and seal medium to coarse straight and tapered threads.
Recommended Applications
- Pressure vessels
- Air compressors
- Hydraulic and pneumatic systems
Features of a Rapid Seal
3M Scotch-Weld General Purpose Pipe Sealant PS65 provides an almost instant low-pressure seal. A high-pressure seal results when the bond is fully cured. It seals quickly to stop leaks when applied to threads or compression fittings of most metal and certain plastic pipes, without shredding, evaporation or shrinkage. In addition, this sealant prevents galling as well as helps eliminate the waste and mess of leaking hydraulic fluids, oil, fuel and lubricants.
Formulated for Speed and Strength
Offering a rapid seal that withstands heat, pressure and vibration, 3M Scotch-Weld General Purpose Pipe Sealant PS65 is an excellent solution for fast results. Resilient and durable, this pipe sealant is formulated to produce the strong seal necessary for a wide variety of demanding applications.
Understanding Anaerobic Adhesives
Anaerobic adhesives are uniquely formulated to cure in the absence of oxygen. The term “anaerobic” means “living without air” and when the oxygen is excluded, a chemical chain reaction begins that causes the adhesive to polymerize. Contact with metal speeds the polymerization process and rapidly accelerates the curing process, forming tough cross-linked plastic that provides aggressive adhesion with effective shear strength.
More commonly referred to as threadlockers, pipe sealants, retaining compounds, and gasket makers, these adhesives are often used to enhance the seal, or holding force, in the threads of joined fastener systems such as nut-and-bolt assemblies. A nut-and-bolt assembly may have as little as 15% metal-to-metal contact and even a small amount of anaerobic adhesive readily fills any air voids between the threads and then hardens to a thermoset plastic. These unique adhesives are easy-to-dispense, cure rapidly, and provide effective torque strength while resisting temperature and vibration and sealing out moisture and gasses to protect against corrosion. Anaerobic adhesives can decrease manufacturing costs, enhance equipment reliability, minimize aftermarket breakdown, and reduce warranty claims.

3M 24049, Wetordry Cloth Disc 281W, P1000 YF-weight, 8 in x NH, Die 800JM, 7000045052
3M 29611, 641WY 1/4" X 24", 100 Mesh Diamond Cloth Belt, 7010534832
3M 19770, Utility Cloth Sheet 314D, 9 in x 11 in P120 J-weight, 7000000358
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686
3M 11137, Roloc Disc 361F, 50 YF-weight, TR, 1-1/2 in, Die R150S, 7000045094
3M 10116, Synthetic Steel Wool Pads, 10116NA, #2 Medium, 2 in x 4 in, 7000047708
3M 77558, Cubitron II Hookit Cloth Disc 947A, 77558, 40+ to 120+, 6 in x NH, Die 600Z, 7100232737
3M 29902, Sanding Screen, 150 Grit, 12 in x 18 in, 7100160763
Dynabrade 51753 .1 hp Straight-Line Extension Pencil Grinder, Rear Exhaust, 50,000 RPM, 1/8" Collet
Standard Abrasives 722809, PSA A/O Extra Disc, 5 in x NH, 60, 7010368721
3M™ 72016, Remote Alarm & Strobe 529-05-20, Audible, 7000131708, 1 EA/Case
Dynabrade 51705 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 50,000 RPM, 3/32" Collet
3M™ 72013, Adapter 529-04-50, 110-120 VAC, 7000131705, 1 EA/Case
ACS CX1250 Diamond Belts, 1/2" X 24" 200u
3M 13172, Scotch-Brite Multi-Finishing Wheel, MU-WL, 2S Fine, 6 in x 1 in x 1 in, 7000136471
Dynabrade 22092 2-3/4" x 17" Hand Sanding Block
3M™ 07012, Supplied Air Hose W-9435-100/07012(AAD), 100 ft, 3/8 in ID, Industrial Interchange Fittings, High Pressure, 7000005375, 1 EA/Case
3M 33780, 641WY 1/4" X 24", 400 Mesh Diamond Cloth Belt, 7010534915
3M 06518, Scotch Steel Gray Masking Paper, 06518, 18 in x 1000 ft, 2 per case, 7000045441
3M™ 94275, Versaflo™ Gold Coated Tinted Over-Visor with UV/IR Protection M-967N, 70071696879, 1 EA/Case
3M 29834, Sanding Screen, 100 Grit, 18 in x NH, 7100160819
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M 81376, Fibre Disc 381C, 50, 7 in x 7/8 in, Die 700BB, 7010326541
Dynabrade 78423 4-1/2" Dia. x 3/8" Very Fine DynaBrite Surface Conditioning Disc, 25/pack
3M 45721, Cubitron II Hookit Cloth Disc 947A, 80+ X-weight, 6 in x NH, D/F 6HL, Die 600HZ, 7100113107
3M 35827, Hookit Dust Extraction Flexible Sanding Block, 273 mm x 67 mm, 7100256623
ACS 1/2 in x 18 in Diamond Metal Bond Belt, 120M/125u
3M 98282, VentureClad Insulation Jacketing Tape 1577CW-WME, White, 4 in x 50 yd, 7010376416
3M 33440, Cubitron II File Belt, 33440, 80+, 10 mm x 330 mm (3/8 in x 13 in), 7100033195, 10 belts per carton, 5 cartons per case
3M 34786, 663FC, 3/4" X 90", 70u, Diamond Trizact Belts 7100063667
3M 45704, Cubitron II Hookit Cloth Disc 947A, 60+ X-weight, 5 in x NH, Die 500X, 7100113137
3M 09499, Marine Adhesive Sealant 5200, 06500, White, 295 mL Cartridge, 7000000623, 12/Case
3M 20928, PSA Cloth Disc 348D, P180 X-weight, 1 in x NH, Die 100N, 7000118917
3M 22409, Roloc Disc 361F, P120 XF-weight, TR, 1-1/2 in, Die R150S, 7000045103
3M 20279, Disc Pad Holder 947TH, 7 in x 1 in x 5/8-11 Internal Black T Hook, 7000118602
Dynabrade 52410 3" Dia. 7 Degree Offset Disc Sander, Front Exhaust, .7 HP, 15,000 RPM, 3/8"-24 Thread
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
Dynabrade 91164 3/8" W x 13" L 120 Grit A/O DynaCut Belt, 50/pack
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894
3M 54357, Particulate Respirator 8246, R95, with Nuisance Level, Acid Gas Relief, 7000002059, 120 EA/Case
3M 22396, Roloc Disc 361F, 36 YF-weight, TR, 1-1/2 in, Die R150S, 7000045091
Standard Abrasives 37446, PSA A/O Disc, 700595, 1-1/2 in x NH, 60, 7010331822
3M 30202, Disposable Plastic Wheel Maskers, 12 in - 15 in, 125 per box, 7000125074
3M 20912, PSA Cloth Disc 348D, 40 X-weight, 2 in x NH, Die 200P, 7000118920
Dynabrade 11486 Dynabelter Accu-Grinder Abrasive Belt Tool, Heavy-Duty
3M 15913, Scotch-Brite Roloc Disc High Strength, TR, 2 in X NH A Medium, 7000000710 
