Pipe thread sealants
Anaerobic sealants for threaded pipe joints; drinking water and gas approved (DVGW, NSF) types, hydraulic and pneumatic thread sealants and PTFE thread sealing cord.
On threaded pipe joints PTFE tape is often a habit, not the best solution: too much tape strains the thread and its shreds get into the line. Liquid thread sealants and PTFE cords give more reliable sealing for the fluid and pressure of the line; we select the right product for the fluid. We ship thread sealing products from stock across Türkiye and abroad, and also sell them through hidroticaret.com, our online store (Turkish).
Types
Anaerobic thread sealants
Liquids that cure in the absence of air and fill the thread on threaded metal joints; low, medium and high strength.
Drinking water and gas approved thread sealants
With approvals such as DVGW and NSF; for drinking water and gas installations.
Hydraulic and pneumatic thread sealants
For hydraulic and pneumatic connections; leave no particles that could block fine filters.
PTFE thread sealing cord
More reliable than PTFE tape on metal and plastic threads; the joint can be adjusted after winding.
How to select
Thread sealing products are for tapered thread joints; on parallel threads sealing is done with a sealing washer or an O-ring. On a tapered thread the liquid sealant fills the entire thread gap and, once cured, also prevents loosening by vibration.
Selection is by fluid and approval: on drinking water and gas lines an approved product is mandatory. On hydraulic and pneumatic lines shreds of tape can block valves and filters; liquid sealant eliminates this risk. The table below lists the products in stock with their strength and approvals.
A high viscosity product is used on large and coarse threads, a low viscosity product on fine threads. On plastic threads PTFE cord is preferred over anaerobic products.
Pipe thread sealant products
| Product | Strength | Approval |
|---|---|---|
| AN 301-65 | - | DVGW, NSF |
| AN 301-72 | - | DVGW, NSF |
| AN 302-25 | Low | - |
| AN 302-45 | Medium | DVGW |
| AN 302-75 | High | BAM |
| AN 302-77 | High | - |
| AN 302-80 | High | Drinking water |
| AN 305-11 | Medium | DVGW |
| AN 305-42 | Medium | DVGW |
| AN 305-67 | Low | - |
| AN 305-72 | Medium | DVGW |
| AN 305-77 | Medium | DVGW, BAM |
| AN 305-78 | Medium | DVGW, BAM |
| AN 305-86 | High | - |
| SI 303-31 | - | NSF |
Product codes, strength and approvals are from the manufacturer's (Weicon) product descriptions. "-" means the information is not given in the product description.
Frequently asked questions
Why use liquid thread sealant instead of PTFE tape?
Liquid sealant fills the entire thread gap, prevents loosening by vibration and leaves no shreds in the line. Too much tape, on the other hand, strains the thread and its shreds can get into the system.
Is thread sealant used on parallel threads?
On parallel threads sealing is provided by a sealing washer or an O-ring; thread sealing products are for tapered threads.
Which thread sealant is used on drinking water lines?
Products marked as approved for drinking water (DVGW or NSF).
What is used on plastic threads?
Anaerobic products do not cure on plastic; PTFE thread sealing cord is used on plastic threads.
When can the joint be pressurized?
It depends on the product; a short time may be enough for a low pressure test, while full strength requires the time stated in the product data sheet.
Stock, sizes and part numbers
We select and supply the products in this group according to the application. Send us your requirement, the size and the operating conditions on WhatsApp and we will recommend the right product.