Our D-Box seals are the only true watertight seals on the market today. Our 4''...

Our D-Box seals are the only true watertight seals on the market today. Our 4'' seal fits in both our 12'' and 20'' plastic D-Box. It accepts 2'', 3'', 4'' and corrugated pipe. Our 6'' seal works in our 20'' plastic D-Box. No other seals can do so much!

When a friction fit is important, you can count on the Polylok Grommet. Our...

When a friction fit is important, you can count on the Polylok Grommet. Our grommets are available in a variety of sizes and are used to ensure a watertight seal. Polylok Grommets instantly provide a water and vapor seal on either curved or flat surfaces!

Eliminate grouting around the pipe. Quick and easy conversion to any existing form. ...

Eliminate grouting around the pipe. Quick and easy conversion to any existing form. Our pipe seals can be used in any application. It's time to upgrade your product with the Polylok Pipe Seal... your customers will be glad you did.
    Ideal for:
  • Septic Tanks
  • Distribution Boxes
  • Drainage Boxes

U.S. Patent No# 4,805,902; 4,805,920; 5,601,291; 5,626,346
Canada Patent No# 1,278,588; 2,171,653; 2,171,654

Use the POLY II for the inlet & outlet pipes on septic tanks, aerobic systems,...

Use the POLY II for the inlet & outlet pipes on septic tanks, aerobic systems, or anywhere you need water tightness. This new hybrid seal will mount to our existing mandrel that bolts directly to the septic tank form just like the original. The Poly II will meet the vacuum & hydro-static pressure requirements of A.S.T.M. spec. C-923 for 2", 3" and 4" SCHD. 40. It will allow you the water-tightness that is now required and the flexibility of choosing what size pipe you want!

This seal gives you all the features of the Poly I Pipe Seal but also...

This seal gives you all the features of the Poly I Pipe Seal but also allows you to install the Polylok Baffle and Polylok PL-122 Effluent without drilling. It will save you and your customers time and money!

U.S. Patent No# 5,286,040

Our Poly II Open End is watertight and airtight. The boot fits any 2"...

Our Poly II Open End is watertight and airtight. The boot fits any 2" pipe. Made of durable EPDM rubber, this flexible pipe-to-concrete connector meets or exceeds all ASTM 1227 and 923 requirements as well as Grease Interceptor specifications.

Poly II Open End Boot Seal meets or exceeds all requirements of the following standards, codes, specifications and/or test methods:
  • ASTM C 1227
  • ASTM C 1644
  • ASTM C 923
  • ASTM C 1244
  • NPCA Best Practices
  • NOWRA Model Code

Like our Poly II Open End, our Poly II CE boot is watertight and airtight....

Like our Poly II Open End, our Poly II CE boot is watertight and airtight. This is the ideal boot for applications requiring vacuum testing. The boot fits any 2" pipe. Made of durable EPDM rubber, this flexible pipe-to-concrete connector meets or exceeds all ASTM 1227 and 923 requirements as well as Grease Interceptor specifications. Using this boot ensures watertight connections. This connector casts into concrete simply by using our Polylok plastic mandrel or any existing two-inch open-end boot mandrel. Complete with an external stainless steel hose clamp, when installed correctly this two-inch closed-end boot will perform up to 10 psi or 10 in. hg. The boot accepts 2" SCHD. 40 or SDR. 35 pipe. It can be cast into walls from 2 1/2" - 4" thickness.

Poly II Closed End Boot Seal meets or exceeds all requirements of the following standards, codes, specifications and/or test methods:
  • ASTM C 1227
  • ASTM C 1644
  • ASTM C 923
  • ASTM C 1244
  • NPCA Best Practices
  • NOWRA Model Code

The first and only patented Closed Ended Boot Seal on the market. The Poly...

The first and only patented Closed Ended Boot Seal on the market. The Poly III makes it easy to vacuum test because there are no openings to plug. It accepts either 3" or 4" pipe. It also meets ASTM C-923 specifications and can fit in a 2 1/2" -6" wall.

U.S. Patent No# 6,691,975

Polylok, Inc. is proud to announce our POLY IV Open-Ended, High-Pressure, Seal with clamp. ...

Polylok, Inc. is proud to announce our POLY IV Open-Ended, High-Pressure, Seal with clamp. This seal meets or exceeds all the ASTM C-923 requirements.

Poly IV Open End Boot Seal meets or exceeds all requirements of the following standards, codes, specifications and/or test methods:
  • ASTM C 1227
  • ASTM C 1644
  • ASTM C 923
  • ASTM C 1244
  • NPCA Best Practices
  • NOWRA Model Code

Need to vacuum test or water test your tanks? This is the best seal...

Need to vacuum test or water test your tanks? This is the best seal on the market today for vacuum testing and water testing tanks. It is designed with a closed ended, so it is no longer necessary to plug seal holes before testing. And, it's easy to cut the seal at the installation site. In addition, this new seal is longer than our other seals, making it even easier to install.

Poly IV Closed Ended Boot Seal meets or exceeds all requirements of the following standards, codes, specifications and/or test methods:
  • ASTM C 1227
  • ASTM C 1644
  • ASTM C 923
  • ASTM C 1244
  • NPCA Best Practices
  • NOWRA Model Code

Like the Poly III, the Poly VI Closed Ended Boot Seal is the only patented...

Like the Poly III, the Poly VI Closed Ended Boot Seal is the only patented closed end seal on the market. The Poly VI makes it easy to vacuum test because there are no openings to plug. It accepts either 4" or 6" pipe. It also meets ASTM C-923 specifications and can fit in a 3" - 6.5" wall.

Poly VI Closed End Boot Seal meets or exceeds all requirements of the following standards, codes, specifications and/or test methods:
  • ASTM C 1227
  • ASTM C 1644
  • ASTM C 923
  • ASTM C 1244
  • NPCA Best Practices
  • NOWRA Model Code

U.S. Patent No# 6,691,975

Polylok has developed an easy way to mount your mandrels to your forms without any...

Polylok has developed an easy way to mount your mandrels to your forms without any drilling. We offer Magnetic Mandrels to fit every size seal. Now you can pour your tanks and easily swap out mandrels between pours. Want to move the seal to another section of the tank, or add a seal? No problem!

Our mandrels are made from a polypropylene composite which allows the mandrels to maintain their...

Our mandrels are made from a polypropylene composite which allows the mandrels to maintain their shape even during the most demanding applications. Each time you cast a Polylok Seal into your tank, you can be assured you will get a watertight connection. Our mandrels will accommodate 2.5" - 6" wall thickness. We provide free mandrels with your initial order of Polylok Seals. We will also cut your mandrels to fit your form at no additional charge.

Polylok’s Universal Ready Adapter allows you to cast various seals into your concrete tanks enabling...

Polylok’s Universal Ready Adapter allows you to cast various seals into your concrete tanks enabling you to use a Polylok Baffle (Part Number 3015) or our PL-122 Effluent Filter with a Filter Ready Adapter (Part Number 30144). By using our Universal Ready Adapter, you can choose from our Poly I, II or III Seal, depending on your application.