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One-Piece Rubber Locking Gasket LK987 for Stationary Windows and Windshields (LK987) (LK987)

Home  »  Rubber Extrusions and Rubber Seals  »  Locking Gaskets and Window Seals  »  One-Piece Locking Gaskets  »  One-Piece Rubber Locking Gasket LK987 for Stationary Windows and Windshields (LK987)

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About This Locking Gasket Window Seal

One-piece locking gasket window seal, measuring 1.065” by .265”.

Trim-Lok Locking Gaskets are a rubber extrusion designed to lock in the installation of stationary windows or windshields with a 1/4" glass thickness. The one-piece locking window gasket comes in 100-foot rolls with discounts for bulk quantities.

We also carry two-piece locking gaskets and tools and accessories.

LK987 *
Optional Customer Part Number
  • Buy 10 or more and pay $139.10 each (save $25.80 each)
  • Buy 50 or more and pay $114.40 each (save $50.50 each)

*Price breaks, where applicable, will be reflected in cart*

For volume pricing above 5,000 feet, please contact Trim-Lok at 888-874-6565

Price: $164.90

Part Number: LK987

Locking Gasket Window Seal Industries

At Trim-Lok, our one-piece locking gasket helps OEMs across various industries to seal and protect against weather, dust, noise, vibration and more. No matter your industry, our locking window gasket seals can make all the difference:

Why Choose Trim-Lok for Locking Gaskets?

Since 1971, Trim-Lok has been the number one source for rubber extrusions and locking gaskets. We proudly manufacture our products in the United States and work hard to uphold our reputation for excellence, innovation, and dependability.

Trim-Lok is the brand of choice for the marine, automotive, industrial, and manufacturing industries. Our extruded rubber shapes work perfectly for a wide variety of interior and exterior applications. Need a unique product for your exacting specifications? We can help you design the right custom seal for any job.

Description Trim-Lok Locking Gaskets are a rubber extrusion designed to lock in the installation of stationary windows or windshields. Locking gasket window seals provide a secure seal between a metal or fiberglass body panel and a glass or plexiglass window. Available in one piece and two piece styles with a lock strip, and are highly resistant to numerous environmental conditions.

Our window gasket seals can be used in playgrounds, safety equipment, cold-room doors, medical devices, and heavy-duty and semi-truck “peeper” windows. They provide excellent resistance to ozone, sunlight, severe weather, oxygen, acids and aging.

Learn more about window gasket seals and our locking gasket accessories.
Resistance to Ozone – Excellent
Water Absorption – Excellent
Sunlight Aging – Excellent
Low Temperature – Excellent
General Temperature Rating -40°F to 220°F
Material G.P 70 Durometer EPDM, Black, dense EPDM rubber to meet ASTM
D2000 M2BA710 C12, EA14, F17, Z1, Z2, Z3; Z1= Comp. Set 22 hrs. @ 100℃, 30% max., Z2= Non-blooming, Z3= 73 +/- 3 (uncured) shore A.
Must be capable to meet EPDM per SAE J200BC715 C12 C 20.
Hardness 70+/- 3
Elongation 200 (250 according to D2000)


1450 PSI min.

To view our entire catalog of products, download a copy or request a FREE copy be mailed to you, please click here:  CATALOG

Locking gasket options and dimensions, catalog page 38

Two-piece locking gaskets for window seal, catalog page 39

Locking Gasket Installation Video

Find out how to install our rubber window gasket seals by watching the video now to see a demonstration.

Part # Glass Panel Thickness Body Panel Thickness Min Reccomended Clearance Between Glass & Edge Overall Height Min Reccomended Radius of Panel Opening

Weight per Foot

LK1522 0.1875" - .250" 0.035" - 0.067" 0.3125" 1.07" 2.5" 0.275 lbs.
LK1663 0.1875" - .250" 0.09" - 0.14" 0.25" 0.9" 1.5" 0.196 lbs.
LK987 0.1875" - .250" 0.09" - 0.14" 0.265" 1.07" 2.5" 0.246 lbs.
LK1536 0.1875" - .250" 0.1875" - 0.25" 0.406" 1.09" 3.5" 0.255 lbs.
LK1615 0.1875" - .250" 0.06" - 0.09" 0.3125" 0.906" 2.5" 0.275 lbs.
LK1621 0.1875" - .250" 0.046" - 0.075" 0.125" 0.937" 2.0" 0.260 lbs.
LK1660 0.1875" - .250" 0.075" - 0.140" 0.145" 1.00" 2.0" 0.293 lbs.