LEER Replacement Windows | Official Glass & Seal Kits
Factory-specification replacement windows restore your LEER truck cap to original condition. Each kit includes tempered safety glass precision-cut to match your cap model, OEM-grade weather seals, and stainless steel mounting hardware. We manufacture these windows to the same tolerances as the original equipment installed at the factory.
Every LEER replacement window is designed for direct fitment on 100XQ, 100XL, 100R, 180, and other LEER model lines. The tempered glass meets DOT safety standards while UV-resistant seals prevent water intrusion and wind noise. Our kits ship complete with detailed installation instructions written for DIY installers and professional shops alike.
What's Included in Every Window Kit
Glass Specifications & Safety Compliance
Our LEER replacement windows use 3/16-inch tempered glass manufactured to the same safety standards as windshield and automotive side glass. The tempering process heats glass to over 1,200°F and rapidly cools it, creating surface compression that makes the glass four to five times stronger than annealed glass. If breakage occurs, tempered glass fractures into small granular chunks rather than dangerous shards.
Every piece of glass carries a permanent DOT stamp certifying compliance with Federal Motor Vehicle Safety Standard 205. The UV-treated glass blocks 99% of harmful ultraviolet radiation while maintaining optical clarity. Thickness tolerances are held to ±0.015 inches across the entire pane to prevent stress concentrations during installation.
Weather Seals & Water Management
The window seal system uses dual-durometer EPDM rubber engineered for extreme temperature cycling. The outer seal lip compresses against the glass to create a primary water barrier, while an inner drainage channel captures any moisture that penetrates the first seal and routes it to weep holes at the bottom of the frame. This two-stage design is identical to the factory sealing system on new LEER caps.
EPDM retains flexibility from -40°F to 248°F without cracking or losing compression set. We mold each seal with embedded ribs that maintain consistent pressure across the glass perimeter even when the cap frame flexes over rough terrain. UV stabilizers prevent the rubber from drying out or turning brittle during years of sun exposure.
Installation Process & Fitment
Installation requires removing the old window assembly, cleaning all surfaces, and positioning the new glass with fresh seals. Most DIY installers complete the job in 45 to 90 minutes per window using basic hand tools. The kit includes step-by-step instructions with photos showing seal orientation and clip placement.
Glass-to-frame alignment is critical for proper sealing. We pre-drill all mounting holes at factory spacing so the glass self-centers when you install the retaining clips. A bead of butyl tape along the seal’s base provides secondary insurance against leaks. Torque specifications for the mounting screws prevent over-compression that could crack the glass or under-compression that allows wind noise.
Complete Your Cap Restoration
Rated 4.8 by verified buyers
Common Questions About LEER Window Replacement
No, LEER and ARE use different frame dimensions and mounting systems even when the caps look similar. Glass manufactured for LEER models will not fit ARE cap frames. Each manufacturer machines their extrusions to proprietary specifications, so replacement glass must match the brand stamped on your cap's label.
If you own an ARE cap, you need ARE-specific replacement glass. Attempting to install LEER glass in an ARE frame will result in gaps around the perimeter that cannot be sealed properly.
Check the label inside your cap near the front bulkhead for the model number (100XQ, 100XL, 100R, 180, etc.). You also need your truck's year, make, model, and bed length. LEER uses different glass dimensions for short bed versus long bed configurations even within the same cap model.
Measure the opening if the label is missing. LEER 100-series side windows are typically 22 inches wide by 15 inches tall, while 180-series windows run about 18 inches tall to match the higher roofline. When ordering, specify which position needs replacement: driver side, passenger side, front slider, or rear.
Yes, most truck owners with basic mechanical skills can install replacement windows in 45 to 90 minutes per window. You need a Phillips screwdriver, a razor blade for removing old sealant, and isopropyl alcohol for surface prep. The kit includes detailed instructions with photos.
The most important steps are cleaning all old butyl tape and sealant from the frame, positioning the new seal correctly with the drainage lip facing outward, and torquing the mounting screws evenly to avoid cracking the glass. If you're uncomfortable working with glass or lack a clean workspace, professional installation at a truck accessory shop typically costs $75 to $150 per window.
Factory LEER window seals using EPDM rubber typically last 8 to 12 years before UV exposure and temperature cycling cause them to lose compression. Trucks parked outdoors in sun-intense climates like Arizona or Texas may see seal degradation in 6 to 8 years, while garage-kept trucks in moderate climates often exceed 12 years.
Early signs of seal failure include wind noise at highway speed, water spots inside the cap after rain, or visible gaps between the glass and rubber. Replace seals at the first sign of leaking rather than waiting, as water intrusion can rust the cap's steel frame from the inside.
Yes, all LEER replacement windows use tempered safety glass meeting DOT Federal Motor Vehicle Safety Standard 205. The glass is heat-treated to increase strength and programmed to shatter into small granular pieces rather than sharp shards if broken.
You can verify this by looking for the permanent DOT stamp etched in the corner of the glass. This stamp includes the glass manufacturer, the DOT certification number, and the designation "AS" (American Standard) followed by a number indicating the glass type and approved vehicle positions.
You can order glass-only without the seal kit for certain LEER models, but we generally recommend replacing seals whenever you replace glass. Once you remove the old glass, the original seals often tear or lose their shape, making proper re-installation difficult.
New seals also ensure optimal compression against the fresh glass surface. The cost difference between a glass-only order and a complete kit with new seals is typically $25 to $40, which is minor compared to the labor of doing the job twice if the old seals leak after reinstallation.
Yes, every window ships fully insured via FedEx or UPS with signature-required delivery. We package glass in custom foam inserts inside double-wall corrugated boxes rated for fragile freight. A "Glass – Handle With Care" label is applied to all sides of the box.
Inspect the box for damage before signing for delivery. If you notice crushed corners or punctures, note the damage on the delivery receipt and photograph the box before opening. File a claim within 48 hours if the glass inside is broken. We ship a replacement at no charge once the carrier confirms the damage claim.