Sliding Side Windows for MJM 40z
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Professional marine installation available through Boston Marine Services.
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Upgrade your MJM 40z with sliding glass windows. Professional installation available.
Transform your time on the water with DTS sliding glass side windows for your MJM 40z. Replacing your existing Isinglass side panels, this upgrade brings everyday convenience and a refined appearance to your helm enclosure, making it easier to enjoy fresh air whenever conditions allow.
Traditional Isinglass panels require rolling, fastening, and careful handling each time you want to open your boat. Sliding glass windows simplify that routine. Easily slide them open to welcome the breeze, then close and lock them in seconds when you’re ready to secure the enclosure. With fewer steps between you and open-air cruising, you can spend more time enjoying your surroundings.
Enjoy the fresh air with less effort
Whether you’re cruising along the coast, relaxing at the dock, or spending an afternoon at anchor, sliding windows let you adjust your enclosure as conditions change. Open them for ventilation and a stronger connection to the water, or slide them closed when you prefer a more enclosed helm area.
Leave the rolling and fastening behind
Repeatedly rolling and handling Isinglass can contribute to wear and damage over time. Switching to sliding glass eliminates that part of your routine, along with the inconvenience of managing rolled panels and securing straps. It’s a practical upgrade that makes opening and closing your boat more convenient.
Give your enclosure a refined finish
Sliding glass brings a clean, finished look to your MJM 40z while maintaining the welcoming feel of its helm and seating area. The result is an upgrade you can appreciate both in appearance and in everyday use—from a quick departure to closing up after a day on the water.
For MJM 40z only
This window upgrade is offered exclusively for the MJM 40z. Before ordering, contact our team with your vessel’s model year and hull number so we can confirm compatibility and review installation requirements.

- Delivery
- Returns
Shipping & Delivery
DTS sliding windows require specialized shipping and are excluded from our free shipping offer on orders over $500. A flat shipping fee of $450 per order applies.
Returns
DTS sliding windows are eligible for return. The customer is responsible for all return-related costs, including return shipping, packaging, and any applicable restocking fees. Please contact us before returning your order to arrange the return and confirm any associated charges.
See the Difference: Isinglass vs. Sliding Glass


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