MDM Window Flashing Kit

MDM/FutureFlash® Sealant include 25′ of MDM/FutureFlash® Sealant 25 mil flashing material, 2 tubes of MDM/FutureFlash® Sealant Sealant and instructions for flashing a flat window.  Enough materials are provided to flash windows up to and including 4.0×4.0.  MDM/FutureFlash® Sealant come in a choice of 6″, 9″, or 12″ flashing material widths. Custom widths and kits for larger sized windows must be special ordered.  MDM/FutureFlash® Sealant may be ordered at, or by calling 626-674-3478. MDM/FutureFlash® Sealant are manufactured by No Leaks, Inc.

Manufactured by Tremco –

MDM/FutureFlash® Sealant Sealant utilizes a solvent-free technology, which represents technical advances over existing Polyurethane systems. Sealant is “drawn,” not “pushed,” into the tube. This method does not allow oxygen in.


The result is a cost effective product with an extended shelf life over other industry brands.

MDM/FutureFlash® Sealant Sealant is UV stable and delivers superior attachment characteristics across a wider temperature range than competitor products.

MDM/FutureFlash® Sealant Sealant has excellent adhesion to a wide variety of building materials including vinyl, wood, aluminum, and masonry.


FutureFlash® 25 & 40 Mil

A proven performer! Third party testing by Fenestration Laboratory


Be aware! Sealants can cause Meltdown when in contact with Peel and Sticks. Sealants should not come into contact with the back of rubberized asphalts.

Meltdown… When sealants come in contact with the back of Peel and Stick Flashing, the result is a chemical reaction that cannot be stopped. Window and Door installation can be done carefully, but working over and under flashing after the installation is typically when contact is made.

Using the Moisture Diversion Method® with MDM/FutureFlash® Sealant guarantees No Meltdown!

Don’t allow this to be your result!