The RainBuster LEAK-FREE Window Installation System is a comprehensive leak preventing solution for window installers. It consists of an easy to use catalog of installation procedures and products that can be relied upon for all installation projects.  The system combines RainBuster 450 Window & Door Installation Sealant with RainBuster Flashing and RainBuster Installation Procedures.  The LEAK-FREE System comes with an industry leading thirty year parts & labor warranty.


View RainBuster LEAK-FREE Window Installation System Procedures

Installation Procedure Catalog Menu (PDF)

View RainBuster Leak Free System Warranty (PDF)



The system consists of the following products:

RainBuster 405

RainBuster 405 Premium Nail on Flashing is an economical plastic-based flashing material that is ideal for flashing window & door perimeters.

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RainBuster 415

RainBuster 415 Self-Adhered Flashing Membrane is an ultra-high performance flashing material. It is constructed of a high quality rubberized asphalt adhesive and a durable cross-laminated permanent facer. RainBuster 415 is an outstanding choice for flashing window & door perimeters, recessed windows, sill pans, and pot shelves.

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RainBuster 420

RainBuster 420 Nail On Flashing Membrane is an ultra-high performance flashing material. Its unique patented construction allows for easy nail on installation and provides a rubberized asphalt core for self-sealing around penetrating fasteners. It is ideal for window & door installation. When used as part of the

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RainBuster 440 SubZero Flashing Tape is an ultra high performance, self-adhered waterproofing membrane that offers industry best adhesion. Its ability to aggressively adhere down to -20F translates to superior adhesion across a wide range of challenging conditions and surfaces. It is constructed with a flexible and durable woven facer coated with an advanced polymer adhesive. It is a part of the RainBuster Leak Free Window Installation System.

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RainBuster 450

RainBuster 450 Window & Door Sealant is an ultra-high grade polyurethane designed to prevent water intrusion in the most demanding conditions. It is a part of the RainBuster LEAK-FREE Window Installation System and is compatible with RainBuster flashing.

RainBuster 450 uses Green, closed system curing technology to earn LEED and Green Build Credits. Its environmentally friendly formulation is V.O.C. compliant under CARB and AQMD.

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