Mastic's 1932 introduction of Inselbrick, the first low-maintenance exterior, laid the groundwork for Mastic's development of vinyl siding.

Generations of Contractors have recommended Mastic, in part, because of continual product improvements like the widely copied T-lok® system.

70 years of innovative ideas
	Created Inselbrick asphalt siding, the first low-maintenance siding product.
	Continued to search for low-maintenance siding solutions. Began manufacturing aluminum siding. Created the first woodgrain aluminum siding.
	Developed the Z-line clip-on system for installing siding - the forerunner of today's systems. Began developing vinyl siding.
	Introduced the revolutionary T-lok® panel system, which enhanced the strength and stability of vinyl siding. In 1969, introduced the T-lok vinyl panel Barkwood®.
	Created Duranyl®, a proprietary compounding process that produces a more durable vinyl siding.
	Added the extra sun-fading resistance of GELOY® resin, manufactured by GE Plastics. Introduced new colors and styles. Pioneered the development of Dutch lap profiles and cedar-look sidings.
	Introduced QUEST3 Series® premium vinyl siding, setting new standards for toughness and resiliency. T-lok Barkwood® reaches its 30th year as one of the industry's most recognized and popular choices.
	Mastic continues to develop and improve vinyl siding technology and products to meet the needs and desires of a new generation of American homeowners. Created new, dark QUEST3 Series® colors for a rich, contemporary look: Sawmill, Redwood and Pine Needle. Developed Carvedwood2 Series, available in two finishes - textured cedar and smoothly brushed - and a wide array of profiles and colors. Mastic now offers Cedar Discovery™, a cedar-shingle look product with none of the maintenance worries of real wood.

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