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The ShearWater® hull design is precisely produced utilizing the ShearWater® exclusive “HPI” double hull foam core injected process. The ShearWater® “HPI” process incorporates a structurally sound outer hull chemically bonded to a matching full length complete inner hull
with high strength water proof closed cell foam structural flotation foam core injected under pressure between the two hulls. The outer hull is structurally sound without the addition
of the inner hull. The 100% All composite outer hull is hand laminated utilizing fine finish exterior fiberglass matt, high strength structural biaxial fiberglass fabric, composite core material and a layer of Dupont Kevlar over the entire bottom for extreme strength and puncture resistance. The outer hull is structurally reinforced with hand laminated full-length composite stringers and keel. The high-density composite transom is reinforced with hand laminated composite knee braces. The totally sealed and filled double hull structure eliminates the possibility of water intrusion into the hull. One of the most important benefits of the advanced “HPI” technology is undoubtedly the extreme safety factor built into every boat. The benefits of the “HPI” process are further enhanced through the use of the ShearWater exclusive process of chemically bonding the deck to the double hull creating a solid unitized one-piece structure. The ShearWater® proprietary “HPI unitized construction” method is initially very expensive to put into production. The inner hull is complex and time consuming to create. The inner hull mold and the outer hull mold have to be exceptionally strong to withstand the high internal pressure created during the foam injection process. The “HPI” process requires additional manufacturing space, additional steps in the process, and demands that the deck and the hull remain in their molds much longer than the typical construction methods. The additional time in the mold has the benefit of allowing the exterior gelcoat and fiberglass laminate the necessary time to thoroughly cure. The additional curing time is one of the most important factors that contribute to the ShearWater® exclusive, exceptionally straight, brilliant, exterior gelcoat finish. This ShearWater® exclusive technology creates a strong, durable, flex-free, unitized structure that cuts through waves silently and smoothly to deliver a comfortable and confident true sense of security. The unitized “HPI” process reinforced with Dupont Kevlar® produces products with such consistently high strength and durability that costly warranty repairs are virtually eliminated .Based upon fifteen years of trouble free experience with the “HPI” process, American Marine Sports, LLC. offers a limited lifetime hull warranty with total confidence.
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