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Shop Floor & Decor for Sentinel Protect Plus 600sqft. Please see. 99 / piece Size: 300sqft piece Add to CartSentinel Protect Plus Underlayment $59. Add To My Projects Added To My Projects Quick View Sentinel Moisture Barrier Polyethylene Film $68. The use of Sentinel Protect Plus Underlayment for residential spaces is recommended for sound reduction, additional moisture protection and softness under foot. 99 / piece Size: 100sqft piece Add to Cart Add To My Projects Added To My Projects. Constructed of virgin vinyl and is made without Ortho-phthalates. 99 / piece Size: 100sqft piece Add to Cart Add To My Projects Added To My Projects. Add To My Projects Added To My Projects Quick View Sentinel Moisture Barrier Polyethylene Film $68. Add To My Projects Added To My Projects Quick View Sentinel Moisture Barrier Polyethylene Film $68. 99 / piece Size: 100sqft piece Add to Cart Add To My Projects Added To My Projects. 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Product Details. 99 / piece Size: 300sqft piece Add to CartSentinel Protect Plus underlayment recommended for increased performance. 99 / piece Size: 100sqft. Constructed of virgin vinyl and is made without Ortho-phthalates. Lifetime residential and 20-year commercial warranty for peace of mind. Add To My Projects Added To My Projects Quick View Sentinel Moisture Barrier. We decided to use Sentinel Protect Plus Underlayment for our project, and laid out one strip at a time as we moved across the floor. Constructed of virgin vinyl and is made without Ortho-phthalates. 00 per sq/ft and rise to $4. Add To My Projects Added To My Projects Quick View Sentinel Moisture Barrier Polyethylene Film $68. Eco Ultra Quiet Premium Acoustical Underlayment. $72. 99 / piece Size: 100sqft piece Add to Cart Add To My Projects Added To My Projects. Easy Installation. 00 / piece Size: 194sqft. Add To My Projects Added To My Projects Quick View Sentinel Moisture Barrier Polyethylene Film $68. 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