W. H. Manufacturing provides specification-grade building envelope systems for building owners, architects, and contractors who need practical support, clear documentation, and products shaped by real field experience.
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Products engineered to UL, FM, and ASTM standards.
Waterproofing Systems
Industrial Coatings
Sealant Systems
Joint Systems
PVC/KEE membrane system designed for commercial roofing and building envelope applications requiring strong weather resistance, dimensional stability, and long-term performance. Technical data includes 60±6 mil overall thickness, low-temperature flexibility to -40°F, and solar reflective performance for white systems.
PVC/KEE membrane system for commercial applications where strength, hydrostatic resistance, and durability are required. Technical data lists 60±6 mil overall thickness, 350 psi minimum hydrostatic resistance, and strong retained performance after weathering and oven aging.
TPO membrane system built for commercial roofing applications requiring puncture resistance, abrasion resistance, and reflective performance. Technical data lists 80±8 mil overall thickness, 275 lb minimum puncture strength, and a solar reflective index of 98 for white systems.
Granule-surfaced, heat-welded SBS-modified bitumen cap sheet with non-woven polyester reinforcement, available in GR and BW. Meets ASTM D6164, Type I, Grade G.
Sanded SBS-modified bitumen base ply with non-woven polyester reinforcement. Meets ASTM D6164, Type I, Grade S.
SBS-modified bitumen base ply designed for mechanical attachment to approved roof decks, sanded top and back. Meets ASTM D6164, Type I, Grade S.
Single-component asphalt cutback adhesive for SBS-modified bitumen membrane systems. Meets ASTM D3019, Type III, with VOC under 250 g/L.
Moisture-cure, single-component STPE membrane adhesive at 98% solids by weight. Meets ASTM D3019, Type III, with VOC under 35 g/L.
Semi-rigid asphaltic cover board and protection board with glass fiber reinforcement for modified bitumen roofing and waterproofing. Available in 1/8 in. and 1/4 in. thicknesses.
Two-component, low-rise polyurethane adhesive for adhering insulation and cover boards to approved substrates. 0 g/L VOC.
Trowel-grade, SBS-modified asphalt flashing cement for flashings, repairs, and vertical surfaces. Meets ASTM D4586, Type II.
Flashing cement made with high-grade asphalts and high SBS rubber content, with no fillers or extenders. Available in pails and tubes.
Moisture-cure, single-component STPE flashing cement. Meets ASTM D4586, Type II, Class I, with VOC under 35 g/L.
Polyurethane-bitumen resin for liquid-applied flashings, details, and maintenance, reinforced with LiquiFloWH Reinforcement. Meets ASTM C836.
Non-woven polyester reinforcement for LiquiFlash and other liquid-applied flashings. Available in 4, 6, 8, and 39 in. widths.
Low-odor, rapid-setting polymethacrylate resin for liquid-applied roofing and flashing, in bright white and pebble gray. VOC under 5 g/L.
Non-woven polyester reinforcement for LiquiFloWH PMMA LO systems. Adds membrane strength, puncture resistance, and crack bridging.
Catalyst powder that initiates and controls the cure of LiquiFloWH PMMA LO resin.
Solvent-free, UV-stable silicone mastic for long-term patching and repair. VOC under 50 g/L.
Two-component, low-odor epoxy primer that promotes LiquiFloWH PMMA LO adhesion to metal, concrete, masonry, and wood.