Offers a virtually impermeable vaporproofing system with the lowest WVT rating available. It is both waterproof and vaporproof
	Installs directly over the tamped grade (no gravel fill or sand needed)
	Offers ductility, flexibility, greater tensile strength and excellent handling characteristics
	Provides the best available deterrent for warping, buckling or delamination of subsequent flooring systems

 

Roofer's Knife

Caulking Gun

Roller

Application
HORIZONTAL INSTALLATIONS – ON OR BELOW GRADE: By installing PREMOULDED MEMBRANE VAPOR SEAL with PLASMATIC CORE on the ground prior to placing the concrete floor, moisture will be prevented from coming through the floor slab.

ABOVE GRADE: By placing PREMOULDED MEMBRANE VAPOR SEAL with PLASMATIC CORE on the intermediate structural slab, moisture is prevented from filtering downward from mechanical floors dedicated to heating and air conditioning equipment. This prevents damage to lower floor levels.

HORIZONTAL APPLICATION: PREMOULDED MEMBRANE VAPOR SEAL with PLASMATIC CORE can be applied directly over tamped grade, because it does not require a gravel bed, a bed of sand and/or "crusher rock" prior to the installation of the floor slab, although these practices are acceptable. PMPC works equally well with either side up. However, in areas exposed to prolonged, direct sunlight we recommend poly side up.

Material is placed in position by either the "Dutch Lap" method with laps sealed with SEALTIGHT Catalytic Bonding Asphalt or by the "Butt-Joint" method with joints sealed with SEALTIGHT Detail Strips. These methods provide a permanent, monolithic vapor seal without voids or open seams. If desired, on structural floor slabs of multi-level buildings, sheets may be placed in a bed of hot asphalt for continuous adhesion.

THE "DUTCH LAP" METHOD: The "Dutch Lap" method of applying PMPC on or below-grade horizontal areas. After removing the polyfilm at the 6" overlap areas, seal all laps with SEALTIGHT Catalytic Bonding Asphalt. Pressure roll or "walk-in" all laps to assure complete adhesion.

THE "BUTT-JOINT" METHOD: The Butt-Joint method of applying PMPC: The sheets are tightly butted together and "Butt-Joints" sealed with SEALTIGHT Detail Strips. The Detail Strip is centered on the joints of the felt side and rolled down with pressure for a positive seal.

Estimating
When estimating the amount of PMPC required, figure the actual area plus 20% for overlap when using sheets...for rolls, figure actual areas plus 12% for overlap.

Handling Suggestions
CUTTING: PREMOULDED MEMBRANE VAPOR SEAL can be cut with a roofer's or linoleum knife using a straight edge.

BENDING: To facilitate bending at a change in plane such as at corners or footings, lightly heat the board at the bending area.

STORAGE: Handling of PMPC is not critical because of its strength; however, it is advisable to stack the material on smooth ground or a wood platform in storage or at the excavation site. This will eliminate the possibility of the PREMOULDED MEMBRANE sheets deforming or warping.

POINTING: Pointing with SEALTIGHT Pointing Mastic should be done wherever an edge is exposed to prevent water from traveling under a sheet.

Sealing Procedures
All protrusions through the concrete slab, such as sewer pipes, water pipes and utility inlets, must have a positive seal between the protrusion and the PREMOULDED MEMBRANE. Place a collar of PMPC at least 12" larger than the protrusion around the protrusion. Seal in place with SEALTIGHT Detail Strips and point around the protrusion with SEALTIGHT Pointing Mastic.

Accessories
BONDING ADHESIVES: SEALTIGHT Catalytic Bonding Asphalt: A non-setting bitumen that provides a seal that will expand and contract without breaking bond. Use to seal horizontal joints and rebars between impaction sheets on footing. Packaging: 5 gallon (18.93 liter) Pails

COVERAGE: 5 gallons per 1,000 ft.² of material.

SEALTIGHT PM-5X: A hard-setting bitumen offering strong initial tack, used to adhere PREMOULDED MEMBRANE to vertical surfaces.
Packaging: 5 gallon (18.93 liter) Pails

SEALTIGHT Detail Strip: A sturdy, self-adhering, reinforced tape of polymeric membrane that requires no additional adhesive. Provides a simple, easy and economical method of effectively sealing horizontal and vertical butt joints. Each strip is nominally 9" (.23m) wide and 50' (15.24m) long. Has quick-strip release paper for ease of handling and application. Packaged 4 rolls per carton.

SEALTIGHT Pointing Mastic is used for sealing top horizontal terminations or slab protrusions
Packaging: 5 gallon (18.93 liter) Pails or 29 oz. (857.65 ml) Cartridges.
For full details, see Product Data Sheet No. 740-PD.

Packaging

	Width	Length	Weight
Sheets	48" (1.22m)	8' (2.44m)	65 lbs./100 ft² (29.48 kg)
Rolls	48" (1.22m)	50' (15.24m)	60 lbs./100 ft² (27.22 kg)

 

COVERAGE
Adhesive	Joint Method	Per MSF of Membrane (Approx.)
Catalytic Bonding Asphalt*	Sheets: 6" (152.4mm) laps	5 gal. (18.93 liters)
	Rolls: 6" (152.4mm) laps	3 gal. (11.36 liters)
PM-5X	Sheets only	40 gal. (151.4 liters)
Hot-Mop Asphalt*	Complete	400-500 lbs. (180-230 kg)
Detail Strips	Butt-Joints	416 linear ft. (126.8m)
Pointing Mastic**	Detail Strip Edge Terminations	2000 lineal ft./gal. (161.0m/L)
*Based on minimum of 1/16" (1.59mm) film thickness
**1/8"x 1"x 200 lineal feet (3.18mm x 25.4mm x 60.96m)

Maintain Energy Efficiency
SEALTIGHT Products used in conjunction with structural construction aid in the integrity of other structural systems such as insulation. Because wet insulating materials lose much of their R factor performance characteristics, this reduces the energy efficiency of the structure. SEALTIGHT Products applied for thermal and moisture protection help prevent moisture or vapor penetration into the other systems. These products play a key role in maintaining the structure's energy efficiency.

Precautions
PREMOULDED MEMBRANE VAPOR SEAL does not negate the need for relief of hydrostatic heads. A complete drain tile system should be placed on the exterior of the footing and, in severe cases, on the interior of the footing as well. If applied to concrete surfaces... repair any spalled areas... fill all voids and remove sharp protusions.

Adhesive coverage ratios must be adjusted to compensate for surface irregularities and additional coats may be required to provide proper adhesion. For maximum concrete performance and durability, the floor slab concrete design should provide for the lowest possible slump and yet assure complete hydration of the concrete. Refer to Material Safety Data Sheet for complete health and safety information.

This material last updated January, 2000.

 

W. R. MEADOWS, INC. warrants that, at the time and place we make shipment, our materials will be of good quality and will conform with our published specifications in force on the date of acceptance of the order. THE FOREGOING WARRANTY SHALL BE EXCLUSIVE AND IN LIEU OF ANY OTHER WARRANTY, EXPRESS OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ALL OTHER WARRANTIES OTHERWISE ARISING BY OPERATION OF LAW, COURSE OF DEALING, CUSTOM OF TRADE OR OTHERWISE. As the exclusive remedy for breach of this Warranty, we will replace defective materials, provided, however, that the buyer examine the materials when received and promptly notify us in writing of any defect before the materials are used or incorporated into a structure. Three (3) months after W. R. MEADOWS, INC. has shipped the materials, all our Warranty and other duties with respect to the quality of the materials delivered shall conclusively be presumed to have been satisfied, all liability therefore terminates, and no action for breach of any such duties may thereafter be commenced. W. R. MEADOWS, INC. shall in no event be liable for consequential damages. Unless otherwise agreed to in writing, no warranty is made with respect to materials not manufactured by W. R. MEADOWS, INC. We cannot warranty or in any way guarantee any particular method of use or application of the performance of materials under any particular condition. Neither this Warranty nor our liability may be extended or amended by our salesmen, distributors or representatives, or by our distributor's representatives, or by any sales information or drawings.