(2)
Edge seal each overlap with 30-079 silicone sealant. Optional method: Cover joint with 3-inch wide Permacel tape.
(3)
Where carpets adjoin mats, insert carpets in edge retaining devices.
C. Install Bonded Mylar Waterseal (optional waterseal method prior to installation of mat).
(1) General
(a) Two methods of bonding waterseal to the floor are described in this procedure. 1) Pro-Seal 501 (BMS 5-31) liquid adhesive. In this method the adhesive is spread on the floor area and the Mylar waterseal rolled down into the adhesive.
2) Foam sheet adhesive IM2700. In this method the adhesive sheet is bonded to the underside of the Mylar in a prior operation. Exposed side is covered by protective paper.
(2) Prepare adhesive, liquid or sheet.
(a) Pro-Seal 501 (BMS 5-31) liquid method.
1) Thoroughly mix 100 parts by weight of Pro-Seal 501F with 30 parts by weight of Pro-Seal 501A. Mix for approximately 5 minutes using a spatula or similar tool. Pro-Seal 501F/501A adhesive should not be thinned.
NOTE: Work life of prepared Pro-Seal 501F/501A as 15 minutes. The sequence of steps in preparation for bonding should be such that the adhesive can be applied and the mat bonded immediately after preparation of the adhesive.
501
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(b) Foam sheet adhesive, IM2700 method. 1) Hold foam adhesive in correct orientation with mylar. 2) Apply tacky side to mylar at one edge and roll down toward other edge. Keep
free edge of adhesive away from mylar to achieve smooth contact. 3) Press adhesive down firmly with overlapping roller strokes.
NOTE: IM2700 laminated mylar sheet can be stored at 40°F to 90°F up to 12 months before use.
(3)
Apply mylar to floor (Pro-Seal Method).
(a)
Trim mylar strip to size.
(b)
Spread approximately 50 grams per square foot (1.75 ounces) of adhesive to achieve bondline thickness of 0.010 to 0.030 inch over floor.
(c)
Position mylar and sweep or roll out air bubbles and excess adhesive to obtain smooth surface.
(d)
Overlap mylar a minimum of 4 inches and apply adhesive in overlap. Remove squeeze-out adhesive and clean area with gauze dampened with solvent.
(e)
Mylar should be undisturbed for 12 hours to prevent dimpling from pressure. Galley or mat may be installed after 24 hours.
(4)
Apply mylar to floor (IM2700 method).
(a)
Trim mylar strip to size.
(b)
Peel protective paper from edge of adhesive sheet previously bonded to mylar.
(c)
Position mylar along one edge and roll down progressively across floor to prevent air entrapment. Peel off protective paper as required.
(d)
Press mylar down firmly with overlapping roller strokes.
(e)
Butt mylar strips and cover joints with four-inch wide mylar film tape.
(f)
Mylar may be walked on immediately.
D. Install Bonded Mat (optional mat installation method substitute for double-backed tape).
(1) General
(a) Two methods of bonding mat to waterseal are described in this procedure. 1) Pro-Seal 501 (BMS 5-31) liquid adhesive. In this method the adhesive is spread on the waterseal area and the mat rolled down into the adhesive.
2) EP45 X1 film sheet adhesive. In this method the adhesive sheet is bonded to the underside of the mat in a prior operation. Exposed side is covered by a protective paper.
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(2) Prepare adhesive, liquid or sheet.
(a) Pro-Seal 501 (BMS 5-31) liquid method.
1) Thoroughly mix 100 parts by weight of Pro-Seal 501F with 30 parts by weight of Pro-Seal 501A. Mix for approximately 5 minutes using a spatula or similar tool. Pro-Seal 501F/501A adhesive should not be thinned.
NOTE: Work life of prepared Pro-Seal 501F/501A is 15 minutes. The sequence of steps in preparation for bonding should be such that the adhesive can be applied and the mat bonded immediately after preparation of the adhesive.
(b) EP45 #X1 film sheet adhesive method. 1) Thoroughly stir BMS 5-55 cement. 2) Brush a primer coat of BMS 5-55 onto side of mat to be bonded to floor and
allow to dry for 10 to 20 minutes.
3) Brush a second primer coat of BMS 5-55 onto mat and allow to dry until tack-free. The drying will require a minimum of 60 minutes at room temperature, 65°F minimum.
4) Starting at one edge of mat, apply tacky side of EP45 #X1 film adhesive to side of mat primed with BMS 5-55 cement. 5) Roll adhesive down progressively toward other edge. Keep free edge of adhesive away from mat to achieve smooth contact. 6) Press adhesive down firmly with overlapping roller strokes.
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