M&G DuraVent DuraStack® User Manual
Page 8

8
CHImnEy anD FIttIng JoInt aSSEmBLy
All components have a male and female end. 
The installation orientation is indicated on 
the labeling of each chimney section with an 
arrow. The arrow indicates the direction of 
the flow. Clean all inner and outer surfaces
of the male and female ends with an 
appropriate organic solvent, such as acetone, 
Mek, or other commercial degreaser.
1. Apply a bead of S-650 sealant about 1/8” 
thick around the male end of chimney and 
for Grease duct application, add a bead of 
S-2000 sealant at the edge of the female 
chimney (see Figure 2). See Table 5 for 
approved sealants.
2. Insert the female end, of another section 
of chimney, over male end with sealant (see 
Figure 3).
3. Insert the assembly band (see Figure
4) around the joint of the two sections 
assembled in Step 2. A small bead of S-650 can 
be applied on the inner groove of the band 
prior to installation for better leak tightness.
4. Using a phillips screwdriver, connect the 
two ends of the band as shown in Figure 5.
5. Where the chimney is installed outside, an 
exterior sealant S-375 must be applied at the 
upper joint of the band and the outer casing,
see Figure 5.
Figure 2
Figure 3
Figure 4
Figure 5
Grease Duct Application: Add a
bead of S-2000 sealant at the
edge of the female end.
Add S-650 sealant here.
Apply S-375 sealant here for exterior installation.
