I. Scope of application:
(a) Pre-shop:
Mainly tunnels, basement floors, side walls, etc.
(b) wet shop:
Mainly non-leaking roofs, underground waterproofing projects, no use of open flames, tunnels, pools, etc.

II. Construction requirements:
1. Before the construction, the grassroots should be cleaned and the foreign matter should be removed.
2. The grass-roots level should be smooth, dry, clean, and must not be loose, sanding, or peeling.
3. The waterproof membrane is completely spread on the base, flattened, and compacted.
4. Pay attention to fire during construction.

III. Construction method
(a) Pre-paving method:
1. Membrane pre-paving: The reactive adhesive layer of the membrane is oriented toward the structural layer , the other side faces the base layer.
2. Membrane seams: Peel the reserve isolation of the lapped edges, directly bond them, they are 70mm long and 80mm wide.
3. Anti-sticking of rolls: Remove the release paper and pour the structural concrete.
(b) Wet shop method:
1. The treatment of the grassroots: clean the surface of the base layer, the base layer can be wet, but there can be no clear water, the dry base layer should be sprinkled with water to be wet.
2. Preparation of cement paste: directly add water into the cement, weight ratio of cement and water is 1:0.3 to 1: 0.4, can also be adjusted according to the actual situation, stirring 2min, keeping stationary for 5 ~ 8min ,then can be directly construction.
3. Paste membrane: Use a trowel or a scraper to evenly apply the cement paste to the base layer, when the surface is scraped, apply the polymer reactive adhesive waterproof sheet on the top , and exhaust air and compact the membrane.
4. Seam paste: the adjacent short edge seams should be staggered by more than 1m. When construct the upper edge seams, tear away the reserved seams on the edge seams, paste them directly stick according to the paste mark line, and then use special seals to strengthen the sealing and closing treatment.

IV. Details of the construction process
(a) root of the tubes:
Firstly apply JS paint or polyurethane paint around the root of the tube, make a roll with the same diameter as the tube, with a height of 40cm, cut into strips of 20cm, stick around the root of tube, and place the strip on the bottom of the tube. The no cut part of the membrane is wrapped on 20cm of the tube root, and then cut a square of 20cm in length and width , cut the middle, just enough to fit under the tube. Then use a special sealant to close the surrounding seals

(Source: Internet)