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Sealing note

Edit: Kejian Polymer Materials (Shanghai) Co.,Ltd    Date: Jan 23, 2016
source:

1, surface preparation

The surface should be clean, firm, dry and oil-free, grease and dirt on the surface such asrelease agents, curing membrane and hydrophobicagent. Thoroughly clean all loose particles anddust

2, base

Use Primer for concrete and porous surfaces 3.

For non-absorbent surfaces, please consult us.

3, construction

Minimum temperature is 5 degrees centigrade. Forease of use, small packing stores in 10-20 ℃temperature. Used as an adhesive, the dot orbead applied to prepared surfaces, is requiredto bond components crowd in or on the surface.Adhesive thickness depends on the surfacetexture (1mm-5mm). Sealing is complete, 20% anddetergent-water solution to wipe the jointsurfaces. To keep the seams when clean and useprotective tape on both sides, should be removeprotection tape before sealant is cured. Sealingsurface should be kept in wet environments.

4, joint design

At ambient temperatures, joint width to allowthe change:

More than 0 ℃, sealed seams mean width of ± 12.5%

More than 0 ℃, sealed seams mean width of ± 5%volume

5, general use

Polyurethane sealants, adhesives to successfullysealing joints, joint design concern below:

Joint width 12mm, width to depth ratio of 1:1

Joint width 12mm, width to depth ratio of 2:1

In order to ensure the correct aspect ratio, andprovide solid backing for sealing adhesive, andto prevent the sealing glued at the bottom seam,polyurethane sealants, adhesives must sealfixed, does not rot, filled with an absorbentbacking materials, such as fibreboard mixed withinsulation tape or use open or closed-cellpolyethylene porous polyurethane backing. Oil ortar impregnated backing materials cannot beused.

6, expansion joints shall be designed to followthe rules

Joints in general have the following rules:

Width 12mm

Width: Dark =1:1 or W=D

Width 12mm-40mm

Width: Dark =1:0.5 or W=2D

Move on concrete and masonry seam, sewn deep at least 8mm

Note: 1, corners are usually due to lack ofvibration of concrete joint is relatively weak,should therefore deal with a beveled or recessed

2, the end of seams must not limit thedeformation of sealant, or after the joint usemay cause damage.

3, seam sealing joints in depth should beadopted into a suitable backing material toadjust.

4, corner also proper backing or backing, orjoint swelling may damage sealing adhesive.


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