Two-Part Polyurethane Sealant

Two-Part Polyurethane Sealant

Double-component polyurethane building sealant Product introduction Double-component polyurethane building sealant is a two-component reaction type sealant, it’s formed by component A and B. Component A is milk-white or light yellow sticky performed polymer, while component B is black cream or...

Product Details

Two-Part Polyurethane Sealant

Double-component polyurethane building sealant

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Product introduction

Double-component polyurethane building sealant is a two-component reaction type sealant, it’s formed by component A and B. Component A is milk-white or light yellow sticky performed polymer, while component B is black cream or liquid mixed by hardening agent and other co-catalyst. It has certain elasticity and stickiness after hardened. Double-component polyurethane building sealant is a self-leveling product.

Application scope

Double-component polyurethane building sealant has been widely used in sealing concrete expansion joints and settlement joints of construction like subway, tunnel, airport pavement, highway, bridge and so on. Also applicable for sealing expansion joints in drainage system of water factory, swimming pool, water tank, power station, retaining dam, sewage disposal system and other drainage systems.

Product feature

1. Good wear resistance, good low-temperature flexibility;

2. High adjustability, high mechanical strength, good adhesive property;

3. High flexibility and recovering ability, can be applied for sealing dynamic joints and  

deformation joints;

4. Good weather resistance, good oil resistance, good anti-aging property and low price.

Technical index

Tested item

Standard/requirement

Tested data

appearance

 even-textured, sticky liquid, bubble - free

 even-textured, sticky liquid, bubble - free

density    g/cm3

rated value±0.1

1.14

flowability

Self-leveling type

Smooth and flat

Smooth and flat

Surface drying   time,h

≤8

7

Usable time,h

≥1

2

elastic recovery rate,%

≥70

95

modulus in tension,Mpa

23

≤0.4

0.30

-20

≤0.6

0.49

Elongation bonding property

No destruction

  No destruction

Elongation bonding property after water   immersion

No destruction

No destruction

Bonding property after Cold drawing and hot   pressing

No destruction

No destruction

mass loss rate,%

≤8

2.6

Application method

1. joints treatment.

1) Completely clean the joints or seams, use wire brush or scraper while necessary.

2) Fill the deep joint seams with foamed plastic or oakum as backing material, keep the 

application area fully dry.

3) Stick a 50mm wide protective tape on the area of 10mm on both side of the seam, in

case the polyurethane sealant stain other construction surface. 

2. Mixing proportion.

Component A :component B = 1:1, mix the two components together and stir evenly to use. 

3. Operation:

1)Sealing level seam: fill the mixed sealant into the seam slowly until it’s full;

2)Sealing vertical seam: wait the mixed sealant to solidify into colloid, put it in the glue gun or use scraper to fill the sealant into the seam;

3)Peel the protective tape after application, avoid water flushing or rain.( surface drying time≦24 hours, water test can be done after 7 days, reach all the property after 28 days)

4)Use out the mixed polyurethane sealant in 2 hours, otherwise the glue will be solidified to make the application difficult and cause wastage;

4. Attention;

1)Operation temperature should be above 5℃, keep the site ventilated while operate;

2)For sealing vertical seam, if the sealant is two watery, mix a ratio of 5-10% thickening agent to stir into colloid to use, use out the mixed sealant within 40 minutes;

3)Sealant colloid pressed into seam should be dense and plump, no gap, no break. Smooth the sealant after embedding to make it smooth and neat;

4)In order to avoid sealant stain the veneer, isolation paper should be stick on both side of the application area;

5)If it’s necessary to wash the tool after application, use xylene or acetone; 

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Package& storage & transport

1. Package: pack the A, B component separately in two different iron drums, package weight:

40kg/ set.

2. Storage: keep the product in the warehouse which is ventilated, cool and dry, avoid high temperature and water steam, avoid fire or flare, shelf life 12 months.

3. Transport:  Avoid directly sunlight and rain, avoid crash, maintain the package complete.


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