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MASTIC PU
Single component polyurethane mastic
MASTIC PU is a single component polyurethane mastic that cures rapidly on contact with atmospheric moisture, forming a hard sealant, elastic and of a medium-high elasticity modulus. For sealing of vertical and horizontal joints.
Use
- Can be used for heavy and light precast panel expansion joints, wood, aluminium and PVC joinery seams, and expansion joints in traditional construction.
- Is highly recommended for bonding baked clay and concrete roof tiles.
- This sealant has a good adhesion without primer on other current materials : most lacquered metals, polyester, glass, stone, ceramic tiles.
| hardness Shore A at 23ºC | ± 40 |
| application temperature | 5~35 ºC |
| frying tack | 30~60 minutes |
| curing total thickness of 3 to 4 mm | 24 hours |
| elongation at break at 23ºC | >600 % |
APPLICATION METHOD
SUBSTRATES PREPARATION
- The substrates must be clean, even, dry, free of dust, oil, grease and any contaminants that could harm bonding.
- They may be cleaned with, methylethylketone (MEK), acetone or grease remover..
- Apply a primer if necessary.
- Check the compatibility of the solvent used with the substrates.
- When using solvents, extinguish all sources of ignition and carefully follow the safety and handling instructions given by the manufacturer or supplier.
- If necessary, rub down metal surfaces beforehand.
- After rubbing down, the surface should be cleaned.
- Allow the substrate to dry after degreasing.
- We recommend to clean concrete with a metal brush.
CAULKING
- MASTIC PU can be applied by a manual or pneumatic gun.
- After application, use a putty knife to smooth the joint with soapy water.
- This product should be used within 24 hours of opening the cartridge or sausage ; otherwise, the sealant could harden inside. Do not apply at a temperature under 5 °C.
- In cold weather, store the cartridges at about 20 °C before use.
- Avoid any contact with non-cured MS, hybrid PU or silicone sealants as well as with alcohols or ammonia during curing.
CLEANING
- Tools should be cleaned with, MEK or acetone before the sealant has completely cured. After curing, abrasion is necessary.
SHELF LIFE
12 months in the original, hermetically sealed packaging between 5 and 35 °C
PACKAGING
Boxes of 20 ud.of 600 cm³ each, grey color.
HANDLING
Not classified as hazardous. Read the material and safety data sheet before use. ( MSDS)
YIELD
Tube (mm) |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
Length of cord (m) |
190 |
85 |
47 |
30 |
21 |
15 |
11 |
9 |
7 |
TECHNICAL DATA
Appearance |
pasty |
Colorgrey |
grey |
Density at 23 °C ISO 1675 |
1.18 ± 0.05 |
Sagging ISO 7390 |
none |
Application temperature |
5 ~35 °C |
Skin formation time at 23 °C and 50 % realtive humidity |
±70 min |
Cure time at 23 °C and 50% relative humidity |
3 mm/24 h |
Shore A hardness (internal method IT-20 after ISO 868 - 3 seconds) |
±40 |
Modulus at 100 % ISO 8339 |
±0.4 MPa |
Elongation at break ISO 8339 |
>500 % |
Tear strength DIN 53515 |
±10 N/mm |
Temperature resistance |
- 40 ~ + 80 °C |
Resistance to dilute acids and bases |
average |
UV resistance |
good |
Water and salt spray resistance |
excellent |
Compatibility with paints |
water based : yes |
Specific data |
modulus at 100 % (ISO 37) : ca. 0.3 MPa |