Elastothane pu GG sealant 4lit

ELASTOMERIC PU GUNGRADE JOINT SEALANT. 

Elastothane pu GG is an elastomeric one- part, solvent and PVC free, medium modulus moisture-curing polyurethane construction adhesive sealant that may be painted.

Elastothane pu GG has a high surface hardness, permanent elasticity and high tensile strength. Elastothane pu GG has excellent adhesion on all typical construction materials.

Elastothane pu GGis very suitable in wood and metal construction applications, especially where highly flexible bonding properties are required.

Elastothane pu GG is also suitable for sealing of active joints, bedding of panels, coping joints, window and door perimeter sealing, connection joints for typical applications in the building and prefabrication industry.

Elastothane pu GG is also suitable for sealing floor joints, roof-tile bonding, sealing and bonding of metal elements (ventilation ducts, gutters and spouts) etc.
ADVANTAGES 

• Bonds and seals at the same time.
• Permanently flexible.
• Non-sag consistency – exceptional thixotropy.
• Adhesion to a wide range of substrates.
• Vibration and sound dampening properties.
• No change in volume – no shrinkage.
• High bond strength.
• Excellent tooling properties.
• Allows equalised stress transfer due to permanent elasticity.
• Excellent resistance to ageing and weathering.
• Easy to use one part.
• Sandable and over-paintable with many water/solvent based paints.

TYPICAL PHYSICAL PROPERTIES DURING APPLICATION
Application by	Extrusion gun
Tack free time @ and 50% RH	55-65 minutes
Cure rate 23°C/50%RH	3 mm/24 hr
Application temperature	5°C to 35°C
Cure mechanism	Moisture cured
Chemical basis	Polyurethane
Specific weight	1.27 ± 0.02 gr/cc

TYPICAL PHYSICAL PROPERTIES OF CURED MATERIAL
Service temperature	-40°C to 80°C with short periods at 120°c
Movement accommodation factor	Total movement must never exceed 12,5% of neutral width of joint
Elastic recover  (DIN 52458)	85%
Elastic modulus @ 100% (DIN 52455)	0,8 ± 0.1 N/mm²
Tensile strength  (DIN 53504)	± 1.9 ± 0.1 N/mm²
Elongation @ break (DIN 524504)	> 550
Hardness Shore A (DIN 53504)	40 – 45

PREPARATION OF JOINTS 

Thorough preparation of joints is essential if a satisfactory seal is to be obtained. For concrete surfaces, stone or masonry, all traces of dust, laitance, mould oil, any previous sealant and all other foreign material must be removed by means of sandblasting or mechanical abrasion, followed by dust removal by means of blowing out with dry, oil free compressed air. For glass surfaces, ceramic or metal, all traces of oil, grease or protective coatings or film should be completely removed. The method of removal is governed by the nature of the contaminant. Generally the surfaces are cleaned with alcohol or thinners no. 3. The cleaning material should be checked for compatibility with materials that it will come into contact with.

PRIMING OF JOINTS 

Elastothane pu GG generally has good adhesion to most common building substrates even without the use of a primer. However, it is advisable to do a preliminary check. The use of primers ensures good bonding. Porous substrates, such as wood, concrete, and fibre cement, should be primed with Elastothane pu GG primer P. Primer must be brushed well into the faces of the joints, to ensure complete coverage (thin layer). Drying time is 30 minutes minimum and 5 hours maximum. In the case of excessively porous surfaces, a second coat should be applied. Non-porous surfaces such as glass, ceramics and metals must be primed with Elastothane pu GG primer NP. Surfaces must be wiped with a clean dry cloth moistened with Elastothane pu GG primer P.

Note: Elastothane pu GG  has been performance certified incorporating the use of primers. The use of primers can prevent the formation of bubbles and chemical reaction which may be caused by excess moisture, excessive heat and thermal movement during and after the application of sealant. Another important function of priming is the guaranteed long term adhesion of Elastothane pu G to joints. The primers also prevent staining in the case of porous substrates as well as migration of plasticizer to the substrates/sealant interface.

FILLETS 

Where a triangular pointing fillet cannot be avoided, the fillet must be applied such that it is not less than 10 mm across the face and with a rounded (convex) surface. Where there is a gap greater than 5 mm between the adjoining surfaces, a back-up material must be inserted, and the sealant applied in a sufficiently large fillet to ensure adequate adhesion area on each surface.

BACK-UP MATERIAL 

Suitable back-up materials must be used to adjust sealant depth in the joint. SEALROD is self-releasing material, soft-board or cork has been used as the joint filler and the sealant is going to applied without SEALROD , a plastic strip bond breaker (polyethylene) must be placed on the filler surface before sealant is applied.

PROTECTION OF ADJACENT SURFACES 

Masking tape applied to areas adjacent to the joint will protect them from contamination and enable the joints to be finished to a neat line. The masking tape should be applied after the joint has been prepared, prior to any priming or sealing operation and removed after all finishing and tooling operations have been completed, but before the sealant has cured.

MIXING 

No mixing required.

COVERAGE

Theorectical Coverage for estimating purposes
Cross section of joint (mm)	m per 310 ml cartridge
25 x 12	2,00
20 x 12	2,25
12 x 12	4,17
6 x 6	16,67
No allowance has been made for wastage

APPLICATION

Application can be by hand or pressure-operated gun. It is essential to ensure complete contact between the sealant and the joint surfaces.

TOOLING

Tooling of sealants is necessary for complete air-free filling of voids and to assist in making contact to the surfaces to which the sealant is applied. The surfaces of the joint should be smoothed with a clean knife or spatula. A mild solution of liquid soap and water can be sprayed onto the tooling spatula if required.

CLEANING 

Tools and mixing equipment should be cleaned immediately after use, and before the material has set, with  super brush cleaner followed by washing with soap and water.

PAINTING OVER SEALANT 

It is not recommended that a flexible sealant be over-coated by less flexible coatings as joint movement will cause rupturing of the coating. Also, plasticizer migration from the sealant into the coating could result in excessive dirt pick-up. Based on the outcome of preliminary tests the sealant may be over painted with a good quality water or solvent based paint.

APPLICATION TEMPERATURE 

5°C to 40°C.

MODEL SPECIFICATION 

Single-pack, moisture-cured, medium modulus, moisture-curing polyurethane construction adhesive sealant. Primer: U-110 for porous substrates such as concrete. Primer: U-120 for non-porous substrates such as metal and certain plastics.

The sealant will be Elastothane pu GG, a one-component, moisture-cured, medium-modulus polyurethane sealant applied in accordance with the recommendations of Construction Chemicals, including primer P or primer NP where necessary.

Do NOT use in swimming pools.

PACKAGING 

4 LIT PACK .

HANDLING & STORAGE 

This product has a shelf life of 12 months if kept in a dry cool place in the original packaging. In more extreme conditions this period might be shortened.

HEALTH & SAFETY 

Uncured Elastothane pu GG is toxic and should not be allowed contact with skin and eyes. The use of gloves and eye protection is advised. Splashes into eyes should be washed immediately with plenty of clean water and medical advice sought.

Ensure the working area is well ventilated during application and drying. Always wear gloves when working with the material and avoid excessive inhalation and skin contact. Cured Elastothane pu GG is inert and harmless.

IMPORTANT NOTE 

This data sheet is issued as a guide to the use of the product(s) concerned. Whilst Construction Chemicals endeavors to ensure that any advice, recommendation, specification or information is accurate and correct, the company cannot – because IT has no direct or continuous control over where and how products are applied – accept any liability either directly or indirectly arising from the use of products, whether or not in accordance with any advice, specification, recommendation, or information given by the company.

FURTHER INFORMATION 

Where other products are to be used in conjunction with this material, the relevant technical data sheets should be consulted to determine total requirements.Construction Chemicals has a wealth of technical and practical experience built up over years in the company’s pursuit of excellence in building and construction technology.