MAXFLEX® 900
POLYSULPHIDE SEALANT

Description

Dual-component polysulphide polymer sealant.

Applications

- Sealing of all kinds of construction joints, glazing, and in general, where high performance sealing is required.
- Sealing of heavy and light prefabs.
- Concrete-brick joints.
- Water tanks.
- Channels, irrigation ditches, traps.
- Immersion joints.
- Concrete-surface joints.

Properties

Dual-component sealant, which once mixed react chemically in order to produce elastomeric features material, of low modulus, and good adhesiveness to most materials commonly used in construction such as: concrete, wood, metal, glass, ceramics, etc. It has high mechanical, chemical and weather resistance.

Specifications

MAXFLEX-900 meets the following international standards:
DIN 18540 - 1973
ASTM 920-79
US TT-S-227 a-b+c
BS 4254

Instructions

DIMENSIONING OF JOINTS. The joints width must be at least 4 times larger than the foreseen movement. Sealing depth must be half the widht of the joint with the exception of under 15 mm. joints, where the depth must be 8 mm.

FORMATION OF JOINTS. It is necessary that a filler material is used in order to avoid adhesion of MAXFLEX-900 to the bottom of the joint which would exercise unnecessary tension of the sealant. Meanwhile, regulation of its depth is achieved as well as greater yields. The material to be used must be inert, mechanically stable, homogeneous, corrosion-resistant, and must not adhere to either the sealant or contiguous materials. A particularly recommendable product is closed-cell polyethylene foam, extruded in regular section strips, such as our MAXCEL.

TREATMENT OF THE SURFACES. The surfaces to be sealed must be clean and dry. If necessary, cleaning with non-grease solvent such as acetone is recommended. For porous materials, it is essential that a primer such as our PRIMER 900 is used. Any material not known by the user in terms of adhesiveness, must first be tested or consulted with our technical department.

PROCEDURE. MAXFLEX-900 is a dual-component sealant supplied in a single container, in appropriate proportions, and unmixed. The mixture must be made inmediately before application by means of a low-revolution electric drill (200-400) equipped with a fork-shaped whisk. Beating must be done with circular motion in both directions coming close to the container walls and bottom, avoiding, as far as possible, trapping of air. This operation should be continued until the colour of the mixture is homogeneous. Excessive beating will heat up the product, thus reducing time available for its application. The mixed product may be rebottled in cartridges by using our cartridge loader. Application should be effected by means of our P-2 Gun with a B-1 Nozzle levelled to the required size, or by means of a spatula. In order to avoid messing the edges of the joint, it may be protected with masking tape, which should be removed before the product reticulates. For a better finish, the sealant may be smoothed with a spatula.

YIELD. The following formula is an approximate guideline in order to calculate foreseen yield for a can of MAXFLEX-900.

L= 2500 / ( A x D )

Where:
L = Lenght of sealant in meters obtained per can of MAXFLEX-900
A = Width of the joint in mm.
D = Depth of the joint in mm.

FURTHER TREATMENT. MAXFLEX-900, in general, requires no protection. However, for joints in chlorinated swimming-pools, it should be protected with 2-3 coats of chloro-rubber paint.

NOTE. MAXFLEX-900 polymerizes as a result of a chemical reaction between the two components. Temperature and humidity determine the speed of this reaction, which in like manner affect the time available for product application. As a general rule, increased temperatures mean less application time available and vice-versa. For this reason, MAXFLEX-900 should not be applied at temperatures below +5°C.

Cleaning

With the product not yet reticulated, the tools may be cleaned with xylene. Once the materials has hardened, it may only be removed by mechanicals means. NEVER USE BLOWTORCHES FOR CLEANNING SINCE TOXIC GASES ARE PRODUCED.

Auxiliary Materials

MAXCEL
Expanded polyethylene strip for bottom of joints.
PRIMER 900
Primer for porous materials.
P-2 Gun
Cartridge-application gun.
Cartridges
Cartridge/piston ensemble for rebottling from can.
B-1 Nozzle
Special nozzle adaptable to the P-2 Cartridge/Gun ensemble.
Whisk
Fork-shaped.
Cartridge loader
Device designed for simultaneous loading of 5 cartridges.

Technical Features

NON-CURED MAXFLEX-900
PART A)
Appearance: | Homogeneous creamy paste
Slump resistance NF P 85501: | 0 | mm
Solids (2 hours at 110°C): | 100 | %
PART B)
Appearance: | Brown homogeneous creamy paste.
Solids (2 hours at 110°C): | 100 | %
PART A) x B) mixed
Appearance: | Homogeneous creamy paste.
Slump resistance NF P 85501: | 0 | mm.
Solids (2 hours at 110°C): | 100 | %
Application time (at 23°C): | 2-4 hours
Application temperature: | 5-50 | °C

CURED MAXFLEX-900 (4 weeks at 23 ºC and 55% H.R.)
Appearance: | Similar to rubber.
Shore hardness A DIN 53505: | 23 | --
Elastic recovery NF P 85506: | 85 | %
Elastic moduls 100% DIN 53504: | 0,18 | MPa
Traction resistance DIN 53504: | 0,50 | MPa
Elongation at break DIN 53504: | 450/550 | %
In-service joint movement: | 25 | %
In-service temperature resistance: | -30/80 | °C
Chemical resistance:
Water, soapy water, brine: | Excellent
Inorganic diluted acids and alkalis: | Very good
Mineral oils and grease: | Very good
Oil, fuel, hydrocarbons: | Very good
Other organic products: | Consult

Storage

Keep in a cool, dry place:
Lifetime: 9 months in original sealed containers.

Presentation

In cans containing 2,5 litres.
4-cans boxes.

Colour

Grey.

Health and safety

The MAXFLEX-900 catalyst or curing agent contains heavyweight metal components. Avoid ingestion or direct contact with skin. Wash hands before eating or smoking. Use protective gloves. Once cured, can be used in water tanks and swimming pools.
PRIMER 900 is inflammable. Do not smoke or use unprotected flame during application. Avoid prolonged inhalation of vapours and contact with skin. In case splashing into eyes, rinse thoroughly with plenty of water and, if necessary, see a doctor. Use gloves, and in case of splashes, wash with industrial detergent while the product is still fresh. NEVER USE BLOWTORCHES FOR CLEANNING SINCE TOXIC GASES ARE PRODUCED. DO NOT WASH HANDS WITH SOLVENTS.

Guarantee

The information contained in this leaflet is based on our experience and technical knowledge, obtained through laboratory testing and from bibliographic material. DRIZORO reserves the right to introduce changes without prior notice. Any use of this data beyond the purposes expressly specified in the leaflet will not be the Company’s responsibility unless authorised by us. We shall not accept responsibility exceeding the value of the purchased product.

© 2003 DRIZORO S.A. All rights reserved.