402

Dura Crete ST

Polymer Modified, Shrinkage Controlled, Cementitious Structural Grade Repair Mortar

AQUASEAL

Description DURA-CRETE ST is a single component, polymer

modified cementitious repair mortar. It is supplied

as a ready to use dry powder that only needs

addition of clean water on site to produce a repair

mortar suitable for hand repairs where significant

load bearing is required. The product is shrinkage

controlled which allows the dimension of repair to

remain stable and thus eliminating repair failure

due to shrinkage cracking as the product dries.

DURA-CRETE ST can be applied in thickness

between 5mm and 100mm depending on

application.

Features Suitable for horizontal, vertical or overhead

repairs

Developed to provide an easy to apply

product that is suited to local conditions

Provides enhanced durability and working

life

Excellent adhesion and shrinkage control

allows repair to be done once

Repair mortar is very compatible with the

host concrete

Uses

DURA-CRETE ST is suitable for application by

hand to most structural and load bearing repairs:

Repairs to areas where formwork cannot

be erected

Patch repairs to concrete floor slabs

Repairs to stairs, steps and other areas

subject to repeated heavy traffic

Arras repairs to joint edges

Typical properties

Properties l i s ted are only for guidance and are

not a guarantee of performance

Technical Data & Physical Properties:

Appearance: Dry powder

Approx. 2180 kg/m3

Flexural Strength: >9 N/mm2 at 28 days

(BS 6319, Part 3)

Tensile Strength: >4 N/mm2 at 28 days

(BS 6319, Part 117)

Compressive Strength: 56 N/mm2 @ 28 days

(BSEN 196-1)

Pull off Stress 2.7 N/mm2

(BSEN 1881-207)

( Concrete Failure)

Flash Point not flammable

Yield 13.2L per 25kg bag

402

Dura Crete ST

Polymer Modified, Shrinkage Controlled, Cementitious Structural Grade Repair Mortar

AQUASEAL

Technical information given in this data sheet is true and exact to the best of our knowledge. The data sheets are revised /updated regularly and it is important to ensure that the latest release is used for reference and recommendation. All data provided is the result of numerous tests, assessment and analysis conducted under laboratory conditions. Climatic disparity in

temperature, humidity, etc., along with conditions of substrate, may alter the values.

(Durabuild is manufactured by AQUASEAL QATAR FACTORY WLL.) PO Box 201019, Doha, Qatar Telephone +974 44678826 - Fax +974 44506819

www.durabuild-qatar.com / info@aquaseal-qatar.com

Method of Use: As a cementitious repair mortar,

the recommended thickness limits for a single

application of DURA-CRETE ST are as follows:

Minimum applied thickness = 5mm

Overhead sections = Up to 25 mm

Vertical sections = Up to 35 mm

Small pockets or horizontal = Upto100 mm

Maximum length = Up to 3 m

If the repair area is greater than 2.5m2, alternatively

the micro-concrete product DURA-CRETE MC

Surface Preparation: The surface that is to receive DURA-CRETE ST

should be sound, clean and free from contaminants,

and all loose particles must be removed. The

concrete surface should be thoroughly soaked with

water prior to the application and if needed, a

suitable bonding agent applied. For filling voids in

the concrete, a putty-like consistency of the

material can be mixed and applied with a trowel.

Mixing & Application: DURA-CRETE ST

should be mixed with clean water to attain the

required consistency. The maximum quantity of

water per 25kg bag is 3.75L. It is advisable to use

an electric drill type mixer and over mixing should

be avoided. DO NOT use part bags or add more

water to the mix as this will affect the performance

of the material.

The mixed material should be applied to the

prepared area with minimum of troweling and then

left to set for a short period before final troweling.

For minor blemishes, apply with a brush or roller

after which the excess material can be scraped off.

Cleaning: Tools and equipment should be cleaned

with water immediately after use before the product

sets. Once firm it will need to be removed by

mechanical means.

Limitations:

Do not use DURA-CRETE ST when the

ambient temperature is below 5°C and falling;

In areas where a substrate/repair barrier is

required, or enhanced bond strength/working

time is needed, or where the substrate is

permanently wet or damp (seawalls, quays,

etc.), then DURA-BOND EP epoxy bonding

agent should be used;

Do not part mix , use only whole bags of

product;

Do not expose to running water either during

application or before the product is set;

Water ponding is not recommended for curing.

Packaging & Storage: DURA-CRETE ST is

available in 25kg bags and has a shelf life of min.

12 months when stored off the ground, undercover

in cool, shaded and dry warehouses, out of direct

sunlight, at temperatures between 2°C and 30°C.

In extreme tropical climate, the product must be

stored in cooled ambience. Excessive humidity and

over exposure to UV may result in reducing shelf

life to as little as 4 months. DURA-CRETE ST is

non-flammable.

Health & Safety: DURA-CRETE ST contains

cement powders which when mixed with water, or

becoming damp, release alkalis which can be

harmful to the skin. Therefore, care should be taken

to avoid contact with skin or eyes, and these

products should not be swallowed. As with all

construction chemical products, caution should

always be exercised. Protective clothing such as

gloves and goggles shall be worn whilst handling

and spraying. Wearing long sleeve overall, safety

shoes and face mask is recommended for maximum

safety. Avoid breathing in the dust or vapors and

use in well ventilated areas, or use a breathing

apparatus in enclosed areas. Reseal all containers

after use and ensure product is stored as instructed

on the safety section of the labeling. If any comes

in contact with the skin it should be removed with

an industrial skin cleanser, followed by soap and

water – DO NOT use solvent. Treat any splashes to

the eyes with fresh water immediately and seek

medical assistance. Should any of the products be

accidentally swallowed, do not induce vomiting,

but call for medical assistance immediately.

Spillages of DURA-CRETE ST should be swept up

and transferred to suitable containers for disposal.

The spill area should then be hosed down with

large quantities of water. The disposal of spilt or

waste material should be carried out in accordance

with local legislation under the guidance of the

local waste regulatory authority.

For more details, please refer to the MSDS released

on each Durabuild product.

Limited Warranty: It is the responsibility of

the customer to determine the suitability of the

product for the intended purpose. Factors such

as temperature, surface preparation and

applicator’s skill are beyond the control of the

company. Therefore, the manufacturer’s

liability is limited to the replacement of the

defective material only. VER 1.4.13