Reconstec 350

Limestone restoration mortar


RECONSTEC 350 is a mortar specially designed for the restoration of limestone. Non-shrink and very good bond to the stone. Easily applied to clean, sound substrates. Contains no synthetic polymers.


Application time: Approximately 1 hour after mixing. Application time is dependent on temperature-it is faster in heat, slower in cool.
Compressive strength:
(ASTM C-109)
3 days
7 days
28 days
15 MPa
22 MPa
30 MPa
(2180 Psi)
(3200 Psi)
(4360 Psi)
Flexural strength
(ASTM C-348):
10,9 MPa (1581 psi)
Modulus of elasticity
(ASTM C-469):
13,1 to 14,5 GPa (1 900 000 to 2 100 000 psi)
Bond strength
(ASTM C-882 modif.):
10,4 MPa (1508 psi)
Linear coeff. of
thermal expansion:
3,6 to 4,6 x 10-6/°C
Length change
(ASTM C-157):
0,015 to 0,020 % (28 days)
Porosity: 10 %
Water Absorption: 12 %
Mixing Ratio: The mixing ratio is approximately 5 parts powder to 1 part water by volume.
Finishing Time: Approximately 1 hour after application-depends on temperature, relative humidity and type of finish desired.
Specific Gravity: 1,8.
Packaging: Plastic pail contains 20 kg (44 lb).
Yield: Approximately 0.45 ft3
Shelf life: 1 year in original, unopened pail.


Remove all impurities, dirt, grease, other bond inhibiting materials from surface. Preparation work should be done using manual or pneumatic cutting techniques. Be sure patch area is not less 10 mm (½") depth. Dampen surface to be repaired with clean water.


The mixing ratio is approximately 5 parts powder to 1 part water. Use clean container. Pour water into mixing container. The mixing may be done by hand or using a slow speed drill (300-450 rpm) with a mixing paddle. The mortar should be the consistency of damp sand. Do not over water. Do not over-mix. Working time is approximately 1 hour.


Mortar must be scrubbed into substrate, filling all pores and voids. Use a steel trowel. Force material against edge of repair, working toward center. When the mortar is the consistency of dry sand screed to desired finish.


Use mist spray of clean water for at least 3 days after installation, several times a day.


Remove the mortar from tools and mixing equipment with water. Cured material can only be removed mechanically.


Avoid eye-contact and prolonged contact with skin. May cause irritation to sensitive skin. In case of skin or eye contact, wash thoroughly with water. If eye contact, consult nearest doctor.



Information given is correct to the best of our knowledge and the product is satisfactory for the purpose for witch it is intended. However, no guaranty, express or implied is given because every possible variation in the methods of its use or conditions under witch it is applied cannot be anticipated. Our liability under this guarantee shall be limited to replacement of our product found to be defective or at our option, to the refund of the purchase price of said product.

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